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Repair manual

Engine Controls - Tests W/codes - 6.5L Diesel: Diagnosis GMC Cab & Chassis C2500

Step-by-step instructions on "Engine Controls - Tests W/codes - 6.5L Diesel: Diagnosis" for GMC Cab & Chassis C2500 (1989–2000). Pick an article — removal, installation, adjustment and diagnostics with illustrations.

54subsections

54articles

65illustrations

SELF-DIAGNOSTIC SYSTEM

1 article

• SELF-DIAGNOSTIC SYSTEM

Preliminary Inspection

1 article

• Preliminary Inspection

Diagnostic Procedure

1 article

• Diagnostic Procedure

ENTERING OR EXITING DIAGNOSTIC MODE

1 article

• ENTERING OR EXITING DIAGNOSTIC MODE 1

SPECIAL TOOLS (DIAGNOSTIC)

1 article

• SPECIAL TOOLS (DIAGNOSTIC)

TEST EQUIPMENT

1 article

• TEST EQUIPMENT

CLEARING TROUBLE CODES

1 article

• CLEARING TROUBLE CODES

DIAGNOSTIC TROUBLE CODE CHARTS

1 article

• DIAGNOSTIC TROUBLE CODE CHARTS

DIAGNOSTIC SYSTEM CHECK

1 article

• DIAGNOSTIC SYSTEM CHECK 2

Diagnostic Aids

1 article

• Diagnostic Aids 3

DTC 13 - ENGINE SHUTOFF SOLENOID CIRCUIT FAULT

1 article

• DTC 13 - ENGINE SHUTOFF SOLENOID CIRCUIT FAULT 2

DTC 14 - ECT SENSOR CIRCUIT LOW (HIGH TEMPERATURE INDICATED)

1 article

• DTC 14 - ECT SENSOR CIRCUIT LOW (HIGH TEMPERATURE INDICATED) 2

DTC 15 - ECT SENSOR CIRCUIT HIGH (LOW TEMPERATURE INDICATED)

1 article

• DTC 15 - ECT SENSOR CIRCUIT HIGH (LOW TEMPERATURE INDICATED) 1

DTC 16 - VEHICLE SPEED SIGNAL BUFFER FAULT

1 article

• DTC 16 - VEHICLE SPEED SIGNAL BUFFER FAULT 2

DTC 17 - HIGH RESOLUTION CIRCUIT FAULT

1 article

• DTC 17 - HIGH RESOLUTION CIRCUIT FAULT 2

DTC 18 - PUMP CAM REFERENCE PULSE ERROR

1 article

• DTC 18 - PUMP CAM REFERENCE PULSE ERROR 1

DTC 19 - CRANKSHAFT POSITION REFERENCE ERROR

1 article

• DTC 19 - CRANKSHAFT POSITION REFERENCE ERROR 2

DTC 21 - ACCELERATOR PEDAL POSITION (APP) NO. 1 CIRCUIT HIGH

1 article

• DTC 21 - ACCELERATOR PEDAL POSITION (APP) NO. 1 CIRCUIT HIGH 2

DTC 22 - ACCELERATOR PEDAL POSITION (APP) NO. 1 CIRCUIT LOW

1 article

• DTC 22 - ACCELERATOR PEDAL POSITION (APP) NO. 1 CIRCUIT LOW 1

DTC 23 - ACCELERATOR PEDAL POS (APP) NO. 1 CKT RANGE FAULT

1 article

• DTC 23 - ACCELERATOR PEDAL POS (APP) NO. 1 CKT RANGE FAULT 1

DTC 25 - ACCELERATOR PEDAL POSITION (APP) NO. 2 CIRCUIT HIGH

1 article

• DTC 25 - ACCELERATOR PEDAL POSITION (APP) NO. 2 CIRCUIT HIGH 1

DTC 26 - ACCELERATOR PEDAL POSITION (APP) NO. 2 CIRCUIT LOW

1 article

• DTC 26 - ACCELERATOR PEDAL POSITION (APP) NO. 2 CIRCUIT LOW 1

DTC 27 - ACCELERATOR PEDAL POS (APP) NO. 2 CKT RANGE FAULT

1 article

• DTC 27 - ACCELERATOR PEDAL POS (APP) NO. 2 CKT RANGE FAULT 1

DTC 29 - GLOW PLUG RELAY CIRCUIT FAULT

1 article

• DTC 29 - GLOW PLUG RELAY CIRCUIT FAULT 2

DTC 31 - EGR CNTRL PRESSURE/BARO SENSOR CKT LOW (HIGH VACUUM)

1 article

• DTC 31 - EGR CNTRL PRESSURE/BARO SENSOR CKT LOW (HIGH VACUUM) 1

DTC 32 - EGR CIRCUIT ERROR

1 article

• DTC 32 - EGR CIRCUIT ERROR 2

DTC 33 - EGR CNTRL PRESSURE/BARO SENSOR CKT HIGH (LOW VACUUM)

