BUZZERS, RELAYS & TIMERS
| Component | Location |
|---|---|
| A/C Relay | In underhood fuse block. |
| Auxiliary High Speed Blower Motor Relay | On left rear of passenger compartment, on auxiliary HVAC assembly. |
| Auxiliary Low Speed Blower Motor Relay | On left rear of passenger compartment, on auxiliary HVAC assembly. |
| Auxiliary Med Speed Blower Motor Relay | On left rear of passenger compartment, on auxiliary HVAC assembly. |
| AUXILIARY Relay | In body fuse block. |
| CARGO UNLK Relay | In body fuse block. |
| CTSY LP Relay | In body fuse block. |
| DOOR LKS Relay | In body fuse block. |
| DRV UNLK Relay | In body fuse block. |
| FUEL PUMP Relay | In underhood fuse block. |
| HDLP-HIBM Relay | In underhood fuse block. |
| HDLP-LOBM Relay | In underhood fuse block. |
| High Pressure Lock-Off Relay (CNG) | In underhood fuse block. |
| HORN Relay | In underhood fuse block. |
| Low Pressure Lock-Off Relay (CNG) | Near left side of fuel injector control module. |
| PARK LP Relay | In body fuse block. |
| PASS UNLK Relay | In body fuse block. |
| RR DEFOG Relay | In body fuse block. |
| SPARE Relay (2) | In underhood fuse block. |
| STARTER Relay | In underhood fuse block. |
| Trailer Stop/Turn Relay (Left/Right) | On left outer frame rail, near center of vehicle. |
| WIND RAP Relay | In body fuse block. |
| WPR Relay | In underhood fuse block. |
BUZZERS, RELAYS & TIMERS LOCATION
CIRCUIT PROTECTION DEVICES
| Component | Location |
|---|---|
| Body Fuse Block | Below left front seat. (Схема №12) |
| Rear Fuse Block | On left "B" pillar. |
| Underhood Fuse Block | On left side of engine compartment. (Схема №8) |
CIRCUIT PROTECTION DEVICES LOCATION
CONTROL UNITS
| Component | Location |
|---|---|
| Auxiliary HVAC Control Processor | Behind auxiliary HVAC controller, in headliner. |
| Body Control Module | Behind lower right side of dash. |
| Central Sequential Fuel Injection (4.3L VIN X) | On bottom of intake manifold. (Схема №1) |
| Cruise Control Module | Near brake fluid reservoir. |
| Electronic Brake Control Module | On left frame rail, near center of vehicle. |
| Fuel Injector Control Module (CNG) | On left side of radiator support. |
| Ignition Control Module (4.3L VIN X) | On top right side of engine, at ignition coil. (Схема №1) |
| Inflatable Restraint Sensing & Diagnostic Module | Under left front seat. (Схема №12) |
| Powertrain Control Module | In engine compartment, on left inner fender. (Схема №8) |
| Remote Control Door Lock Receiver | Behind upper left center of dash. (Схема №10) |
| Turn Signal/Hazard Flasher Module | Behind left center of dash. (Схема №10) |
| Vehicle Communication Interface Module | Below steering column. (Схема №10) |
CONTROL UNITS LOCATION
MOTORS
| Component | Location |
|---|---|
| Access Panel Actuators (Left Front Side) | Behind left front access panel. |
| Access Panel Actuators (Left Rear Side) | Behind left rear access panel. |
| Access Panel Actuators (Right Side) | Behind right access panel. |
| Air Temperature Actuator | Behind right side of dash, on HVAC assembly. |
| Auxiliary Air Temperature Actuator | On left rear of passenger compartment, on auxiliary HVAC assembly. |
| Auxiliary Blower Motor | On left rear of passenger compartment, on auxiliary HVAC assembly. |
