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Engine Controls - System & Component Tests: Overview Chevrolet Venture I

Testing & Diagnostics 4 illustrations ~470 words

MODEL IDENTIFICATION

Vehicle model is identified by fifth character of Vehicle Identification Number (VIN). VIN is stamped on metal pad on top of left end of instrument panel, near windshield. See MODEL IDENTIFICATION table.

Series (1)	Model
"C"	2WD Pickup, Sierra, Silverado, Suburban, Tahoe & Yukon
"G"	Cutaway, Express, RV Cutaway & Savana
"K"	4WD Pickup, Sierra, Silverado, Suburban, Tahoe, Yukon & AWD Escalade
"L"	AWD Astro & Safari
"M"	2WD Astro & Safari
"S"	2WD Blazer, Envoy, Jimmy, Sonoma & S10 Pickup
"T"	4WD Blazer, Bravada, Envoy, Jimmy, Sonoma & S10 Pickup
"U"	Montana, Silhouette & Venture
(1) Vehicle series is fifth character of VIN.

(1)	Vehicle series is fifth character of VIN.

MODEL IDENTIFICATION

POWERTRAIN CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION

Note. Three types of engine control modules are available and are used according to engine configuration. All 2.2L (VIN 4), 3.4L, 4.8L, 5.3L, 6.0L and 6.5L vehicles are equipped with a Powertrain Control Module (PCM). All 4.3L, 5.0L, 5.7L (gasoline) and 7.4L vehicles are equipped with a Vehicle Control Module (VCM). Vehicles equipped with 5.7L flex-fuel (gasoline and CNG) engines use both PCM and an Alternative Fuel Engine Control Unit (AF ECU). The AF ECU controls CNG operation, PCM controls gasoline operation.

Scheme 2

Scheme 2: Powertrain Control Module Harness Connector End View & Terminal Identification (2.2L - VIN 4)

Powertrain Control Module Connector Terminal Identification (2.2L - VIN 4)

Connector	Terminal No.	Wire Color	Function
C1	1-5	—	Not Used
C1	6	ORG/BLK	(2) Ground
C1	7	BRN/WHT	CMP Sensor Signal
C1	8	PPL/WHT	7X CKP Sensor Reference Signal
C1	9	—	Not Used
C1	10	GRY	Fuel Tank Pressure Sensor Reference Voltage
C1	11-17	—	Not Used
C1	18	BLK/WHT	PCM Ground
C1	19	PNK	Ignition Voltage
C1	20	ORG	Battery Voltage
C1	21	DK BLU	TP Sensor Signal
C1	22-24	—	Not Used
C1	25	ORG	Ignition Control "B"
C1	26	WHT	Ignition Control "A"
C1	27	—	Not Used
C1	28	RED	Transmission Range "C" Input
C1	29	BLK/WHT	PRNDL "A" Input
C1	30-32	—	Not Used
C1	33	DK BLU	Knock Sensor Signal
C1	34	—	Not Used
C1	35	PPL	TCC Brake Switch Input
C1	36	LT BLU	A/C Request Signal
C1	37-44	—	Not Used
C1	45	DK GRN	Fuel Tank Pressure Sensor Signal
C1	46	YEL/BLK	Transmission Fluid Temperature Sensor Signal
C1	47 & 48	—	Not Used
C1	49	RED/BLK	A/C Refrigerant Pressure Sensor Signal
C1	50 & 51	—	Not Used
C1	52	BLK	A/C Refrigerant Pressure Sensor Ground
C1	53	—	Not Used
C1	54	YEL	ECT Sensor Signal
C1	55	PPL	Fuel Level Sensor Input
C1	56	—	Not Used
C1	57	BLK	TP Sensor Ground
C1	58	YEL	Serial Data (Class 2)
C1	59	DK GRN	Serial Data (Class 2)
C1	60	BLK/WHT	PCM Ground
C1	61	PNK	IGN 2
C1	62	LT GRN	MAP Sensor Signal
C1	63	PPL/WHT	VSS High
C1	64-66	—	Not Used
C1	67	DK BLU	Transmission Range B Input
C1	68	PNK	Transmission Range "A" Input
C1	69	YEL	PRNDL "B"
C1	70	YEL/BLK	High Resolution Vehicle Speed Output
C1	71	(3) WHT	Fuel Composition/Temperature Signal
C1	72	GRY	PRNDL "C"
C1	73	WHT	PRNDL "P"
C1	74	RED	Generator Terminal "L"
C1	75	BLK	Fuel Injector No. 1 Control
C1	76	LT GRN/BLK	Fuel Injector No. 2 Control
C1	77-80	—	Not Used
C2	1-5	—	Not Used
C2	6	RED/BLK	Pressure Control Solenoid High Control
C2	7	—	Not Used
C2	8	DK GRN/WHT	Fuel Pump Relay Control
C2	9	LT BLU/WHT	Pressure Control Solenoid Low Control
C2	10	WHT	Tachometer Output
C2	11	(3) PPL	Fuel Composition Sensor Ground
C2	12 & 13	—	Not Used
C2	14	BLK/WHT	MAP Sensor Ground
C2	15	—	Not Used
C2	16	DK GRN/WHT	VSS Output (Cruise)
C2	17	DK GRN	VSS Output (Cluster)
C2	18 & 19	—	Not Used
C2	20	TAN	IAT Sensor Signal
C2	21	TAN	HO2S 1 Low
C2	22	PPL	HO2S 1 Signal
C2	23	TAN/WHT	HO2S 2 Low
C2	24	PPL/WHT	HO2S 2 Signal
C2	25 & 26	—	Not Used
C2	27	BRN	ECT Sensor Ground
C2	28	GRY	IAT Sensor Ground
C2	29	BLK	Transmission Fluid Temperature Sensor Ground
C2	30	—	Not Used
C2	31	RED/BLK	ICM Reference Low
C2	32	—	Not Used
C2	33	GRY	TP Sensor Reference Voltage
C2	34	GRY	A/C Refrigerant Pressure Sensor Reference Voltage
C2	35	GRY	MAP Sensor Reference Voltage
C2	36	RED	CMP Sensor Battery Voltage Supply
C2	37-44	—	Not Used
C2	45	(3) PPL	Cruise Disable/Fuel Level
C2	59	—	Not Used
C2	60	(3) BRN	AIR Pump Relay Control
C2	61	—	Not Used
C2	46	BRN/WHT	MIL Control
C2	47	—	Not Used
C2	48	LT BLU/BLK	Cruise Engaged Input
C2	49	—	Not Used
C2	50	TAN/BLK	TCC Solenoid Control
C2	51	YEL/BLK	2-3 Shift Solenoid Control
C2	52	WHT	3-2 Shift Solenoid Control
C2	53	LT GRN	1-2 Shift Solenoid Control
C2	54	—	Not Used
C2	55	DK GRN/WHT	A/C Compressor Clutch Relay Control
C2	56	DK GRN/WHT	EVAP Canister Purge Valve Control
C2	57	BRN	TCC PWM Solenoid Control
C2	58	WHT	EVAP Canister Vent Solenoid Control
C2	59-61	—	Not Used
C2	62	LT GRN/BLK	VSS Low
C2	63	PNK/BLK	CMP Sensor Ground
C2	64	BLK/WHT	PCM Ground
C2	65-70	—	Not Used
C2	71	LT BLU/WHT	IAC Coil "A" High
C2	72	LT GRN/WHT	IAC Coil "B" High
C2	73	LT GRN/BLK	IAC Coil "B" Low
C2	74	LT BLU/BLK	IAC Coil "A" Low
C2	75	LT BLU/BLK	Fuel Injector No. 4 Control
C2	76	PNK/BLK	Fuel Injector No. 3 Control
C2	77-80	—	Not Used
(1) (Scheme 2) (2) Fuel tank pressure sensor, fuel level sensor and fuel pump grounds. (3) Not used on gasoline only models.

(1)	(Scheme 2)

(2)	Fuel tank pressure sensor, fuel level sensor and fuel pump grounds.

(3)	Not used on gasoline only models.

POWERTRAIN CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (2.2L - VIN 4) (1)

Scheme 3

Scheme 3: Powertrain Control Module Harness Connector End View & Identification (3.4L)

Powertrain Control Module Connector Terminal Identification (3.4L)

