Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC1995SAFARI VAN PASSENGER, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSDIAGNOSIS - 4L60-E
1995 GMC Safari Van Passenger, AWD
Diagnosis - 4L60-E
1995 GMC Safari Van Passenger, AWDSECTION Diagnosis - 4L60-E
- Application
- Description
- Operation
- Trouble Shooting
- Electronic Self-Diagnostics
- Diagnostic Charts - Cars
- Introduction
- Code 14, Cts Signal Voltage Low (High Temperature Indicated)
- Code 15, Cts Signal Voltage High (Low Temperature Indicated)
- Code 21, Throttle Position Sensor Signal Voltage High
- Code 22, Throttle Position Sensor Signal Voltage Low
- Code 24, Vehicle Speed Sensor - 3.4L "F" Body, 4.3L & 5.7L "B", "D", "F" & "Y" Bodies
- Code 28, Trans. Range Pressure Switch - 3.4L "F" Body, 4.3L & 5.7L "B", "D", "F" & "Y" Bodies
- Code 37, TCC Brake Switch Error - 3.4L "F" Body, 4.3L & 5.7L "B", "D", "F" & "Y" Bodies
- Code 38, Brake Switch Error - 4.3L & 5.7L "B/D/F/Y" Bodies
- Code 53, System Voltage High - 3.4L "F" Body, 4.3L & 5.7L "B", "D", "F" & "Y" Bodies
- Code 58, Trans. Temp. Sensor High - 3.4L "F" Body, 4.3L & 5.7L "B", "D", "F" & "Y" Bodies
- Code 59, Trans. Temperature Sensor Low Temperature - 3.4L "F" Body, 4.3L & 5.7L "B", "D", "F" & "Y" Bodies
- Code 72, Vehicle Speed Sensor Loss - 3.4L "F" Body, 4.3L & 5.7L "B", "D" & "F" Bodies
- Code 72, Vehicle Speed Sensor Loss - 5.7L "Y" Body
- Code 73, Pressure Control Solenoid - 4.3L/5.7L "B/D/F/Y" Bodies
- Code 74, Traction Control Voltage Low - 5.7L "D/F/Y" Bodies
- Code 75, Trans. Voltage Low - 4.3/5.7L "B/D/F/Y" Bodies
- Code 79, Transmission Fluid OVERTEMP - 3.4L "F" Body, 4.3L & 5.7L "B", "D", "F" & "Y" Bodies
- Code 80, Transmission Component Slipping - 3.4L "F" Body
- Code 81, 2-3 Shift Solenoid - 4.3L & 5.7L "B/D/F/Y" Bodies
- Code 82, 1-2 Shift Solenoid - 4.3L & 5.7L "B/D/F/Y" Bodies
- Code 83, TCC PWM Solenoid - 4.3L & 5.7L "B/D/F/Y" Bodies
- Code 84, 3-2 Control Solenoid - 4.3L & 5.7L "B/D/F/Y" Bodies
- Code 85, TCC Stuck On - 4.3L & 5.7L "B", "D", "F" & "Y" Bodies
- Code 90, TCC Solenoid Circuit - 3.4L "F" Body, 4.3L & 5.7L "B", "D", "F" & "Y" Bodies
- Code 93, Pressure Control Solenoid - 3.4L "F" Body
- Code 96, Transmission Voltage Low - 3.4L "F" Body
- Diagnostic Charts - Light Trucks & Vans - Gasoline Except "S" & "T" Series 4.3L VIN W
- Introduction
- Code 14, Coolant Temperature Sensor Signal Voltage Low
- Code 15, Coolant Temperature Sensor Signal Voltage High
- Code 21, TPS Signal Voltage High
- Code 22, TPS Signal Voltage Low
- Code 24, Vehicle Speed Sensor Transmission Output Signal
- Code 28, Trans. Range Pressure Switch
- Codes 37/38, TCC Brake Switch On/Off
- Code 52/53, System Voltage High
- Code 58, Trans. Fluid Temp. High
- Code 59, Trans. Fluid Temp. Low
- Code 66, 3-2 Control Solenoid Circuit Fault
- Code 67, TCC Solenoid Circuit Check
- Code 69, Torque Converter Clutch Stuck On
- Code 72, VSS Circuit Loss Transmission Output Signal
- Code 73, Pressure Control Solenoid (Current Error)
- Code 75, System Voltage Low
- Code 79, Trans. Fluid Temperature High
- Code 81, Trans. 2-3 Error
- Code 82, Trans. 1-2 Error
- Code 83, TCC Solenoid Circuit Fault
- Diagnostic Charts - Light Trucks & Vans - Diesel
- Introduction
- On-Board Diagnostic (OBD) System Check