| Auxiliary Mode Actuator | On left rear of passenger compartment, on auxiliary HVAC assembly. |
| Blower Motor | On right rear of engine compartment, on evaporator case. (Схема №9) |
| Fuel Pump & Sender Assembly | In fuel tank, under rear of vehicle. |
| Windshield Washer Fluid Pump | On left front of engine compartment, at washer reservoir. |
| Windshield Wiper Motor | On left side of firewall. |
MOTORS LOCATION
SENDING UNITS & SENSORS
| Component | Location |
|---|---|
| Ambient Air Temperature Sensor | Behind front grille, on radiator support. |
| Automatic Transmission Input Shaft Speed Sensor | On left side of transmission. |
| Camshaft Position Sensor (4.3L VIN X) | Part of distributor, top rear of engine. (Схема №3) |
| Camshaft Position Sensor (4.8L VIN V) | At top center rear of engine. (Схема №7) |
| Camshaft Position Sensor (5.3L VIN T) | At top center rear of engine. (Схема №7) |
| Camshaft Position Sensor (6.0L VIN U) | At top center rear of engine. (Схема №7) |
| Crankshaft Position Sensor (4.3L VIN X) | On lower front of engine, near crankshaft. |
| Crankshaft Position Sensor (4.8L VIN V) | On lower right rear of engine, near starter motor. (Схема №6) |
| Crankshaft Position Sensor (5.3L VIN T) | On lower right rear of engine, near starter motor. (Схема №6) |
| Crankshaft Position Sensor (6.0L VIN U) | On lower right rear of engine, near starter motor. (Схема №6) |
| Engine Coolant Temperature Gauge Sensor (4.3L VIN X) | On left side of engine. (Схема №2) |
| Engine Coolant Temperature Gauge Sensor (4.8L VIN V) | On left side of engine. |
| Engine Coolant Temperature Gauge Sensor (5.3L VIN T) | On left side of engine. |
| Engine Coolant Temperature Gauge Sensor (6.0L VIN U) | On left side of engine. |
| Engine Oil Pressure Sensor (4.3L VIN X) | On top rear of engine. (Схема №3) |
| Engine Oil Pressure Sensor (4.8L VIN V) | On top rear of engine. (Схема №7) |
| Engine Oil Pressure Sensor (5.3L VIN T) | On top rear of engine. (Схема №7) |
| Engine Oil Pressure Sensor (6.0L VIN U) | On top rear of engine. (Схема №7) |
| Fuel Pump & Sender Assembly | In fuel tank, under rear of vehicle. |
| Fuel Rail Pressure Sensor (CNG) | On right fuel rail. |
| Fuel Rail Temperature Sensor (CNG) | On right fuel rail. |
| Fuel Tank Pressure Sensor (CNG) | On rear tank high pressure lock-off. |
| Fuel Tank Pressure Sensor (Gasoline) | In fuel tank. |
| Heated Oxygen Sensor (Bank 1 Sensor 1) | In exhaust pipe, in front of catalytic converter. |
| Heated Oxygen Sensor (Bank 1 Sensor 2) | In exhaust pipe, in back of catalytic converter. |
| Heated Oxygen Sensor (Bank 2 Sensor 1) | In exhaust pipe, in front of catalytic converter. |
| Heated Oxygen Sensor (Bank 2 Sensor 2) | In exhaust pipe, in back of catalytic converter. |
| Inflatable Restraint Front End Sensor | On lower center of radiator support. |
| Intake Air Temperature Sensor | Integral with mass airflow sensor. |
| Knock Sensor (4.3L VIN X) | On top left rear of engine. (Схема №3) |
| Knock Sensor 1 (4.8L VIN V) | Below front of intake manifold. |
| Knock Sensor 1 (5.3L VIN T) | Below front of intake manifold. |
| Knock Sensor 1 (6.0L VIN U) | Below front of intake manifold. |
| Knock Sensor 2 (4.8L VIN V) | Below rear of intake manifold. |
| Knock Sensor 2 (5.3L VIN T) | Below rear of intake manifold. |
