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• A/c Compressor
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• Cooling System (Mechanical)
• Cruise Control Systems
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• Differentials & Drive Axles
• Door Locks & Anti-Theft Systems
• Driveline/axles
• Driveshaft & Universal Joints
• Electrical Component Locations
• Emission Applications
• Engine
• Engine Controls - Tests W/codes - 6.5L Diesel: Diagnosis
• Engine Performance
• Fuses & Circuit Breakers
• Gauges & Instrument Panels
• General Servicing - All Makes
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• Mechanical - Hydraulic
• Metric Conversions
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• Pin Voltage Charts
• Procedures
• Removal & Installation
• Reset Procedures
• Rpo Codes
• Sensor Range Charts
• Specifications
• Starter
• Steering
• Steering Column
• Steering Column Switches
• Suspension Front
• Suspension Rear
• Testing & Diagnostics
• Theory & Operation
• Traction Control Disable
• Transfer Case
• Transmission
• Wheel Alignment
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• Wiring Diagrams - Engine Performance

Repair manual

Automatic Transmission - Diagnosis - 4L80-E: Diagnosis GMC Cab & Chassis C2500

Step-by-step instructions on "Automatic Transmission - Diagnosis - 4L80-E: Diagnosis" for GMC Cab & Chassis C2500 (1989–2000). Pick an article — removal, installation, adjustment and diagnostics with illustrations.

52subsections

52articles

120illustrations

SELF-DIAGNOSTICS

1 article

• SELF-DIAGNOSTICS

ELECTRONIC SELF-DIAGNOSTICS

1 article

• ELECTRONIC SELF-DIAGNOSTICS

RETRIEVING CODES (WITHOUT SCAN TOOL)

1 article

• RETRIEVING CODES (WITHOUT SCAN TOOL) 1

RETRIEVING CODES (WITH SCAN TOOL)

1 article

• RETRIEVING CODES (WITH SCAN TOOL)

TROUBLE CODE DEFINITION

1 article

• TROUBLE CODE DEFINITION

HARD OR INTERMITTENT TROUBLE CODE DETERMINATION

1 article

• HARD OR INTERMITTENT TROUBLE CODE DETERMINATION

CLEARING TROUBLE CODES

1 article

• CLEARING TROUBLE CODES

DIAGNOSTIC CHARTS

1 article

• DIAGNOSTIC CHARTS

Diagnostic Aids

1 article

• Diagnostic Aids 4

CHART A-2, NO ALDL DATA, NO DTC 12 OR MIL (SERVICE ENGINE SOON) LIGHT ON

1 article

• CHART A-2, NO ALDL DATA, NO DTC 12 OR MIL (SERVICE ENGINE SOON) LIGHT ON 1

DTC 14, COOLANT TEMPERATURE SENSOR HIGH TEMPERATURE INDICATED (SIGNAL VOLTAGE LOW)

1 article

• DTC 14, COOLANT TEMPERATURE SENSOR HIGH TEMPERATURE INDICATED (SIGNAL VOLTAGE LOW) 4

DTC 15, COOLANT TEMPERATURE SENSOR LOW TEMPERATURE INDICATED (SIGNAL VOLTAGE HIGH)

1 article

• DTC 15, COOLANT TEMPERATURE SENSOR LOW TEMPERATURE INDICATED (SIGNAL VOLTAGE HIGH) 1

DTC 21, THROTTLE POSITION SENSOR SIGNAL VOLTAGE HIGH

1 article

• DTC 21, THROTTLE POSITION SENSOR SIGNAL VOLTAGE HIGH 4

DTC 21/22, THROTTLE POSITION SENSOR SIGNAL VOLTAGE LOW/HIGH (1994) DIESEL

1 article

• DTC 21/22, THROTTLE POSITION SENSOR SIGNAL VOLTAGE LOW/HIGH (1994) DIESEL 2

DTC 22, THROTTLE POSITION SENSOR SIGNAL VOLTAGE LOW

1 article

• DTC 22, THROTTLE POSITION SENSOR SIGNAL VOLTAGE LOW 1

DTC 24, OUTPUT SPEED SENSOR LOW (1993 2WD)

1 article

• DTC 24, OUTPUT SPEED SENSOR LOW (1993 2WD) 2

DTC 24, OUTPUT SPEED SENSOR LOW (1993 4WD)

1 article

• DTC 24, OUTPUT SPEED SENSOR LOW (1993 4WD) 2

DTC 24 & DTC 72, VEHICLE SPEED SENSOR (OUTPUT SPEED SIGNAL LOW) & (OUTPUT SPEED SIGNAL LOSS) 1994

1 article

• DTC 24 & DTC 72, VEHICLE SPEED SENSOR (OUTPUT SPEED SIGNAL LOW) & (OUTPUT SPEED SIGNAL LOSS) 1994 3

DTC 28, PRESSURE SWITCH MANIFOLD (PSM) ASSEMBLY FAULT (1993)

1 article

• DTC 28, PRESSURE SWITCH MANIFOLD (PSM) ASSEMBLY FAULT (1993) 2

DTC 28, PRESSURE SWITCH MANIFOLD (PSM) ASSEMBLY FAULT (1994)

1 article

• DTC 28, PRESSURE SWITCH MANIFOLD (PSM) ASSEMBLY FAULT (1994) 3

DTC 37 & 38, TCC BRAKE SWITCH STUCK ON OR OFF (1994)