- Chart A-1, No Mil (Service Engine Soon Light)
- Chart A-2, No Scan Data, Mil (SES) Always On Or Won't Flash
- Chart A-3, Engine Cranks But Will Not Run
- DTC 14, ECT Sensor CKT Low (High Temperature Indicated)
- DTC 15, ECT Sensor CKT High (Low Temperature Indicated)
- DTC 24, VSS Circuit Low (Trans Output Speed Signal)
- DTC 28, Trans. Range Pressure Switch Circuit Fault
- DTCS 37/38, TCC Brake Switch Stuck On/Off
- DTCS 52/53, System Voltage High Too Long
- DTC 58, Trans. Fluid Temp. Sensor Ck Low High Temperature Indicated)
- DTC 59, Trans. Fluid Temp. Sensor CKT High Low Temperature Indicated)
- DTC 66, 3-2 Control Solenoid Circuit Fault
- DTC 67, TCC Solenoid Circuit Fault
- DTC 69, TCC Stuck On
- DTC 72, Vehicle Speed Sensor Circuit Loss (Trans Output Speed Signal)
- DTC 73, Pressure Control Solenoid Circuit (Current Error)
- DTC 75, System Voltage Low
- DTC 79, Transmission Fluid OVERTEMP
- DTC 81, 2-3 Shift Solenoid Circuit Fault
- DTC 82, 1-2 Shift Solenoid Circuit Fault
- DTC 83, TCC PWM Solenoid Circuit Fault
- Diagnostic Charts - "S" & "T" Series 4.3L VIN W
- Introduction
- Code P0117, Cts Temperature Low - "S" & "T" 4.3L (VIN W)
- Code P0118, Cts Temperature High - "S" & "T" 4.3L (VIN W)
- Code P0122, TPS Signal Low - "S" & "T" 4.3L (VIN W)
- Code P0123, TPS Signal High - "S" & "T" 4.3L (VIN W)
- Codes P0502/P0503, VSS Ck Low/High - "S" & "T" 4.3L (VIN W)
- Code P0560, System Voltage Malfunction - "S" & "T" Series 4.3L (VIN W)
- Code P0703, TCC Brake Input Circuit - "S" & "T" Series 4.3L (VIN W)
- Code P0712, Trans. Temp. Sensor Voltage Low "S" & "T" Series 4.3L (VIN W)
- Code P0713, Trans. Temp. Sensor Voltage High - "S" & "T" Series 4.3L (VIN W)
- Code P0742, TCC Stuck On - "S" & "T" Series 4.3L (VIN W)
- Code P0748, Pressure Control Solenoid - "S" & "T" Series 4.3L (VIN W)
- Code P0753, 1-2 Shift Solenoid - "S" & "T" 4.3L (VIN W)
- Code P0756, 2-3 Shift Solenoid Performance - "S" & "T" Series 4.3L (VIN W)
- Code P0758, 2-3 Shift Solenoid Electrical - "S" & "T" Series 4.3L (VIN W)
- Code P1810, Transmission Range Switch Assembly Circuit S" & "T" Series 4.3L (VIN W)
- Code P1812, Trans. Fluid OVERTEMP - "S" & "T" Series 4.3L (VIN W)
- Code P1860, TCC PWM Solenoid Electrical CKT - "S" & "T" Series 4.3L (VIN W)
- Code P1864, TCC Solenoid Electrical CKT - "S" & "T" Series 4.3L (VIN W)
- Code P1870, Transmission Component Slipping - "S" & "T" Series 4.3L (VIN W)
- Code P1886, 3-2 Solenoid Electrical Circuit - "S" & "T" Series 4.3L (VIN W)
- Component Tests
- Technical Service Bulletins (TSB)
- Notes
- Prom (MEMCAL) Replacement
- Pcm Replacement
- Driveline Growl &/Or Vibration (Replace MEMCAL)
- DTC 72 (VSS) Diagnostics
- Lack Of Power, Early, Late Or Erratic Shifts
- 1993-95 "C", "G", "K" & "T" 4WD Vehicles (ATRA TSB No. 343)
- Early, Late Or Erratic Shifts (All Models)
- 4WD-Low Diagnostic Check ("K" Series With Manually Or Electronically Shifted Transfer Case In High Position)
- 4WD-Low Diagnostic Check ("T" Series With PCM & Manually Shifted Transfer Case In High Position)
- 4WD-Low Diagnostic Check ("T" Series With VCM & Manually Shifted Transfer Case In High Position)
- 4WD-Low Diagnostic Check ("T" Series With Electronically Shifted Transfer Case In High Position)
- Wiring Diagrams
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.