Connector	Terminal No.	Wire Color	Function
C1	1	BLK	Sensor Ground
C1	2 & 3	—	Not Used
C1	4	LT GRN	Shift Solenoid "A" Control
C1	5	DK BLU	Cooling Fan High Speed Control
C1	6	DK GRN	Cooling Fan Low Speed Control
C1	7	BLK	CMP Sensor Input
C1	8	PPL/WHT	3X CKP Sensor Reference Signal
C1	9	LT BLU/BLK	24X CKP Sensor Reference Signal
C1	10	GRY	5-Volt Reference
C1	11 & 12	—	Not Used
C1	13	ORG/BLK	Sensor Ground
C1	14 & 15	—	Not Used
C1	16	BLK/WHT	PCM Ground
C1	17	YEL	IAT Sensor Ground
C1	18	—	Not Used
C1	19	PNK	Ignition Voltage
C1	20	ORG	Battery Voltage
C1	21	—	Not Used
C1	22	PNK	Transmission Fluid Pressure Switch "A" Input
C1	23-27	—	Not Used
C1	28	TAN/WHT	HO2S 2 Signal Low
C1	29	TAN	HO2S 1 Signal Low
C1	30	PPL	TCC Brake Switch
C1	31	BLK	EGR Valve Ground
C1	32	GRY	EGR Valve Control
C1	33	DK BLU	Knock Sensor Signal
C1	34 & 37	—	Not Used
C1	38	LT GRN/WHT	IAC "B" High
C1	39-42	—	Not Used
C1	43	BLK	Fuel Injector No. 1 Control
C1	44	YEL/BLK	Shift Solenoid "B" Control
C1	45	PNK/BLK	AIR Injection BL Valve Control
C1	46	PNK/BLK	Fuel Injector No. 3 Control
C1	47	LT GRN/BLK	Fuel Injector No. 2 Control
C1	48	RED/BLK	3X Reference Low
C1	49-52	—	Not Used
C1	53	TAN/BLK	By-Pass Ground
C1	54	WHT	Ignition Control
C1	55	DK GRN	VSS Signal Output
C1	56	BLK/WHT	PCM Ground
C1	57	BLK/WHT	PCM Ground
C1	58	—	Not Used
C1	59	DK GRN	Serial Data (Class 2)
C1	60	BLK/WHT	PCM Ground
C1	61	PPL	TP Sensor Ground
C1	62	DK BLU/WHT	AT/ISS Sensor Low
C1	63	RED/BLK	AT/ISS Sensor High
C1	64	YEL	VSS High
C1	65	PPL	VSS Low
C1	66 & 67	—	Not Used
C1	68	YEL	Transaxle Range Switch Input "B"
C1	69	YEL	MAF Signal
C1	70	—	Not Used
C1	71	ORG/BLK	Desired Torque
C1	72	DK GRN	Cruise Control Inhibit
C1	73	BLK/WHT	Fuel Injector No. 5 Control
C1	74 & 75	—	Not Used
C1	76	DK GRN/WHT	EVAP Canister Purge Control
C1	77 & 78	—	Not Used
C1	79	YEL/BLK	Fuel Injector No. 6 Control
C1	80	BLK	A/C Pressure Return
C2	1	—	Not Used
C2	2	WHT	EVAP Canister Vent Valve Control
C2	3	DK GRN/WHT	Fuel Pump Relay Control
C2	4	RED	EGR Valve Control
C2	5	BRN/WHT	MIL Control
C2	6	BRN/WHT	Low Oil Level Light Control
C2	7	LT BLU/WHT	Intake Air Control "A" High
C2	8	—	Not Used
C2	9	TAN/BLK	Delivered Torque
C2	10	PPL	HO2S 1 Signal High
C2	11	PPL/WHT	HO2S 2 Signal High
C2	12-15	—	Not Used
C2	16	WHT	Transaxle Range Parity
C2	17	RED	Transmission Fluid Pressure Switch Input "A"
C2	18	BLK/WHT	Transaxle Range Input "A"
C2	19	TAN/BLK	Oil Pressure Switch
C2	20-21	—	Not Used
C2	22	DK GRN/WHT	A/C Request Signal
C2	23	PPL	Crank
C2	24	PNK	Ignition Positive
C2	25	LT GRN	MAP Sensor Signal
C2	26	YEL	ECT Sensor Signal
C2	27	RED/BLK	A/C Refrigerant Pressure Sensor Signal
C2	28	BRN	EGR Pintle Position Signal
C2	29	—	Not Used
C2	30	GRY	5-Volt Reference
C2	31 & 32	—	Not Used
C2	33	GRY	Reference Voltage "A"
C2	34	GRY	Reference Voltage "B"
C2	35	ORG	Sensor Ground
C2	36-38	—	Not Used
C2	39	DK GRN/WHT	A/C Compressor Clutch Relay Control
C2	40 & 41	—	Not Used
C2	42	LT BLU/BLK	Fuel Injector No. 4 Control
C2	43	—	Not Used
C2	44	LT BLU/BLK	IAC Valve "A" Low
C2	45	RED/BLK	PC Solenoid Valve High
C2	46	LT BLU/BLK	PC Solenoid Valve Low
C2	47 & 48	—	Not Used
C2	49	LT GRN/BLK	IAC Valve "B" Low
C2	50	TAN	IAT Sensor Signal
C2	51-54	—	Not Used
C2	55	DK GRN	Fuel Tank Pressure Sensor Input
C2	56	GRY	Transaxle Range "C" Input
C2	57	DK BLU	Transmission Fluid Pressure Switch "B" Input
C2	58	BRN	Engine Oil Level Sensor Signal
C2	59	WHT	Cruise Engaged Input
C2	60	—	Not Used
C2	61	RED	Generator Control
C2	62	—	Not Used
C2	63	YEL	TCC Release Switch Input
C2	64 & 65	—	Not Used
C2	66	DK BLU	TP Sensor Signal
C2	67	—	Not Used
C2	68	YEL/BLK	Transmission Fluid Temperature Input
C2	69	PPL	Fuel Level Input
C2	70	LT GRN	CMP/CKP Sensor Ground
C2	71	—	Not Used
C2	72	RED/WHT	CMP/CKP Sensor Ignition Voltage
C2	73	BLK	CMP/CKP Sensor Ground
C2	74	YEL/BLK	CMP/CKP Sensor Ignition Voltage
C2	75	BRN	Air Pump Relay Control
C2	76	YEL/BLK	Crank Relay Control
C2	77	—	Not Used
C2	78	BRN	TCC PWM Solenoid Control
C2	79 & 80	—	Not Used
(1) (Scheme 3)

(1)	(Scheme 3)

POWERTRAIN CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (3.4L) (1)

Scheme 4

Scheme 4: Powertrain Control Module Harness Connector End View & Terminal Identification (4.3L, 4.8L, 5.0L, 5.

Powertrain Control Module Connector Terminal Identification (4.3L - ASTRO & SAFARI)

Connector	Terminal No.	Wire Color	Function
C1	1 & 2	—	Not Used
C1	3	BRN/WHT	1X CMP Sensor Signal
C1	4-6	—	Not Used
C1	7	TAN	HO2S 1 Bank 2 Low
C1	8	PNK/BLK	CMP Sensor Ground
C1	9	—	Not Used
C1	10	TAN/BLK	TCC Solenoid Control
C1	11 & 12	—	Not Used
C1	13	WHT	3-2 Shift Solenoid Valve Control
C1	14	—	Not Used
C1	15	YEL/BLK	VSS Output
C1	16-18	—	Not Used
C1	19	PPL/WHT	HO2S 1 Bank 1 High
C1	20	—	Not Used
C1	21	PPL	HO2S 1 Bank 2 High
C1	22	PPL/WHT	HO2S 3 Bank 1 High
C1	23 & 24	—	Not Used
C1	25	TAN/WHT	HO2S 1 Bank 1 Low
C1	26	TAN/WHT	HO2S 3 Bank 1 Low
C1	27	—	Not Used
C1	28	PPL	CKP Sensor Ground
C1	29	LT GRN/BLK	VSS Low
C1	30	PPL/WHT	VSS High
C1	31	YEL	3X CKP Sensor Signal
C1	32	—	Not Used
C2	1	—	Not Used
C2	2	WHT	EVAP Canister Vent Solenoid Control
C2	3	—	Not Used
C2	4	YEL/BLK	2-3 Shift Solenoid Valve Control
C2	5	—	Not Used
C2	6	LT GRN	1-2 Shift Solenoid Valve Control
C2	7	BRN	TCC PWM Solenoid Control
C2	8	BLK	Fuel Injector No. 1 Control
C2	9	YEL/BLK	Fuel Injector No. 6 Control
C2	10	BRN	EGR Pintle Position Signal
C2	11 & 12	—	Not Used
C2	13	LT GRN/WHT	IAC Coil "B" High
C2	14	LT BLU/WHT	IAC Coil "A" High
C2	15	LT GRN/BLK	Fuel Injector No. 2 Control
C2	16	PNK/BLK	Fuel Injector No. 3 Control
C2	17 & 18	—	Not Used
C2	19	DK BLU	Knock Sensor Signal
C2	20	—	Not Used
C2	21	LT GRN	MAP Sensor Signal
C2	22	TAN	IAT Sensor Signal
C2	23	YEL	ECT Sensor Signal
C2	24	DK BLU	TP Sensor Signal
C2	25	DK GRN	Fuel Tank Pressure Sensor Signal
C2	26	TAN/WHT	HO2S 1 Bank 1 Low
C2	27	YEL/BLK	Transmission Fluid Temperature Sensor Signal
C2	28	YEL	MAF Sensor Signal
C2	29	LT GRN/BLK	IAC Coil "B" Low
C2	30	LT BLU/BLK	IAC Coil "A" Low
C2	31	BLK/WHT	Fuel Injector No. 5 Control
C2	32	LT BLU/BLK	Fuel Injector No. 4 Control
C3	1	DK GRN/WHT	A/C Compressor Clutch Relay Control
C3	2	DK GRN/WHT	EVAP Canister Purge Solenoid Control
C3	3	—	Not Used
C3	4	BLK	Sensor Ground
C3	5	BRN	Generator Terminal "L"
C3	6	RED/BLK	Pressure Control Solenoid High
C3	7 & 8	—	Not Used
C3	9	WHT	IC Control
C3	10	—	Not Used
C3	11	RED	Transmission Range "C" Input
C3	12	GRY	Sensor Reference Voltage
C3	13	PPL/WHT	Fuel Level Sensor Signal
C3	14 & 15	—	Not Used
C3	16	LT BLU/WHT	Pressure Control Solenoid Low
C3	17	BLK/WHT	VCM Ground
C3	18	BLK/WHT	VCM Ground
C3	19	BLK	Sensor Ground
C3	20	—	Not Used
C3	21	ORG	Battery Voltage
C3	22	DK BLU	Transmission Range "B" Input
C3	23	PNK	Transmission Range "A" Input
C3	24	—	Not Used
C3	25	GRN/WHT	A/C Request Signal
C3	26	WHT	PRNDL "D"
C3	27	GRY	Reference Voltage
C3	28	GRY	PRNDL "C"
C3	29	—	Not Used
C3	30	DK GRN	A/C Cycling Switch Signal
C3	31	BLK/WHT	PRNDL "A"
C3	32	YEL	PRNDL "B"
C4	1	DK GRN/WHT	Fuel Pump Relay Control
C4	2	—	Not Used
C4	3	DK GRN/WHT	VSS Output
C4	4	DK GRN	VSS Output
C4	5	BRN/WHT	MIL Control
C4	6-9	—	Not Used
C4	10	PPL	Brake Switch Input
C4	11	PPL	Serial Data (Class 2)
C4	12	TAN/WHT	HO2S 3 Bank 1 Low
C4	13	BRN	Ignition Voltage
C4	14	YEL	Serial Data (Class 2)
C4	15	—	Not Used
C4	16	RED	EGR Valve Control
C4	17	PNK	Ignition Voltage
C4	18	PNK	Ignition Voltage
C4	19	—	Not Used
C4	20	WHT	EGR Valve Ground
C4	21-23	—	Not Used
C4	24	LT BLU/BLK	Cruise Engaged Input
(1) (Scheme 4)

(1)	(Scheme 4)

VEHICLE CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (4.3L - ASTRO & SAFARI) (1)

Powertrain Control Module Connector Terminal Identification (4.3L - BLAZER, BRAVADA, ENVOY, JIMMY, SONOMA & S10 PICKUP)