1 article

• DTC 33 - EGR CNTRL PRESSURE/BARO SENSOR CKT HIGH (LOW VACUUM) 1

DTC 34 - INJECTION TIMING STEPPER (ITS) MOTOR CIRCUIT FAULT

1 article

• DTC 34 - INJECTION TIMING STEPPER (ITS) MOTOR CIRCUIT FAULT 2

DTC 35 - INJECTION PULSE WIDTH ERROR (RESPONSE TIME SHORT)

1 article

• DTC 35 - INJECTION PULSE WIDTH ERROR (RESPONSE TIME SHORT) 1

DTC 36 - INJECTION PULSE WIDTH ERROR (RESPONSE TIME LONG)

1 article

• DTC 36 - INJECTION PULSE WIDTH ERROR (RESPONSE TIME LONG) 1

DTC 41 - BRAKE SWITCH CIRCUIT FAULT

1 article

• DTC 41 - BRAKE SWITCH CIRCUIT FAULT 2

DTC 42 - FUEL TEMPERATURE CKT LOW (HIGH TEMP INDICATED)

1 article

• DTC 42 - FUEL TEMPERATURE CKT LOW (HIGH TEMP INDICATED) 1

DTC 43 - FUEL TEMPERATURE CKT HIGH (LOW TEMP INDICATED)

1 article

• DTC 43 - FUEL TEMPERATURE CKT HIGH (LOW TEMP INDICATED) 1

DTC 44 - EGR PULSE WIDTH ERROR

1 article

• DTC 44 - EGR PULSE WIDTH ERROR 1

DTC 45 - EGR VENT ERROR

1 article

• DTC 45 - EGR VENT ERROR 1

DTC 46 - MIL (SERVICE ENGINE SOON LIGHT) CIRCUIT FAULT

1 article

• DTC 46 - MIL (SERVICE ENGINE SOON LIGHT) CIRCUIT FAULT 2

DTC 47 - IAT SENSOR CIRCUIT LOW (HIGH TEMPERATURE INDICATED)

1 article

• DTC 47 - IAT SENSOR CIRCUIT LOW (HIGH TEMPERATURE INDICATED) 1

DTC 48 - IAT SENSOR CIRCUIT HIGH (LOW TEMPERATURE INDICATED)

1 article

• DTC 48 - IAT SENSOR CIRCUIT HIGH (LOW TEMPERATURE INDICATED) 1

DTC 49 - MIL (SERVICE THROTTLE SOON LIGHT) CIRCUIT FAULT

1 article

• DTC 49 - MIL (SERVICE THROTTLE SOON LIGHT) CIRCUIT FAULT 1

DTC 51 - PROM PROBLEM (FAULTY OR INCORRECT PROM)

1 article

• DTC 51 - PROM PROBLEM (FAULTY OR INCORRECT PROM)

DTC 54 - PCM FUEL CIRCUIT ERROR

1 article

• DTC 54 - PCM FUEL CIRCUIT ERROR 1

DTC 57 - PCM 5-VOLT SHORTED

1 article

• DTC 57 - PCM 5-VOLT SHORTED 1

DTC 61 - TURBO BOOST SENSOR CKT HIGH

1 article

• DTC 61 - TURBO BOOST SENSOR CKT HIGH 1

DTC 62 - TURBO BOOST SENSOR CKT LOW

1 article

• DTC 62 - TURBO BOOST SENSOR CKT LOW 1

DTC 63 - ACCELERATOR PEDAL POSITION (APP) NO. 3 CIRCUIT HIGH

1 article

• DTC 63 - ACCELERATOR PEDAL POSITION (APP) NO. 3 CIRCUIT HIGH 1

DTC 64 - ACCELERATOR PEDAL POSITION (APP) NO. 3 CIRCUIT LOW

1 article

• DTC 64 - ACCELERATOR PEDAL POSITION (APP) NO. 3 CIRCUIT LOW 1

DTC 65 - APP NO. 3 CIRCUIT RANGE FAULT

1 article

• DTC 65 - APP NO. 3 CIRCUIT RANGE FAULT 1

DTC 71 - SET/COAST SWITCH FAULT

1 article

• DTC 71 - SET/COAST SWITCH FAULT 2

DTC 76 - RESUME/ACCEL SWITCH FAULT

1 article

• DTC 76 - RESUME/ACCEL SWITCH FAULT 1

DTC 78 - WASTEGATE SOLENOID FAULT

1 article

• DTC 78 - WASTEGATE SOLENOID FAULT 1

DTC 84 - ACCELERATOR PEDAL POSITION (APP) CIRCUIT FAULT

1 article

• DTC 84 - ACCELERATOR PEDAL POSITION (APP) CIRCUIT FAULT 1

DTC 88 - TDC OFFSET ERROR

1 article

• DTC 88 - TDC OFFSET ERROR

DTC'S 91-98 - CYLINDER BALANCE FAULT

1 article

• DTC'S 91-98 - CYLINDER BALANCE FAULT

DTC 99 - APP No. 2 (5-VOLT REFERENCE FAULT)

1 article

• DTC 99 - APP No. 2 (5-VOLT REFERENCE FAULT) 7