| Knock Sensor 2 (6.0L VIN U) | Below rear of intake manifold. |
| Manifold Absolute Pressure Sensor (4.3L VIN X) | On top right side of engine. (Схема №1) |
| Manifold Absolute Pressure Sensor (4.8L VIN V) | At top rear of engine, on intake manifold. |
| Manifold Absolute Pressure Sensor (5.3L VIN T) | At top rear of engine, on intake manifold. |
| Manifold Absolute Pressure Sensor (6.0L VIN U) | At top rear of engine, on intake manifold. |
| Mass Airflow Sensor | Part of air intake duct, at front of engine compartment. (Схема №9) |
| Passlock Sensor | Inside top of steering column. |
| Throttle Position Sensor (4.3L VIN X) | On left side of throttle body. |
| Throttle Position Sensor (4.8L VIN V) | On left side of throttle body. (Схема №4) |
| Throttle Position Sensor (5.3L VIN T) | On left side of throttle body. (Схема №4) |
| Throttle Position Sensor (6.0L VIN U) | On left side of throttle body. (Схема №4) |
| Vehicle Speed Sensor (4L60-E) | On right side of transmission. |
| Vehicle Speed Sensor (4L80-E) | On left side of transmission. |
| Wheel Speed Sensor (Left Front) | On inside of left front wheel. |
| Wheel Speed Sensor (Right Front) | On inside of right front wheel. |
SENDING UNITS & SENSORS LOCATION
SOLENOIDS & SOLENOID VALVES
| Component | Location |
|---|---|
| A/T Shift Lock Control Solenoid | On right side of steering column, under support bracket. |
| Evaporative Emission Canister Purge Solenoid (4.3L VIN X) | On top of engine, near throttle body. (Схема №1) |
| Evaporative Emission Canister Purge Solenoid (4.8L VIN V) | On top of engine, near throttle body. (Схема №4) |
| Evaporative Emission Canister Purge Solenoid (5.3L VIN T) | On top of engine, near throttle body. (Схема №4) |
| Evaporative Emission Canister Purge Solenoid (6.0L VIN U) | On top of engine, near throttle body. (Схема №4) |
| Evaporative Emission Canister Vent Solenoid | On EVAP canister, near front of fuel tank. |
| Exhaust Gas Recirculation Valve (6.0L VIN U) | On right front of engine. (Схема №5) |
| Idle Air Control Valve (4.3L VIN X) | On left side of throttle body. |
| Idle Air Control Valve (4.8L VIN V) | On left side of throttle body. (Схема №4) |
| Idle Air Control Valve (5.3L VIN T) | On left side of throttle body. (Схема №4) |
| Idle Air Control Valve (6.0L VIN U) | On left side of throttle body. (Схема №4) |
| Low Pressure Lock-Off Solenoid (CNG) | On right side of fuel rail. |
| Pressure Control Solenoid Valve | Internal to transmission. |
| Torque Converter Clutch Pulse Width Modulation Solenoid Valve | Internal to transmission. |
| Torque Converter Clutch Solenoid Valve | Internal to transmission. |
SOLENOIDS & SOLENOID VALVES LOCATION
SWITCHES
| Component | Location |
|---|---|
| A/C High Pressure Switch (4.3L VIN X) | On rear portion of A/C compressor. (Схема №2) |
| A/C High Pressure Switch (4.8L VIN V) | On rear portion of A/C compressor. (Схема №6) |
| A/C High Pressure Switch (5.3L VIN T) | On rear portion of A/C compressor. (Схема №6) |
| A/C High Pressure Switch (6.0L VIN U) | On rear portion of A/C compressor. (Схема №6) |
| A/C Low Pressure Switch | On side of accumulator. (Схема №9) |
| Brake Fluid Level Switch | On brake master cylinder reservoir. |
| Brake Pressure Differential Switch | On brake valve, near front of EBCM. |