Connector	Terminal No.	Wire Color	Function
C1	1 & 2	—	Not Used
C1	3	BRN/WHT	1X CMP Sensor Signal
C1	4-6	—	Not Used
C1	7	TAN	HO2S 1 Bank 2 Low
C1	8	PNK/BLK	CMP Sensor Ground
C1	9	—	Not Used
C1	10	TAN/BLK	TCC Solenoid Control
C1	11 & 12	—	Not Used
C1	13	WHT	3-2 Shift Solenoid Control
C1	14	BRN	AIR Pump Relay Control
C1	15	YEL/BLK	VSS Output
C1	16-18	—	Not Used
C1	19	PPL/WHT	HO2S 1 Bank 1 High
C1	20	—	Not Used
C1	21	PPL	HO2S 1 Bank 2 High
C1	22	PPL/WHT	HO2S 3 Bank 1 High
C1	23 & 24	—	Not Used
C1	25	TAN/WHT	HO2S 1 Bank 1 Low
C1	26	TAN/WHT	HO2S 3 Bank 1 Low
C1	27	—	Not Used
C1	28	PPL	CKP Sensor Ground
C1	29	LT GRN/BLK	VSS Low
C1	30	PPL/WHT	VSS High
C1	31	YEL	3X CKP Sensor Signal
C1	32	—	Not Used
C2	1	—	Not Used
C2	2	WHT	EVAP Canister Vent Solenoid Control
C2	3	—	Not Used
C2	4	YEL/BLK	2-3 Shift Solenoid Control
C2	5	—	Not Used
C2	6	LT GRN	1-2 Shift Solenoid Control
C2	7	BRN	TCC PWM Solenoid Control
C2	8	BLK	Fuel Injector No. 1 Control
C2	9	YEL/BLK	Fuel Injector No. 6 Control
C2	10	BRN	EGR Pintle Position Signal
C2	11 & 12	—	Not Used
C2	13	LT GRN/WHT	IAC Coil "B" High
C2	14	LT BLU/WHT	IAC Coil "A" High
C2	15	LT GRN/BLK	Fuel Injector No. 2 Control
C2	16	PNK/BLK	Fuel Injector No. 3 Control
C2	17 & 18	—	Not Used
C2	19	DK BLU	Knock Sensor Signal
C2	20	WHT	Tachometer Output
C2	21	LT GRN	MAP Sensor Signal
C2	22	TAN	IAT Sensor Signal
C2	23	YEL	ECT Sensor Signal
C2	24	DK BLU	TP Sensor Signal
C2	25	DK GRN	Fuel Tank Pressure Sensor Signal
C2	26	—	Not Used
C2	27	YEL/BLK	Transmission Fluid Temperature Sensor Signal
C2	28	YEL	MAF Sensor Signal
C2	29	LT GRN/BLK	IAC Coil "B" Low
C2	30	LT BLU/BLK	IAC Coil "A" Low
C2	31	BLK/WHT	Fuel Injector No. 5 Control
C2	32	LT BLU/BLK	Fuel Injector No. 4 Control
C3	1	DK GRN/WHT	A/C Compressor Clutch Relay Control
C3	2	DK GRN/WHT	EVAP Canister Purge Solenoid Control
C3	3	—	Not Used
C3	4	BLK	Sensor Ground
C3	5	RED	Generator Terminal "L"
C3	6	RED/BLK	Pressure Control Solenoid High
C3	7 & 8	—	Not Used
C3	9	WHT	IC Control
C3	10	—	Not Used
C3	11	RED	Transmission Range "C" Input
C3	12	GRY	Sensor Reference Voltage
C3	13	PPL	Fuel Level Sensor Signal
C3	14 & 15	—	Not Used
C3	16	LT BLU/WHT	Pressure Control Solenoid Low
C3	17	BLK/WHT	VCM Ground
C3	18	BLK/WHT	VCM Ground
C3	19	BLK	Sensor Ground
C3	20	—	Not Used
C3	21	ORG	Battery Voltage
C3	22	DK BLU	Transmission Range "B" Input
C3	23	PNK	Transmission Range "A" Input
C3	24	—	Not Used
C3	25	GRN/WHT	A/C Request Signal
C3	26	WHT	PRNDL "D"
C3	27	GRY	Reference Voltage
C3	28	GRY	PRNDL "C"
C3	29	—	Not Used
C3	30	DK GRN	A/C Cycling Switch Signal
C3	31	BLK/WHT	PRNDL "A"
C3	32	YEL	PRNDL "B"
C4	1	DK GRN/WHT	Fuel Pump Relay Control
C4	2	—	Not Used
C4	3	DK GRN/WHT	VSS Output
C4	4	DK GRN	VSS Output
C4	5	BRN/WHT	MIL Control
C4	6-9	—	Not Used
C4	10	PPL	Brake Switch Input
C4	11	DK GRN	Serial Data (Class 2)
C4	12	—	Not Used
C4	13	BRN	Ignition Voltage
C4	14	YEL	Serial Data (Class 2)
C4	15	—	Not Used
C4	16	RED	EGR Valve Control
C4	17	PNK	Ignition Voltage
C4	18	PNK	Ignition Voltage
C4	19	BLK/WHT	4WD Engaged Input
C4	20	WHT	EGR Valve Ground
C4	21	—	Not Used
C4	22	GRY	CPP Switch Signal
C4	23	GRY/BLK	4WD Low Input
C4	24	LT BLU/BLK	Cruise Engaged Input
(1) (Scheme 4)

(1)	(Scheme 4)

VEHICLE CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (4.3L - BLAZER, BRAVADA, ENVOY, JIMMY, SONOMA & S10 PICKUP) (1)

Powertrain Control Module Connector Terminal Identification (4.3L - EXPRESS & SAVANA)

Connector	Terminal No.	Wire Color	Function
C1	1 & 2	—	Not Used
C1	3	BRN/WHT	1X CMP Sensor Signal
C1	4-6	—	Not Used
C1	7	TAN	HO2S 1 Bank 2 Low
C1	8	PNK/BLK	CMP Sensor Ground
C1	9	PPL	Fuel Level Output
C1	10	TAN/BLK	TCC Solenoid Control
C1	11 & 12	—	Not Used
C1	13	WHT	3-2 Shift Solenoid Valve Control
C1	14	BRN	Air Pump Relay Control
C1	15	YEL/BLK	VSS Output
C1	16-18	—	Not Used
C1	19	PPL/WHT	HO2S 1 Bank 1 High
C1	20	—	Not Used
C1	21	PPL	HO2S 1 Bank 2 High
C1	22	PPL/WHT	HO2S 3 Bank 1 High
C1	23 & 24	—	Not Used
C1	25	TAN/WHT	HO2S 1 Bank 1 Low
C1	26	TAN/WHT	HO2S 3 Bank 1 Low
C1	27	—	Not Used
C1	28	PPL	CKP Sensor Ground
C1	29	LT GRN/BLK	VSS Low
C1	30	PPL/WHT	VSS High
C1	31	YEL	3X CKP Sensor Signal
C1	32	—	Not Used
C2	1	—	Not Used
C2	2	WHT	EVAP Canister Vent Solenoid Control
C2	3	—	Not Used
C2	4	YEL/BLK	2-3 Shift Solenoid Valve Control
C2	5	—	Not Used
C2	6	LT GRN	1-2 Shift Solenoid Valve Control
C2	7	BRN	TCC PWM Solenoid Valve Control
C2	8	BLK	Fuel Injector No. 1 Control
C2	9	YEL/BLK	Fuel Injector No. 6 Control
C2	10	BRN	EGR Pintle Position Signal
C2	11 & 12	—	Not Used
C2	13	LT GRN/WHT	IAC Coil "B" High
C2	14	LT BLU/WHT	IAC Coil "A" High
C2	15	LT GRN/BLK	Fuel Injector No. 2 Control
C2	16	PNK/BLK	Fuel Injector No. 3 Control
C2	17 & 18	—	Not Used
C2	19	DK BLU	Knock Sensor Signal
C2	20	—	Not Used
C2	21	LT GRN	MAP Sensor Signal
C2	22	TAN	IAT Sensor Signal
C2	23	YEL	ECT Sensor Signal
C2	24	DK BLU	TP Sensor Signal
C2	25	DK GRN	Fuel Tank Pressure Sensor Signal
C2	26	—	Not Used
C2	27	YEL/BLK	Transmission Fluid Temperature Sensor Signal
C2	28	YEL	MAF Sensor Signal
C2	29	LT GRN/BLK	IAC Coil "B" Low
C2	30	LT BLU/BLK	IAC Coil "A" Low
C2	31	BLK/WHT	Fuel Injector No. 5 Control
C2	32	LT BLU/BLK	Fuel Injector No. 4 Control
C3	1	DK GRN/WHT	A/C Compressor Clutch Relay Control
C3	2	DK GRN/WHT	EVAP Canister Purge Solenoid Control
C3	3	—	Not Used
C3	4	BLK	Sensor Ground
C3	5	—	Not Used
C3	6	RED/BLK	Pressure Control Solenoid Valve High
C3	7 & 8	—	Not Used
C3	9	WHT	IC Control
C3	10	—	Not Used
C3	11	RED	Transmission Range "C" Input
C3	12	GRY	Sensor Reference Voltage
C3	13	PPL	Fuel Level Sensor Signal
C3	14 & 15	—	Not Used
C3	16	LT BLU/WHT	Pressure Control Solenoid Valve Low
C3	17	TAN/WHT	VCM Ground
C3	18	TAN/WHT	VCM Ground
C3	19	BLK	Sensor Ground
C3	20	—	Not Used
C3	21	ORG	Battery Voltage
C3	22	DK BLU	Transmission Range "B" Input
C3	23	PNK	Transmission Range "A" Input
C3	24	—	Not Used
C3	25	GRN/WHT	A/C Request Signal
C3	26	WHT	PRNDL "D"
C3	27	GRY	Reference Voltage
C3	28	GRY	PRNDL "C"
C3	29	—	Not Used
C3	30	DK GRN	A/C Cycling Switch Signal
C3	31	BLK/WHT	PRNDL "A"
C3	32	YEL	PRNDL "B"
C4	1	DK GRN/WHT	Fuel Pump Relay Control
C4	2	—	Not Used
C4	3	DK GRN/WHT	VSS Output
C4	4	DK GRN	VSS Output
C4	5	BRN/WHT	MIL Control
C4	6-9	—	Not Used
C4	10	PPL	Brake Switch Input
C4	11	PPL	Serial Data (Class 2)
C4	12	—	Not Used
C4	13	BRN	Ignition Voltage
C4	14 & 15	—	Not Used
C4	16	RED	EGR Valve Control
C4	17	—	Not Used
C4	18	PNK	Ignition Voltage
C4	19	—	Not Used
C4	20	WHT	EGR Valve Ground
C4	21-23	—	Not Used
C4	24	LT BLU/BLK	Cruise Engaged Input
(1) (Scheme 4)

(1)	(Scheme 4)

VEHICLE CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (4.3L - EXPRESS & SAVANA) (1)

Powertrain Control Module Connector Terminal Identification (4.3L - SIERRA & SILVERADO)