1 article

• DTC 37 & 38, TCC BRAKE SWITCH STUCK ON OR OFF (1994) 7

DTC 51, PROM PROBLEM

1 article

• DTC 51, PROM PROBLEM

DTC 52 & 53, LONG SYSTEM VOLTAGE HIGH OR SYSTEM VOLTAGE HIGH (1994)

1 article

• DTC 52 & 53, LONG SYSTEM VOLTAGE HIGH OR SYSTEM VOLTAGE HIGH (1994) 2

DTC 53, SYSTEM VOLTAGE HIGH (1993)

1 article

• DTC 53, SYSTEM VOLTAGE HIGH (1993) 2

DTC 58, TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT (HIGH TEMPERATURE INDICATED) 1993

1 article

• DTC 58, TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT (HIGH TEMPERATURE INDICATED) 1993 2

DTC 58, TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT (HIGH TEMPERATURE INDICATED) 1994

1 article

• DTC 58, TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT (HIGH TEMPERATURE INDICATED) 1994 2

DTC 59, TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT (LOW TEMPERATURE INDICATED) 1993

1 article

• DTC 59, TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT (LOW TEMPERATURE INDICATED) 1993 1

DTC 59, TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT (LOW TEMPERATURE INDICATED) 1994

1 article

• DTC 59, TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT (LOW TEMPERATURE INDICATED) 1994 2

DTC 63 & 64, BAROMETRIC PRESSURE SENSOR CIRCUIT HIGH OR LOW (1994) DIESEL

1 article

• DTC 63 & 64, BAROMETRIC PRESSURE SENSOR CIRCUIT HIGH OR LOW (1994) DIESEL 2

DTC 68, OVERDRIVE RATIO ERROR (1993)

1 article

• DTC 68, OVERDRIVE RATIO ERROR (1993) 2

DTC 68, OVERDRIVE RATIO ERROR (1994)

1 article

• DTC 68, OVERDRIVE RATIO ERROR (1994) 3

DTC 71, CAMSHAFT POSITION SENSOR CIRCUIT LOW (1994) DIESEL

1 article

• DTC 71, CAMSHAFT POSITION SENSOR CIRCUIT LOW (1994) DIESEL 2

DTC 73, FORCE MOTOR CURRENT (CURRENT ERROR) 1993

1 article

• DTC 73, FORCE MOTOR CURRENT (CURRENT ERROR) 1993 2

DTC 73, FORCE MOTOR CURRENT (CURRENT ERROR) 1994

1 article

• DTC 73, FORCE MOTOR CURRENT (CURRENT ERROR) 1994 3

DTC 74, INPUT SPEED SENSOR CIRCUIT (1994)

1 article

• DTC 74, INPUT SPEED SENSOR CIRCUIT (1994) 3

DTC 75, SYSTEM VOLTAGE LOW (1993)

1 article

• DTC 75, SYSTEM VOLTAGE LOW (1993)

DTC 75, SYSTEM VOLTAGE LOW (1994)

1 article

• DTC 75, SYSTEM VOLTAGE LOW (1994) 2

DTC 79, TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT (HIGH TEMPERATURE INDICATED) 1994

1 article

• DTC 79, TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT (HIGH TEMPERATURE INDICATED) 1994 2

DTC 81, SOLENOID "B" CIRCUIT FAULT (1993)

1 article

• DTC 81, SOLENOID "B" CIRCUIT FAULT (1993) 2

DTC 81, SOLENOID "B" CIRCUIT FAULT (1994)

1 article

• DTC 81, SOLENOID "B" CIRCUIT FAULT (1994) 3

DTC 82, SOLENOID "A" CIRCUIT FAULT (1993)

1 article

• DTC 82, SOLENOID "A" CIRCUIT FAULT (1993) 2

DTC 82, SOLENOID "A" CIRCUIT FAULT (1994)

1 article

• DTC 82, SOLENOID "A" CIRCUIT FAULT (1994) 3

DTC 83, TCC SOLENOID CIRCUIT FAULT (1993)

1 article

• DTC 83, TCC SOLENOID CIRCUIT FAULT (1993) 3

DTC 83, TCC SOLENOID CIRCUIT FAULT (1994)

1 article

• DTC 83, TCC SOLENOID CIRCUIT FAULT (1994) 3

DTC 85, UNDEFINED GEAR RATIO (1993)

1 article

• DTC 85, UNDEFINED GEAR RATIO (1993) 2

DTC 85, UNDEFINED GEAR RATIO (1994)

1 article

• DTC 85, UNDEFINED GEAR RATIO (1994) 3

DTC 86, LOW GEAR RATIO (1993)

1 article

• DTC 86, LOW GEAR RATIO (1993) 1

DTC 86, LOW GEAR RATIO (1994)

1 article

• DTC 86, LOW GEAR RATIO (1994) 1

DTC 87, HIGH GEAR RATIO (1993)

1 article

• DTC 87, HIGH GEAR RATIO (1993) 1

DTC 87, HIGH GEAR RATIO (1994)

1 article

• DTC 87, HIGH GEAR RATIO (1994) 1

COMPONENT TEST CHARTS (NO CODES)

1 article

• COMPONENT TEST CHARTS (NO CODES)

TCC TESTING

1 article

• TCC TESTING 26