| Engine Oil Level Switch (4.3L VIN X) | On right side of oil pan. |
| Engine Oil Level Switch (4.8L VIN V) | On right side of oil pan. (Схема №6) |
| Engine Oil Level Switch (5.3L VIN T) | On right side of oil pan. (Схема №6) |
| Engine Oil Level Switch (6.0L VIN U) | On right side of oil pan. (Схема №6) |
| Ignition Key Alarm Switch | Inside top of steering column. |
| Inflatable Restraint Seat Position Switch (Left/Right) | On respective seat track. |
| Park Brake Switch | Under left side of dash. |
| Park/Neutral Position Switch | On left side of transmission. |
| Power Brake Booster Fluid Flow Alarm Switch | Near power steering pump, in outlet hose. |
| Power Brake Booster Fluid Pressure Alarm Switch | Near power brake booster, in booster inlet hose. |
| Seat Belt Switch | In left front seat belt latch. |
| Stoplamp Switch | Behind left side of dash, above brake pedal. |
SWITCHES LOCATION
MISCELLANEOUS
| Component | Location |
|---|---|
| Auxiliary Blower Motor Resistor Assembly | On left rear of passenger compartment, on auxiliary HVAC assembly. |
| Blower Motor Resistor Assembly | At right rear of engine compartment, on evaporator case. (Схема №9) |
| Data Link Connector | Under left side of dash. |
| High Pressure Lock-Off (CNG) | Threaded into CNG tank end. |
| Ignition Coil (4.3L VIN X) | On top right side of engine. |
| Seat Belt Pretensioner (Left Front) | On right side of left front seat. |
| Seat Belt Pretensioner (Right Front) | On left side of right front seat. |
MISCELLANEOUS LOCATION
CONNECTORS
| Component | Location |
|---|---|
| C100 (Early Production) (Black, 24 Pin) | At left rear of engine compartment, near underhood fuse block. (Схема №8) |
| C100 (Late Production) (Black, 14 Pin) | At left rear of engine compartment, near underhood fuse block. (Схема №8) |
| C101 (Black, 16 Pin) | At left rear of engine compartment, near underhood fuse block. (Схема №8) |
| C103 (Black, 2 Pin) | Near top center of engine. |
| C104 (Early Production) (Black, 2 Pin) | Near left side of radiator support. |
| C104 (Late Production) (Yellow, 2 Pin) | Near left side of radiator support. |
| C109 (Black, 2 Pin) | At left rear of engine compartment, near underhood lamp. (Схема №8) |
| C126 (Light Gray, 8 Pin) | On top of left valve cover. |
| C127 (4.8L VIN V) (Light Gray, 8 Pin) | On top of right valve cover. (Схема №5) |
| C127 (5.3L VIN T) (Light Gray, 8 Pin) | On top of right valve cover. (Схема №5) |
| C127 (6.0L VIN U) (Light Gray, 8 Pin) | On top of right valve cover. (Схема №5) |
| C128 (Black, 8 Pin) | Rear oxygen sensor harness, near right frame rail. |
| C141 (Light Gray/Black, 2 Pin) | At left rear of engine compartment, near firewall. |
| C175 (4L60-E) (Gray, 20 Pin) | On right side of transmission. |
| C175 (4L80-E) (Gray, 20 Pin) | On left side of transmission. |
| C200 (Gray/Black, 48 Pin) | At base of steering column. (Схема №10) |
| C201 | Behind right kick panel. (Схема №11) |
| C202 | Behind right kick panel. (Схема №11) |
| C203 (Black, 2 Pin) | Near top of right "B" pillar. |
| C204 (Black, 3 Pin) | Behind right side of dash, near BCM. |
| C205 (Gray/Black, 24 Pin) | Behind right side of dash, near BCM. |
| C206 (Light Blue, 24 Pin) | Behind right side of dash, near BCM. |
| C220 (Gray, 2 Pin) | Behind left side of dash, above parking brake. |