Connector	Terminal No.	Wire Color	Function
C1	1 & 2	—	Not Used
C1	3	BRN/WHT	1X CMP Sensor Signal
C1	4-6	—	Not Used
C1	7	TAN	HO2S 1 Bank 2 Low
C1	8	PNK/BLK	CMP Sensor Ground
C1	9	—	Not Used
C1	10	TAN/BLK	TCC Solenoid Control
C1	11 & 12	—	Not Used
C1	13	WHT	3-2 Shift Solenoid Valve Control
C1	14	BRN	Air Pump Relay Control
C1	15	YEL/BLK	VSS Output
C1	16-18	—	Not Used
C1	19	PPL/WHT	HO2S 1 Bank 1 High
C1	20	PPL	HO2S 2 Bank 2 High
C1	21	PPL	HO2S 1 Bank 2 High
C1	22	PPL/WHT	HO2S 2 Bank 1 High
C1	23	—	Not Used
C1	24	TAN	HO2S 2 Bank 2 Low
C1	25	TAN/WHT	HO2S 1 Bank 1 Low
C1	26	TAN/WHT	HO2S 2 Bank 1 Low
C1	27	—	Not Used
C1	28	PPL	CKP Sensor Ground
C1	29	LT GRN/BLK	VSS Low
C1	30	PPL/WHT	VSS High
C1	31	YEL	3X CKP Sensor Signal
C1	32	—	Not Used
C2	1	—	Not Used
C2	2	WHT	EVAP Canister Vent Solenoid Control
C2	3	—	Not Used
C2	4	YEL/BLK	2-3 Shift Solenoid Valve Control
C2	5	—	Not Used
C2	6	LT GRN	1-2 Shift Solenoid Valve Control
C2	7	BRN	TCC PWM Solenoid Valve Control
C2	8	BLK	Fuel Injector No. 1 Control
C2	9	YEL/BLK	Fuel Injector No. 6 Control
C2	10	BRN	EGR Pintle Position Signal
C2	11 & 12	—	Not Used
C2	13	LT GRN/WHT	IAC Coil "B" High
C2	14	LT BLU/WHT	IAC Coil "A" High
C2	15	LT GRN/BLK	Fuel Injector No. 2 Control
C2	16	PNK/BLK	Fuel Injector No. 3 Control
C2	17 & 18	—	Not Used
C2	19	DK BLU	Knock Sensor Signal
C2	20	WHT	Tachometer Output
C2	21	LT GRN	MAP Sensor Signal
C2	22	TAN	IAT Sensor Signal
C2	23	YEL	ECT Sensor Signal
C2	24	DK BLU	TP Sensor Signal
C2	25	DK GRN	Fuel Tank Pressure Sensor Signal
C2	26	—	Not Used
C2	27	YEL/BLK	Transmission Fluid Temperature Sensor Signal
C2	28	YEL	MAF Sensor Signal
C2	29	LT GRN/BLK	IAC Coil "B" Low
C2	30	LT BLU/BLK	IAC Coil "A" Low
C2	31	BLK/WHT	Fuel Injector No. 5 Control
C2	32	LT BLU/BLK	Fuel Injector No. 4 Control
C3	1	DK GRN/WHT	A/C Compressor Clutch Relay Control
C3	2	DK GRN/WHT	EVAP Canister Purge Solenoid Control
C3	3	—	Not Used
C3	4	BLK	Sensor Ground
C3	5	BRN	Generator Terminal L
C3	6	RED/BLK	Pressure Control Solenoid Valve High
C3	7 & 8	—	Not Used
C3	9	WHT	IC Control
C3	10	—	Not Used
C3	11	RED	Transmission Range "C" Input
C3	12	GRY	Sensor Reference Voltage
C3	13	PPL	Fuel Level Sensor Signal
C3	14	DK BLU	A/C Recirculation Signal
C3	15	—	Not Used
C3	16	LT BLU/WHT	Pressure Control Solenoid Valve Low
C3	17	BLK	VCM Ground
C3	18	BLK	VCM Ground
C3	19	BLK	Sensor Ground
C3	20	—	Not Used
C3	21	ORG	Battery Voltage
C3	22	DK BLU	Transmission Range "B" Input
C3	23	PNK	Transmission Range "A" Input
C3	24	LT GRN	Coolant Level Output
C3	25	GRN/WHT	A/C Request Signal
C3	26	WHT	PRNDL "D"
C3	27	GRY	Reference Voltage
C3	28	GRY	PRNDL "C"
C3	29	BRN	Oil Level Output
C3	30	DK GRN	A/C Cycling Switch Signal
C3	31	BLK/WHT	PRNDL "A"
C3	32	YEL	PRNDL "B"
C4	1	DK GRN/WHT	Fuel Pump Relay Control
C4	2	—	Not Used
C4	3	DK GRN/WHT	VSS Output
C4	4	DK GRN	VSS Output
C4	5	BRN/WHT	MIL Control
C4	6	—	Not Used
C4	7	DK GRN	Recirculation Door Motor Control
C4	8 & 9	—	Not Used
C4	10	PPL	Brake Switch Input
C4	11	PPL	Serial Data (Class 2)
C4	12	—	Not Used
C4	13	BRN	Ignition Voltage
C4	14	YEL	Serial Data (Class 2)
C4	15	—	Not Used
C4	16	RED	EGR Valve Control
C4	17	PNK	Ignition Voltage
C4	18	PNK	Ignition Voltage
C4	19	BLK/WHT	4WD Lock Input
C4	20	WHT	EGR Valve Ground
C4	21	—	Not Used
C4	22	GRY	CPP Switch Signal
C4	23	GRY/BLK	4WD Indicator Signal Input
C4	24	LT BLU/BLK	Cruise Engaged Input
(1) (Scheme 4)

(1)	(Scheme 4)

VEHICLE CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (4.3L - SIERRA & SILVERADO) (1)

Powertrain Control Module Connector Terminal Identification (4.8L, 5.3L & 6.0L)

Connector	Terminal No.	Wire Color	Function
C1	1	BLK/WHT	PCM Ground
C1	2	LT GRN	CKP Sensor Voltage Supply
C1	3	PNK/BLK	Fuel Injector No. 3 Control
C1	4	LT GRN/BLK	Fuel Injector No. 2 Control
C1	5-10	—	Not Used
C1	11	LT BLU	Knock Sensor Signal Rear
C1	12	DK BLU/WHT	CKP Sensor Signal
C1	13-16	—	Not Used
C1	17	DK BLU	Transmission Range Signal "B"
C1	18	RED	Transmission Range Signal "C"
C1	19	PNK	PCM Ignition Supply
C1	20	ORG	PCM Battery Supply
C1	21	YEL/BLK	CKP Sensor Ground
C1	22	—	Not Used
C1	23	PPL	Sensor Ground
C1	24	—	Not Used
C1	25	TAN	HO2S 2 Bank 2 Signal Low
C1	26	TAN	HO2S 1 Bank 2 Signal Low
C1	27	—	Not Used
C1	28	TAN/WHT	HO2S 2 Bank 1 Signal Low
C1	29	TAN/WHT	HO2S 1 Bank 1 Signal Low
C1	30	LT GRN	Engine Coolant Level Switch
C1	31	—	Not Used
C1	32	BLK/WHT	PRNDL "A"
C1	33	PPL	TCC Brake Switch
C1	34	WHT	PRNDL "P"
C1	35	GRY	Clutch Switch Signal
C1	36	BLK	Fuel Injector No. 1 Control
C1	37	YEL/BLK	Fuel Injector No. 6 Control
C1	38 & 39	—	Not Used
C1	40	BLK/WHT	PCM Ground
C1	41	BLK	Sensor Ground
C1	42	—	Not Used
C1	43	RED/BLK	Fuel Injector No. 7 Control
C1	44	LT BLU/BLK	Fuel Injector No. 4 Control
C1	45	GRY	Fuel Tank Pressure Sensor Reference Voltage
C1	46	GRY	TP Sensor Reference Voltage
C1	47	GRY	MAP Sensor Reference Voltage
C1	48	GRY	EGR Pintle Position Sensor Reference Voltage
C1	49 & 50	—	Not Used
C1	51	DK BLU	Knock Sensor Signal Front
C1	52	—	Not Used
C1	53	BLK	Fuel Tank Pressure Sensor Ground
C1	54	BLK	TP Sensor Ground
C1	55	BRN	EGR Pintle Position Sensor Signal
C1	56	—	Not Used
C1	57	ORG	PCM Battery Supply
C1	58	DK GRN	Serial Data
C1	59	YEL	Serial Data
C1	60	ORG/BLK	MAP Sensor Ground
C1	61	PNK/BLK	CMP Sensor Ground
C1	62	—	Not Used
C1	63	GRY	ECT Sensor Ground
C1	64	—	Not Used
C1	65	PPL	HO2S 2 Bank 2 Signal High
C1	66	PPL	HO2S 1 Bank 2 Signal High
C1	67	—	Not Used
C1	68	PPL/WHT	HO2S 2 Bank 1 Signal High
C1	69	PPL/WHT	HO2S 1 Bank 1 Signal High
C1	70	BRN	Low Oil Level Switch
C1	71	—	Not Used
C1	72	YEL	PRNDL "B"
C1	73	BRN/WHT	CMP Sensor Signal
C1	74	YEL	ECT Sensor Signal
C1	75	PNK	PCM Ignition Supply
C1	76	BLK/WHT	Fuel Injector No. 5 Control
C1	77	DK BLU/WHT	Fuel Injector No. 8 Control
C1	78	—	Not Used
C1	79	WHT	3-2 Shift Solenoid Control
C1	80	ORG/BLK	Fuel Level Sensor Ground
C2	1	BLK/WHT	PCM Ground
C2	2	BRN	TCC Control Solenoid
C2	3-5	—	Not Used
C2	6	RED/BLK	Transmission Fluid Pressure Control Solenoid High
C2	7	RED	EGR Solenoid Supply
C2	8	LT BLU/WHT	Transmission Fluid Pressure Control Solenoid Low
C2	9	DK GRN/WHT	Fuel Pump Relay Control
C2	10	WHT	Engine Speed (Tachometer) Output Signal
C2	11	DK BLU	Secondary A/C High Pressure Switch
C2	12	—	Not Used
C2	13	LT BLU/BLK	Cruise Control Engage Signal
C2	14	—	Not Used
C2	15	BRN	Generator Terminal "L"
C2	16	GRY/BLK	4WD Switch Signal Low
C2	17	DK GRN/WHT	A/C Request Signal
C2	18	—	Not Used
C2	19	BLK/WHT	4WD Front Axle Switch
C2	20	LT GRN/BLK	VSS Reference Low
C2	21	PPL/WHT	VSS Signal
C2	22	RED/BLK	VSS Signal (6.0L)
C2	23	DK BLU/WHT	VSS Reference Low (6.0L)
C2	24	DK BLU	TP Sensor Signal
C2	25	TAN	IAT Sensor Signal
C2	26	PPL	Ignition Control No. 1
C2	27	RED	Ignition Control No. 7
C2	28	LT BLU/WHT	Ignition Control No. 6
C2	29	DK GRN/WHT	Ignition Control No. 4
C2	30	—	Not Used
C2	31	YEL	MAF Sensor Signal
C2	32	LT GRN	MAP Sensor Signal
C2	33	DK GRN	HVAC Recirculation Door Control
C2	34	DK GRN/WHT	EVAP Canister Purge Solenoid Control
C2	35	—	Not Used
C2	36	BRN	AIR Pump Relay Control
C2	37 & 38	—	Not Used
C2	39	RED	CMP Sensor Voltage Supply
C2	40	BLK/WHT	PCM Ground
C2	41	WHT	EGR Solenoid Ground
C2	42	TAN/BLK	TCC Enable Circuit
C2	43	DK GRN/WHT	A/C Compressor Clutch Relay Control
C2	44	—	Not Used
C2	45	WHT	EVAP Canister Vent Valve Control
C2	46	BRN/WHT	MIL Control
C2	47	YEL/BLK	Transmission Shift Solenoid "B"
C2	48	LT GRN	Transmission Shift Solenoid "A"
C2	49	YEL/BLK	Vehicle Speed Output Circuit 128K
C2	50	DK GRN/WHT	Vehicle Speed Output Circuit 4K
C2	51	YEL/BLK	Transmission Temperature Sensor Signal
C2	52 & 53	—	Not Used
C2	54	PPL	Fuel Level Sensor Signal
C2	55	DK GRN	A/C Compressor Cycling Switch Signal
C2	56	—	Not Used
C2	57	BLK	IAT Sensor Ground
C2	58 & 59	—	Not Used
C2	60	BRN	IC Reference Low Bank 1
C2	61	BRN/WHT	IC Reference Low Bank 2
C2	62	GRY	PRNDL "C"
C2	63	PNK	Transmission Range Signal "A"
C2	64	DK GRN	Fuel Tank Pressure Sensor Signal
C2	65	—	Not Used
C2	66	PPL/WHT	Ignition Control No. 8
C2	67	RED/WHT	Ignition Control No. 2
C2	68	DK GRN	Ignition Control No. 5
C2	69	LT BLU	Ignition Control No. 3
C2	70-75	—	Not Used
C2	76	LT GRN/WHT	IAC Coil "B" High
C2	77	LT GRN/BLK	IAC Coil "B" Low
C2	78	LT BLU/BLK	IAC Coil "A" Low
C2	79	LT BLU/WHT	IAC Coil "A" High
C2	80	—	Not Used
(1) (Scheme 3)

(1)	(Scheme 3)

POWERTRAIN CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (4.8L, 5.3L & 6.0L) (1)

Powertrain Control Module Connector Terminal Identification (5.0L & 5.7L GASOLINE - ESCALADE, EXPRESS, SAVANA, PICKUP, TAHOE & YUKON)

Connector	Terminal No.	Wire Color	Function
C1	1 & 2	—	Not Used
C1	3	BRN/WHT	1X CMP Sensor Signal
C1	4-6	—	Not Used
C1	7	TAN	HO2S 1 Bank 2 Low
C1	8	PNK/BLK	CMP Sensor Ground
C1	9	PPL	Fuel Level Output
C1	10	TAN/BLK	TCC Solenoid Control
C1	11 & 12	—	Not Used
C1	13	WHT	3-2 Shift Solenoid Control
C1	14	BRN	AIR Pump Relay Control
C1	15	YEL/BLK	VSS Output
C1	16-18	—	Not Used
C1	19	PPL/WHT	HO2S 1 Bank 1 High
C1	20	PPL	HO2S 2 Bank 2 High (Under 8600 GVW); HO2S 2 Bank 1 High (Over 8600 GVW)
C1	21	PPL	HO2S 1 Bank 2 High
C1	22	PPL/WHT	HO2S 2 Bank 1 High (Under 8600 GVW); HO2S 2 Bank 2 High (Over 8600 GVW)
C1	23	—	Not Used
C1	24	TAN	HO2S 2 Bank 2 Low (Under 8600 GVW); HO2S 2 Bank 1 Low (Over 8600 GVW)
C1	25	TAN/WHT	HO2S 1 Bank 1 Low
C1	26	TAN/WHT	HO2S 2 Bank 1 Low (Under 8600 GVW); HO2S 2 Bank 2 Low (Over 8600 GVW)
C1	27	—	Not Used
C1	28	PPL	CKP Sensor Ground
C1	29	LT GRN/BLK	VSS Low
C1	30	PPL/WHT	VSS High
C1	31	YEL	4X CKP Sensor Signal
C1	32	—	Not Used
C2	1	—	Not Used
C2	2	WHT	EVAP Canister Vent Solenoid Control
C2	3	—	Not Used
C2	4	YEL/BLK	2-3 Shift Solenoid Control
C2	5	—	Not Used
C2	6	LT GRN	1-2 Shift Solenoid Control
C2	7	BRN	TCC PWM Solenoid Control
C2	8	BLK	Fuel Injector No. 1 Control
C2	9	DK BLU/WHT	Fuel Injector No. 8 Control
C2	10	BRN	EGR Pintle Position Signal
C2	11	LT GRN/BLK	Fuel Injector No. 2 Control
C2	12	RED/BLK	Fuel Injector No. 7 Control
C2	13	LT GRN/WHT	IAC Coil "B" High
C2	14	LT BLU/WHT	IAC Coil "A" High
C2	15	BLK/WHT	Fuel Injector No. 5 Control
C2	16	YEL/BLK	Fuel Injector No. 6 Control
C2	17 & 18	—	Not Used
C2	19	DK BLU	Knock Sensor Input
C2	20	—	Not Used
C2	21	LT GRN	MAP Sensor Signal
C2	22	TAN	IAT Sensor Signal
C2	23	YEL	ECT Sensor Signal
C2	24	DK BLU	TP Sensor Signal
C2	25	DK GRN	Fuel Tank Pressure Sensor Signal
C2	26	—	Not Used
C2	27	YEL/BLK	Transmission Fluid Temperature Sensor Signal (A/T)
C2	28	YEL	MAF Sensor Signal
C2	29	LT GRN/BLK	IAC Coil "B" Low
C2	30	LT BLU/BLK	IAC Coil "A" Low
C2	31	LT BLU/BLK	Fuel Injector No. 4 Control
C2	32	PNK/BLK	Fuel Injector No. 3 Control
C3	1	DK GRN/WHT	A/C Compressor Clutch Relay Control
C3	2	DK GRN/WHT	EVAP Canister Purge Solenoid Control
C3	3	—	Not Used
C3	4	BLK	Sensor Ground
C3	5	—	Not Used
C3	6	RED/BLK	Pressure Control Solenoid High
C3	7	DK BLU/WHT	Transmission Input Shaft Speed Sensor Low
C3	8	RED/BLK	Transmission Input Shaft Speed Sensor High
C3	9	WHT	IC Control
C3	10	—	Not Used
C3	11	RED	Transmission Range "C" Input
C3	12	GRY	Sensor Reference Voltage
C3	13	PPL/WHT	Fuel Level Sensor Signal
C3	14	DK BLU	A/C Recirculation Signal
C3	15	—	Not Used
C3	16	LT BLU/WHT	Pressure Control Solenoid Low
C3	17	BLK/WHT	PCM Ground
C3	18	BLK/WHT	PCM Ground
C3	19	BLK	Sensor Ground
C3	20	—	Not Used
C3	21	ORG	Battery Voltage
C3	22	DK BLU	Transmission Range "B" Input
C3	23	PNK	Transmission Range "A" Input
C3	24	—	Not Used
C3	25	DK GRN/WHT	A/C Request Signal
C3	26	—	Not Used
C3	27	GRY	Sensor Reference Voltage
C3	28 & 29	—	Not Used
C3	30	DK GRN	A/C Cycling Switch Signal
C3	31 & 32	—	Not Used
C4	1	DK GRN/WHT	Fuel Pump Relay Control
C4	2	—	Not Used
C4	3	DK GRN/WHT	VSS Output
C4	4	DK GRN	VSS Output
C4	5	BRN/WHT	MIL Control
C4	6	—	Not Used
C4	7	DK GRN	Recirculation Door Motor Control
C4	8	—	Not Used
C4	9	DK BLU	Auxiliary Fan
C4	10	PPL	Brake Switch Input
C4	11	PPL	Serial Data (Class 2)
C4	12	BLK	Dual Fuel Module Return
C4	13	BRN	Ignition Voltage
C4	14	—	Not Used
C4	15	TAN/BLK	Shift Light (M/T)
C4	16	RED	EGR Valve Control
C4	17	—	Not Used
C4	18	PNK	Ignition Voltage
C4	19	BLK/WHT	4WD Wheel Lock Input
C4	20	WHT	EGR Valve Ground
C4	21	—	Not Used
C4	22	BRN/WHT	CPP Switch Signal (M/T)
C4	23	GRY/BLK	4WD Indicator Signal Input
C4	24	LT BLU/BLK	Cruise Engaged Input
(1) (Scheme 4)

(1)	(Scheme 4)

VEHICLE CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (5.0L & 5.7L GASOLINE - ESCALADE, EXPRESS, SAVANA, PICKUP, TAHOE & YUKON) (1)

Powertrain Control Module Connector Terminal Identification (5.0L & 5.7L - EXPRESS & SAVANA)