| C221 (Light Gray/Gray, 6 Pin) | Behind left side of dash, above brake pedal. |
| C222 (Black, 4 Pin) | Behind left side of dash, near parking brake. |
| C225 (Black, 12 Pin) | Behind right kick panel. (Схема №11) |
| C300 (Yellow, 2 Pin) | Near body fuse block. (Схема №12) |
| C303 (Black, 6 Pin) | Near top of left "B" pillar. |
| C304 (Black, 12 Pin) | Near top of left "B" pillar. |
| C306 (Heavy Duty) (Black, 2 Pin) | Below right front seat. |
| C306 (Light Duty) (Black, 12 Pin) | Below right front seat. |
| C307 (Heavy Duty) (Black, 4 Pin) | Below left front seat. |
| C307 (Light Duty) (Black, 6 Pin) | Below left front seat. |
| C311 (Black, 40 Pin) | Behind left kick panel. |
| C312 (Black, 18 Pin) | Behind right kick panel. |
| C318 (Light Gray, 40 Pin) | Behind left kick panel. (Схема №12) |
| C319 (Black, 8 Pin) | Behind left kick panel. |
| C320 (Black, 16 Pin) | Near base of left "C" pillar. |
| C321 (Black, 4 Pin) | Near center of left "C" pillar. |
| C400 (Black, 8 Pin) | Near center of right "D" pillar. (Схема №13) |
| C405 (Black, 10 Pin) | Chassis harness to cutaway rear lighting connector, near left rear frame rail. |
| C407 (W/Auxiliary HVAC) (Gray, 6 Pin) | Near auxiliary HVAC assembly. |
| C407 (W/O Auxiliary HVAC) (Gray, 6 Pin) | Near base of left "B" pillar. |
| C409 (W/Auxiliary HVAC) (Black, 2 Pin) | Near auxiliary HVAC assembly. |
| C409 (W/O Auxiliary HVAC) (Black, 2 Pin) | Near base of left "B" pillar. |
| C411 (Black, 6 Pin) | Near center of left "D" pillar. (Схема №13) |
| C412 (Black, 3 Pin) | Near center of right "D" pillar. (Схема №13) |
| C415 (Black, 4 Pin) | At rear of vehicle, on center of rear roof rail. (Схема №13) |
| C417 (Black, 2 Pin) | Near top of left "C" pillar. |
| C419 (Black, 2 Pin) | At rear of vehicle, on center of rear roof rail. (Схема №13) |
| C420 (Black, 12 Pin) | Near top of right "B" pillar. |
| C901 (Gray, 2 Pin) | In left cargo door, near grommet. |
| C902 (Gray, 2 Pin) | In right cargo door, near grommet. |
CONNECTORS LOCATION
GROUNDS
| Component | Location |
|---|---|
| G100 | On left front of engine compartment. |
| G101 | On right front of engine compartment. |
| G102 (4.3L VIN X) | On left rear of engine. (Схема №3) |
| G102 (4.8L VIN V) | On left rear of engine. (Схема №7) |
| G102 (5.3L VIN T) | On left rear of engine. (Схема №7) |
| G102 (6.0L VIN U) | On left rear of engine. (Схема №7) |
| G103 (4.3L VIN X) | On right rear of engine. (Схема №3) |
| G103 (4.8L VIN V) | On right rear of engine. (Схема №7) |
| G103 (5.3L VIN T) | On right rear of engine. (Схема №7) |
| G103 (6.0L VIN U) | On right rear of engine. (Схема №7) |
| G104 | On lower right front of engine. |
| G105 | On right front frame rail, in engine compartment. |
| G106 | On right front of engine compartment. |
| G300 | On left frame rail, near EBCM. |
| G301 | Behind left kick panel. (Схема №12) |
| G302 | Behind left kick panel. (Схема №12) |
| G303 | Behind left kick panel. (Схема №12) |
| G304 | Behind right kick panel. (Схема №11) |
| G347 | On bottom of left "B" pillar. |
| G400 | On inner left rear frame rail. |
| G401 | On top of right "D" pillar. (Схема №13) |
| G402 | On top of left "D" pillar. (Схема №13) |
| G403 | On center of left "D" pillar. |
GROUNDS LOCATION