Connector	Terminal No.	Wire Color	Function
C1	1 & 2	—	Not Used
C1	3	BRN/WHT	1X CMP Sensor Signal
C1	4-6	—	Not Used
C1	7	TAN	HO2S 1 Bank 2 Low
C1	8	PNK/BLK	CMP Sensor Ground
C1	9	PPL	Fuel Level Output
C1	10	TAN/BLK	TCC Solenoid Control
C1	11 & 12	—	Not Used
C1	13	WHT	3-2 Shift Solenoid Control
C1	14	—	Not Used
C1	15	YEL/BLK	VSS Output
C1	16-18	—	Not Used
C1	19	PPL/WHT	HO2S 1 Bank 1 High
C1	20	PPL	HO2S 3 Bank 1 High (5.0L); HO2S 2 Bank 1 High (5.7L)
C1	21	PPL	HO2S 1 Bank 2 High
C1	22	PPL/WHT	HO2S 2 Bank 2 High (5.7L)
C1	23	—	Not Used
C1	24	TAN	HO2S 3 Bank 1 Low (5.0L); HO2S 2 Bank 1 Low (5.7L)
C1	25	TAN/WHT	HO2S 1 Bank 1 Low
C1	26	TAN/WHT	HO2S 2 Bank 2 Low (5.7L)
C1	27	—	Not Used
C1	28	PPL	CKP Sensor Ground
C1	29	LT GRN/BLK	VSS Low
C1	30	PPL/WHT	VSS High
C1	31	YEL	4X CKP Sensor Signal
C1	32	—	Not Used
C2	1	—	Not Used
C2	2	WHT	EVAP Canister Vent Solenoid Control
C2	3	—	Not Used
C2	4	YEL/BLK	2-3 Shift Solenoid Control
C2	5	—	Not Used
C2	6	LT GRN	1-2 Shift Solenoid Control
C2	7	BRN	TCC PWM Solenoid Control
C2	8	BLK	Fuel Injector No. 1 Control
C2	9	DK BLU/WHT	Fuel Injector No. 8 Control
C2	10	BRN	EGR Pintle Position Signal
C2	11	LT GRN/BLK	Fuel Injector No. 2 Control
C2	12	RED/BLK	Fuel Injector No. 7 Control
C2	13	LT GRN/WHT	IAC Coil "B" High
C2	14	LT BLU/WHT	IAC Coil "A" High
C2	15	BLK/WHT	Fuel Injector No. 5 Control
C2	16	YEL/BLK	Fuel Injector No. 6 Control
C2	17 & 18	—	Not Used
C2	19	DK BLU	Knock Sensor Input
C2	20	—	Not Used
C2	21	LT GRN	MAP Sensor Signal
C2	22	TAN	IAT Sensor Signal
C2	23	YEL	ECT Sensor Signal
C2	24	DK BLU	TP Sensor Signal
C2	25	DK GRN	Fuel Tank Pressure Sensor Signal
C2	26	—	Not Used
C2	27	YEL/BLK	Transmission Fluid Temperature Sensor Signal
C2	28	YEL	MAF Sensor Signal
C2	29	LT GRN/BLK	IAC Coil "B" Low
C2	30	LT BLU/BLK	IAC Coil "A" Low
C2	31	LT BLU/BLK	Fuel Injector No. 4 Control
C2	32	PNK/BLK	Fuel Injector No. 3 Control
C3	1	DK GRN/WHT	A/C Compressor Clutch Relay Control
C3	2	DK GRN/WHT	EVAP Canister Purge Solenoid Control
C3	3	—	Not Used
C3	4	BLK	Sensor Ground
C3	5	—	Not Used
C3	6	RED/BLK	Pressure Control Solenoid High
C3	7	DK BLU/WHT	Transmission Input Shaft Speed Sensor Low
C3	8	RED/BLK	Transmission Input Shaft Speed Sensor High
C3	9	WHT	IC Control
C3	10	—	Not Used
C3	11	RED	Transmission Range "C" Input
C3	12	GRY	Sensor Reference Voltage
C3	13	PPL/WHT	Fuel Level Sensor Signal
C3	14 & 15	—	Not Used
C3	16	LT BLU/WHT	Pressure Control Solenoid Low
C3	17	BLK/WHT	VCM Ground
C3	18	BLK/WHT	VCM Ground
C3	19	BLK	Sensor Ground
C3	20	—	Not Used
C3	21	ORG	Battery Voltage
C3	22	DK BLU	Transmission Range "B" Input
C3	23	PNK	Transmission Range "A" Input
C3	24	—	Not Used
C3	25	DK GRN/WHT	A/C Request Signal
C3	26	—	Not Used
C3	27	GRY	Sensor Reference Voltage
C3	28 & 29	—	Not Used
C3	30	DK GRN	A/C Cycling Switch Signal
C3	31 & 32	—	Not Used
C4	1	DK GRN/WHT	Fuel Pump Relay Control
C4	2	—	Not Used
C4	3	DK GRN/WHT	VSS Output
C4	4	DK GRN	VSS Output
C4	5	BRN/WHT	MIL Control
C4	6-9	—	Not Used
C4	10	PPL	Brake Switch Input
C4	11	PPL	Serial Data (Class 2)
C4	12	—	Not Used
C4	13	BRN	Ignition Voltage
C4	14 & 15	—	Not Used
C4	16	RED	EGR Valve Control
C4	17	—	Not Used
C4	18	PNK	Ignition Voltage
C4	19	—	Not Used
C4	20	WHT	EGR Valve Ground
C4	21-23	—	Not Used
C4	24	LT BLU/BLK	Cruise Engaged Input
(1) (Scheme 4)

(1)	(Scheme 4)

VEHICLE CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (5.0L & 5.7L - EXPRESS & SAVANA) (1)

Powertrain Control Module Connector Terminal Identification (5.7L CNG - PICKUP)

Connector	Terminal No.	Wire Color	Function
C1	1	PPL	Serial Data (Class 2)
C1	2	BRN	MIL Control
C1	3	PNK	Natural Gas Operation Enable
C1	4	—	Not Used
C1	5	WHT	Production Use Serial Data
C1	6 & 7	—	Not Used
C1	8	TAN/WHT	Fuel Level (CNG) Output
C1	9	DK BLU	Desired Gas Flow Output
C1	10	DK GRN	Production Use Serial Data
C1	11	—	Not Used
C1	12	YEL	ECT Sensor Input
C1	13	TAN	IAT Sensor Input
C1	14	LT GRN	MAP Sensor Input
C1	15	DK GRN	4X VSS Input
C1	16	—	Not Used
C1	17	YEL	MAF Sensor Input
C1	18	YEL/BLK	4X CKP Sensor Input
C1	19	PNK	Actual Gas Flow
C1	20	BRN/WHT	1X CMP Sensor Input
C1	21	—	Not Used
C1	22	BRN/WHT	MIL Input
C1	23	BRN	Fuel Temp Sensor Input (CNG)
C1	24	GRY	Fuel Pressure Sensor Input (CNG)
C1	25	—	Not Used
C1	26	BRN	EGR Pintle Position Sensor Input
C1	27	DK BLU	TP Sensor Input
C1	28	BLK	Sensor Ground
C1	29	GRY	Sensor Reference Voltage
C1	30	BRN	Fuel Pump Relay Control (Turns Off Gasoline)
C1	31	PPL	Fuel Indicator Control
C1	32	GRY	Fuel Gauge Relay Control
C2	1	LT BLU	Low Pressure Lock-Off Control
C2	2	—	Not Used
C2	3	LT GRN	High Pressure Lock-Off Control
C2	4	PPL	HO2S 1 Bank 2 High
C2	5	TAN	HO2S 1 Bank 2 Low
C2	6	PPL/WHT	HO2S 1 Bank 1 High
C2	7	TAN/WHT	HO2S 1 Bank 1 Low
C2	8-13	—	Not Used
C2	14	BRN	Fuel Gauge Select Switch Input
C2	15	PNK	AF ECU Ignition Power
C2	16	ORG	AF ECU Battery Power
C2	17	—	Not Used
C2	18	ORG	Fuel Pressure Sensor Reference Voltage
C2	19	DK BLU	Sensor Ground
C2	20	BLK	Production Use Serial Data
C2	21	BLK	AF ECU Ground
C2	22	BLK	AF ECU Ground
C2	23	BLK	AF ECU Ground
C2	24	BLK	AF ECU Ground
C2	25-31	—	Not Used
C2	32	RED	Production Use Serial Data
(1) Refer to connectors C1 and C2. (Scheme 4)

(1)	Refer to connectors C1 and C2. (Scheme 4)

ALTERNATIVE FUEL ENGINE CONTROL UNIT CONNECTOR TERMINAL IDENTIFICATION (5.7L CNG - PICKUP) (1)

Powertrain Control Module Connector Terminal Identification (7.4L - EXPRESS & SAVANA)

Connector	Terminal No.	Wire Color	Function
C1	1 & 2	—	Not Used
C1	3	BRN/WHT	1X CMP Sensor Signal
C1	4-6	—	Not Used
C1	7	TAN	HO2S 1 Bank 2 Low
C1	8	PNK/BLK	CMP Low
C1	9	PPL	Fuel Gauge
C1	10-13	—	Not Used
C1	14	BRN	AIR Relay Control (Calif. Only)
C1	15	YEL/BLK	VSS Signal
C1	16 & 17	—	Not Used
C1	18	PPL/WHT	Dual Tank Fuel Module
C1	19	PPL/WHT	HO2S 1 Bank 1 High
C1	20	PPL/WHT	HO2S 2 Bank 2 High
C1	21	PPL	HO2S 1 Bank 2 High
C1	22	PPL/WHT	HO2S 3 Bank 1 High
C1	23	—	Not Used
C1	24	TAN/WHT	HO2S 2 Bank 2 Low
C1	25	TAN/WHT	HO2S 1 Bank 1 Low
C1	26	TAN	HO2S 3 Bank 1 Low
C1	27	—	Not Used
C1	28	PPL	CKP Sensor Low
C1	29	LT GRN/BLK	VSS Low
C1	30	PPL/WHT	VSS Signal
C1	31	YEL	4X CKP Sensor Signal
C1	32	—	Not Used
C2	1	—	Not Used
C2	2	WHT	EVAP Canister Vent Solenoid Control
C2	3	—	Not Used
C2	4	YEL/BLK	2-3 Shift Solenoid Control
C2	5	—	Not Used
C2	6	LT GRN	1-2 Shift Solenoid Control
C2	7	BRN	TCC PWM Solenoid Control
C2	8	BLK	Fuel Injector No. 1 Control
C2	9	DK BLU/WHT	Fuel Injector No. 8 Control
C2	10	BRN	EGR Pintle Position Signal
C2	11	LT GRN/BLK	Fuel Injector No. 2 Control
C2	12	RED/BLK	Fuel Injector No. 7 Control
C2	13	LT GRN/WHT	IAC Coil "B" High
C2	14	LT BLU/WHT	IAC Coil "A" High
C2	15	BLK/WHT	Fuel Injector No. 5 Control
C2	16	YEL/BLK	Fuel Injector No. 6 Control
C2	17 & 18	—	Not Used
C2	19	DK BLU	Knock Sensor Signal
C2	20	—	Not Used
C2	21	LT GRN	MAP Sensor Signal
C2	22	TAN	IAT Sensor Signal
C2	23	YEL	ECT Sensor Signal
C2	24	DK BLU	TP Sensor Signal
C2	25	DK GRN	Fuel Tank Vacuum Sensor Signal
C2	26	—	Not Used
C2	27	YEL/BLK	Transmission Fluid Temperature Sensor Signal
C2	28	YEL	MAF Sensor Signal
C2	29	LT GRN/BLK	IAC High
C2	30	LT BLU/BLK	IAC Low
C2	31	LT BLU/BLK	Fuel Injector No. 4 Control
C2	32	PNK/BLK	Fuel Injector No. 3 Control
C3	1	DK GRN/WHT	A/C Compressor Clutch Relay Control
C3	2	DK GRN/WHT	EVAP Canister Purge Solenoid Control
C3	3	—	Not Used
C3	4	BLK	ECT/TP Sensor Ground
C3	5	—	Not Used
C3	6	RED/BLK	Pressure Control Solenoid High
C3	7	DK BLU/WHT	Input Shaft Speed Sensor Low
C3	8	RED/BLK	Input Shaft Speed Sensor High
C3	9	WHT	IC Control
C3	10	—	Not Used
C3	11	RED	Transmission Range "C" Input
C3	12	GRY	TP Sensor Reference Voltage
C3	13	PPL	Fuel Level Signal
C3	14	DK BLU	A/C Recirculation
C3	15	—	Not Used
C3	16	LT BLU/WHT	Pressure Control Solenoid Low
C3	17	TAN/WHT	VCM Ground
C3	18	BLK/WHT	VCM Ground
C3	19	BLK	Sensor Ground (IAT/MAP/EGR)
C3	20	—	Not Used
C3	21	ORG	Battery Voltage
C3	22	DK BLU	Transmission Range "B" Input
C3	23	PNK	Transmission Range "A" Input
C3	24	—	Not Used
C3	25	DK GRN/WHT	A/C Request Signal
C3	26	—	Not Used
C3	27	GRY	Reference Voltage (EGR/MAP)
C3	28 & 29	—	Not Used
C3	30	DK GRN	A/C Compressor Cycling Switch Signal
C3	31 & 32	—	Not Used
C4	1	DK GRN/WHT	Fuel Pump Relay Control
C4	2	—	Not Used
C4	3	DK GRN/WHT	VSS Output Signal (TCC/Radio/Cruise Control)
C4	4	DK GRN	VSS Output Signal (Speedometer)
C4	5	BRN/WHT	MIL Control
C4	6	—	Not Used
C4	7	DL GRN	Inlet Air Actuator
C4	8 & 9	—	Not Used
C4	10	PPL	Brake Signal
C4	11	PPL	Serial Data (Class 2)
C4	12	BLK	Dual Fuel Module Return
C4	13	BRN	Ignition Voltage
C4	14 & 15	—	Not Used
C4	16	RED	EGR Valve Feed
C4	17	—	Not Used
C4	18	PNK	Ignition Voltage
C4	19	—	Not Used
C4	20	WHT	EGR Valve Control
C4	21-23	—	Not Used
C4	24	LT BLU/BLK	Cruise Engaged Signal
(1) (Scheme 4)

(1)	(Scheme 4)

POWERTRAIN CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (7.4L - EXPRESS & SAVANA) (1)

Powertrain Control Module Connector Terminal Identification (7.4L - PICKUP)

Connector	Terminal No.	Wire Color	Function
C1	1 & 2	—	Not Used
C1	3	BRN/WHT	1X CMP Sensor Signal
C1	4-6	—	Not Used
C1	7	TAN	HO2S 1 Bank 2 Low
C1	8	PNK/BLK	CMP Sensor Low
C1	9	PPL	Fuel Gauge
C1	10-13	—	Not Used
C1	14	BRN	AIR Relay Control (Calif. Only)
C1	15	YEL/BLK	VSS Signal
C1	16 & 17	—	Not Used
C1	18	PPL/WHT	Dual Tank Fuel Module
C1	19	PPL/WHT	HO2S 1 Bank 1 High
C1	20	PPL	HO2S 2 Bank 1 High
C1	21	PPL	HO2S 1 Bank 2 High
C1	22	PPL/WHT	HO2S 2 Bank 2 High
C1	23	TAN	HO2S Low Reference
C1	24	TAN	HO2S 2 Bank 1 Low
C1	25	TAN/WHT	HO2S 1 Bank 1 Low
C1	26	TAN/WHT	HO2S 2 Bank 2 Low
C1	27	—	Not Used
C1	28	PPL	CKP Sensor Low
C1	29	LT GRN/BLK	VSS Low
C1	30	PPL/WHT	VSS Signal
C1	31	YEL	4X CKP Sensor Signal
C1	32	—	Not Used
C2	1	—	Not Used
C2	2	WHT	EVAP Canister Vent Solenoid Control
C2	3	—	Not Used
C2	4	YEL/BLK	2-3 Shift Solenoid Control
C2	5	—	Not Used
C2	6	LT GRN	1-2 Shift Solenoid Control
C2	7	BRN	TCC PWM Solenoid Control
C2	8	BLK	Fuel Injector No. 1 Control
C2	9	DK BLU/WHT	Fuel Injector No. 8 Control
C2	10	BRN	EGR Pintle Position Signal
C2	11	LT GRN/BLK	Fuel Injector No. 2 Control
C2	12	RED/BLK	Fuel Injector No. 7 Control
C2	13	LT GRN/WHT	IAC Coil "B" High
C2	14	LT BLU/WHT	IAC Coil "A" High
C2	15	BLK/WHT	Fuel Injector No. 5 Control
C2	16	YEL/BLK	Fuel Injector No. 6 Control
C2	17 & 18	—	Not Used
C2	19	DK BLU	Knock Sensor Signal
C2	20	—	Not Used
C2	21	LT GRN	MAP Sensor Signal
C2	22	TAN	IAT Sensor Signal
C2	23	YEL	ECT Sensor Signal
C2	24	DK BLU	TP Sensor Signal
C2	25	DK GRN	Fuel Tank Vacuum Sensor Signal
C2	26	—	Not Used
C2	27	YEL/BLK	Transmission Fluid Temperature Sensor Signal
C2	28	YEL	MAF Sensor Signal
C2	29	LT GRN/BLK	IAC High
C2	30	LT BLU/BLK	IAC Low
C2	31	LT BLU/BLK	Fuel Injector No. 4 Control
C2	32	PNK/BLK	Fuel Injector No. 3 Control
C3	1	DK GRN/WHT	A/C Compressor Clutch Relay Control
C3	2	DK GRN/WHT	EVAP Canister Purge Solenoid Control
C3	3	—	Not Used
C3	4	BLK	ECT/TP Sensor Ground
C3	5	—	Not Used
C3	6	RED/BLK	Pressure Control Solenoid High
C3	7	DK BLU/WHT	Input Shaft Speed Sensor Low
C3	8	RED/BLK	Input Shaft Speed Sensor High
C3	9	WHT	IC Control
C3	10	—	Not Used
C3	11	RED	Transmission Range "C" Input
C3	12	GRY	TP Sensor Reference Voltage
C3	13	PPL/WHT	Fuel Level Signal
C3	14	DK BLU	A/C Recirculation
C3	15	—	Not Used
C3	16	LT BLU/WHT	Pressure Control Solenoid Low
C3	17	BLK/WHT	PCM Ground
C3	18	BLK/WHT	PCM Ground
C3	19	BLK	Sensor Ground (IAT/MAP/EGR)
C3	20	—	Not Used
C3	21	ORG	Battery Voltage
C3	22	DK BLU	Transmission Range "B" Input
C3	23	PNK	Transmission Range "A" Input
C3	24	—	Not Used
C3	25	DK GRN/WHT	A/C Request Signal
C3	26	—	Not Used
C3	27	GRY	Reference Voltage (EGR/MAP)
C3	28 & 29	—	Not Used
C3	30	DK GRN	A/C Compressor Cycling Switch Signal
C3	31 & 32	—	Not Used
C4	1	DK GRN/WHT	Fuel Pump Relay Control
C4	2	—	Not Used
C4	3	DK GRN/WHT	VSS Output Signal (TCC/Radio/Cruise Control)
C4	4	DK GRN	VSS Output Signal (Speedometer)
C4	5	BRN/WHT	MIL Control
C4	6	—	Not Used
C4	7	DK GRN	Recirculation Door Motor Signal
C4	8	—	Not Used
C4	9	DK BLU	Auxiliary Cooling Fan Relay Control
C4	10	PPL	Brake Signal
C4	11	PPL	Serial Data (Class 2)
C4	12	BLK	Dual Fuel Module Return
C4	13	BRN	Ignition Voltage
C4	14 & 15	—	Not Used
C4	16	RED	EGR Valve Feed
C4	17	—	Not Used
C4	18	PNK	Ignition Voltage
C4	19	BLK/WHT	4WD Engaged Signal
C4	20	WHT	EGR Valve Control
C4	21	—	Not Used
C4	22	BRN/WHT	CPP Switch Signal
C4	23	GRY/BLK	4WD Low Signal
C4	24	LT BLU/BLK	Cruise Engaged Signal
(1) (Scheme 4)

(1)	(Scheme 4)

VEHICLE CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (7.4L - PICKUP) (1)

Scheme 5

Scheme 5: Powertrain Control Module Harness Connector End View & Terminal Identification (6.5L)

Powertrain Control Module Connector Terminal Identification (6.5L - EXPRESS & SAVANA)

Connector	Terminal No.	Wire Color	Function
C1	C1	PPL	CKP Sensor Ground
C1	C2	DK GRN/WHT	A/C Request Signal
C1	C3	—	Not Used
C1	C4	TAN	IAT Sensor Signal
C1	C5	LT BLU	Accelerator Pedal Position No. 2 Signal
C1	C6	YEL	Glow Plug Relay Control
C1	C7	RED/BLK	Pressure Control Solenoid Valve High
C1	C8	YEL	Fuel Temperature Signal
C1	C9	YEL/BLK	Transmission Fluid Temperature Sensor
C1	C10	—	Not Used
C1	C11	YEL	ECT Sensor Signal
C1	C12	—	Not Used
C1	C13	RED	Closure Signal
C1	C14	LT GRN	Boost Sensor Signal
C1	C15	LT BLU/WHT	Pressure Control Solenoid Valve Low
C1	C16	—	Not Used
C1	D1	BLU/WHT	Transmission Input Speed Signal Low
C1	D2	—	Not Used
C1	D3	YEL/BLK	Accelerator Pedal Position No. 3 Reference Voltage
C1	D4	DK GRN	Accelerator Pedal Position No. 3 Signal
C1	D5	GRY	Fuel Lift Pump Signal
C1	D6	GRY	Accelerator Pedal Position No. 3 Ground
C1	D7	LT BLU	Glow Plug Signal
C1	D8	DK GRN/WHT	Fuel Lift Pump Control
C1	D9	PNK/BLK	Sensor Ground (Pump CAM, High Res. & Fuel Temp.)
C1	D10	GRY/BLK	Cruise Resume/Accel Signal
C1	D11	RED/BLK	Transmission Input Speed Signal High
C1	D12	WHT/BLK	Accelerator Pedal Position No. 1 Reference Voltage
C1	D13	GRY	Sensor Reference Voltage (Boost & CKP)
C1	D14	GRY	Sensor Reference Voltage (Pump CAM & High Res.)
C1	D15 & D16	—	Not Used
C2	A1	BLK	Closure Ground
C2	A2	ORG	High Res. Signal
C2	A3	BRN	Transmission Output Speed Signal
C2	A4	BRN/WHT	Pump CAM Sensor Signal
C2	A5	YEL	CKP Sensor Signal
C2	A6	DK GRN	VSS Signal
C2	A7	RED/BLK	Injection Timing Stepper Motor High
C2	A8	TAN/BLK	Injection Timing Stepper Motor Low
C2	A9	ORG/BLK	Injection Timing Stepper Motor Low
C2	A10	YEL/BLK	Injection Timing Stepper Motor High
C2	A11	GRY	Cruise Control On/Off Signal
C2	A12	PPL	Accelerator Pedal Position No. 2 Ground
C2	B1	BRN	Accelerator Pedal Position No. 1 Ground
C2	B2	DK BLU	Accelerator Pedal Position No. 1 Signal
C2	B3	—	Not Used
C2	B4	RED	TR Switch "C" Input
C2	B5	DK BLU	TR Switch "B" Input
C2	B6	PNK	TR Switch "A" Input
C2	B7 & B8	—	Not Used
C2	B9	PPL	Brake Switch Signal
C2	B10	WHT	Brake Switch Signal
C2	B11	DK BLU	Cruise Set/Coast Signal
C2	B12	BLK	Sensor Ground (Boost, ECT, IAT & TFT)
C3	C1	—	Not Used
C3	C2	TAN	Accelerator Pedal Position No. 2 Reference Voltage
C3	C3	—	Not Used
C3	C4	LT GRN	1-2 Shift Solenoid Signal
C3	C5	BRN	TCC PWM Solenoid Signal
C3	C6	YEL/BLK	1-2 Shift Solenoid Signal
C3	C7	DK BLU	Wait To Start Light Control
C3	C8	PPL	Class 2 Communication
C3	C9 & C10	—	Not Used
C3	C11	PNK	Ignition Voltage
C3	C12	PNK	Ignition Voltage
C3	C13	ORG	Battery Voltage
C3	C14	BRN/WHT	MIL Control
C3	C15	DK BLU/WHT	Engine Shutoff Control
C3	C16	—	Not Used
C3	D1 & D2	—	Not Used
C3	D3	LT GRN	Fuel Injection Control
C3	D4	—	Not Used
C3	D5	DK GRN/WHT	A/C Enable Signal
C3	D6	BLK/WHT	PCM Ground
C3	D7	TAN/WHT	PCM Ground
C3	D8-D10	—	Not Used
C3	D11	WHT/BLK	Service Throttle Soon Light Control
C3	D12	—	Not Used
C3	D13	ORG	Battery Voltage
C3	D14	YEL	Wastegate Solenoid Control
C3	D15	DK BLU/WHT	Engine Shutoff Solenoid Control
C3	D16	—	Not Used
(1) (Scheme 5)

(1)	(Scheme 5)

POWERTRAIN CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (6.5L - EXPRESS & SAVANA) (1)

Powertrain Control Module Connector Terminal Identification (6.5l - PICKUP)

Connector	Terminal No.	Wire Color	Function
C1	C1	—	Not Used
C1	C2	DK GRN/WHT	A/C Request Signal
C1	C3	—	Not Used
C1	C4	TAN	IAT Sensor Signal
C1	C5	LT BLU	Accelerator Pedal Position No. 2 Signal
C1	C6	YEL	Glow Plug Relay Control
C1	C7	RED/BLK	Pressure Control Solenoid Valve High
C1	C8	YEL	Fuel Temperature Signal
C1	C9	YEL/BLK	Transmission Fluid Temperature Sensor
C1	C10	—	Not Used
C1	C11	YEL	ECT Sensor Signal
C1	C12	—	Not Used
C1	C13	RED	Closure Signal
C1	C14	LT GRN	Boost Sensor Signal
C1	C15	LT BLU/WHT	Pressure Control Solenoid Valve Low
C1	C16	—	Not Used
C1	D1	BLU/WHT	Transmission Input Speed Signal Low
C1	D2	GRY/BLK	4WD Low Signal
C1	D3	YEL/BLK	Accelerator Pedal Position No. 3 Reference Voltage
C1	D4	DK GRN	Accelerator Pedal Position No. 3 Signal
C1	D5	GRY	Fuel Lift Pump Signal
C1	D6	GRY	Accelerator Pedal Position No. 3 Ground
C1	D7	BRN	Glow Plug Signal
C1	D8	DK GRN/WHT	Fuel Lift Pump Control
C1	D9	PNK/BLK	Sensor Ground (Pump CAM, High Res. & Fuel Temp.)
C1	D10	GRY/BLK	Cruise Resume/Accel Signal
C1	D11	RED/BLK	Transmission Input Speed Signal
C1	D12	WHT/BLK	Accelerator Pedal Position No. 1 Reference Voltage
C1	D13	GRY	Sensor Reference Voltage (Boost, CKP & EGR)
C1	D14	GRY	Sensor Reference Voltage (Pump CAM & High Res.)
C1	D15 & D16	—	Not Used
C2	A1	BLK	Closure Ground
C2	A2	ORG	High Res. Signal
C2	A3	BRN	Transmission OSS Signal
C2	A4	BRN/WHT	Pump CAM Sensor Signal
C2	A5	YEL	CKP Sensor Signal
C2	A6	DK GRN	VSS Signal
C2	A7	RED/BLK	Injection Timing Stepper Motor High Coil No. 1
C2	A8	TAN/BLK	Injection Timing Stepper Motor Low Coil No. 1
C2	A9	ORG/BLK	Injection Timing Stepper Motor Low Coil No. 2
C2	A10	YEL/BLK	Injection Timing Stepper Motor High Coil No. 2
C2	A11	GRY	Cruise Control On/Off Signal
C2	A12	PPL	Accelerator Pedal Position No. 2 Ground
C2	B1	BRN	Accelerator Pedal Position No. 1 Ground
C2	B2	DK BLU	Accelerator Pedal Position No. 1 Signal
C2	B3	BLK/WHT	Front Axle Switch Signal
C2	B4	RED	Transmission Range Switch "C" Input
C2	B5	DK BLU	Transmission Range Switch "B" Input
C2	B6	PNK	Transmission Range Switch "A" Input
C2	B7 & B8	—	Not Used
C2	B9	PPL (A/T)	Cruise Control Brake Switch Signal (A/T)
C2	B9	BRN/WHT (M/T)	Brake/Clutch Pedal Position Switch Signal (M/T)
C2	B10	WHT	Brake Switch Signal
C2	B11	DK BLU	Cruise Set/Coast Signal
C2	B12	BLK	Sensor Ground (Boost, EGR, ECT, IAT, Fuel Temp., TFT & CKP)
C3	C1	—	Not Used
C3	C2	TAN	Accelerator Pedal Position No. 2 Reference Voltage
C3	C3	LT GRN	Fuel Injection Control
C3	C4	LT GRN	1-2 Shift Solenoid Signal
C3	C5	BRN	TCC PWM Solenoid Signal
C3	C6	YEL/BLK	2-3 Shift Solenoid Signal
C3	C7	DK BLU	Wait To Start Light Control
C3	C8	PPL	Class 2 Communication
C3	C9 & C10	—	Not Used
C3	C11	PNK	Ignition Voltage
C3	C12	PNK	Ignition Voltage
C3	C13	ORG	Battery Voltage
C3	C14	BRN/WHT	MIL Control
C3	C15 & 16	—	Not Used
C3	D1 & D2	—	Not Used
C3	D3	LT GRN/BLK	Fuel Injection Control
C3	D4	—	Not Used
C3	D5	DK GRN/WHT	A/C Enable Signal
C3	D6	BLK/WHT	PCM Ground
C3	D7	TAN/WHT	PCM Ground
C3	D8-D10	—	Not Used
C3	D11	WHT/BLK	Service Throttle Soon Light Control
C3	D12	—	Not Used
C3	D13	ORG	Battery Voltage
C3	D14	YEL	Wastegate Solenoid Control
C3	D15	DK BLU/WHT	Engine Shutoff Solenoid Control
C3	D16	—	Not Used
(1) (Scheme 5)

(1)	(Scheme 5)

POWERTRAIN CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (6.5L - PICKUP) (1)

Engine Controls - System & Component Tests: Overview Chevrolet Venture I

MODEL IDENTIFICATION

POWERTRAIN CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION

Scheme 2

Powertrain Control Module Connector Terminal Identification (2.2L - VIN 4)

Scheme 3

Powertrain Control Module Connector Terminal Identification (3.4L)

Scheme 4

Powertrain Control Module Connector Terminal Identification (4.3L - ASTRO & SAFARI)

Powertrain Control Module Connector Terminal Identification (4.3L - BLAZER, BRAVADA, ENVOY, JIMMY, SONOMA & S10 PICKUP)

Powertrain Control Module Connector Terminal Identification (4.3L - EXPRESS & SAVANA)

Powertrain Control Module Connector Terminal Identification (4.3L - SIERRA & SILVERADO)

Powertrain Control Module Connector Terminal Identification (4.8L, 5.3L & 6.0L)

Powertrain Control Module Connector Terminal Identification (5.0L & 5.7L GASOLINE - ESCALADE, EXPRESS, SAVANA, PICKUP, TAHOE & YUKON)

Powertrain Control Module Connector Terminal Identification (5.0L & 5.7L - EXPRESS & SAVANA)

Powertrain Control Module Connector Terminal Identification (5.7L CNG - PICKUP)

Powertrain Control Module Connector Terminal Identification (7.4L - EXPRESS & SAVANA)

Powertrain Control Module Connector Terminal Identification (7.4L - PICKUP)

Scheme 5

Powertrain Control Module Connector Terminal Identification (6.5L - EXPRESS & SAVANA)

Powertrain Control Module Connector Terminal Identification (6.5l - PICKUP)

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