Section 7 (Engine Controls - Tests W/Codes - Transmission)
WARNING: This page does not describe the selected car, but rather 26 other vehicles, including the 1993 GMC Yukon, 1993 GMC Vandura Special, 1993 GMC Vandura, 1993 GMC Value Van, and 1993 GMC Suburban. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Self-Diagnostic System
- Trouble Code Charts
- Trouble Code Charts (4L60-E)
- Code 28, Fluid Pressure Switch Assembly Fault
- Code 37, Brake Switch Stuck On
- Code 38, Brake Switch Stuck Off
- Code 52, Long System Voltage High
- Code 53, System Voltage High
- Code 58, Trans Fluid Temp. Sens CKT (High Temp. Indicated)
- Code 59, Transmission Fluid Temp. Sensor Circuit (Low Temp. Indicated)
- Code 66, 3-2 Control Solenoid Circuit Fault
- Code 67, TCC Solenoid Circuit Check
- Code 69, Torque Converter Clutch Stuck On
- Code 72, Vehicle Speed Sensor Loss (2WD, AWD & 4WD)
- Code 73, Pressure Control Solenoid (Current Error)
- Code 75, System Voltage Low
- Code 79, Transmission Fluid OVERTEMP
- Code 81, 2-3 Shift Solenoid Circuit Fault
- Code 82, 1-2 Shift Solenoid Circuit Fault
- Component Check Charts (4L60-E)
- Vehicle Speed Sensor Check (2WD & AWD)
- Vehicle Speed Sensor Check (4WD)
- Brake Signal Circuit Check
- Torque Converter Clutch (TCC) Solenoid Circuit Check
- 3-2 Control Solenoid Circuit Check
- 1-2 Shift Solenoid Circuit Check
- 2-3 Shift Solenoid Circuit Check
- Pressure Control Solenoid Circuit Check
- Fluid Pressure Switch Assembly Circuit Check
- Trouble Code Charts (4L80E)
- Code 28, Pressure Switch Manifold Fault
- Code 39, Torque Converter Clutch Stuck Off
- Code 53, System Voltage High
- Notes On INTERMITTENTS
- Code 58, Trans Fluid Temp. Sens CKT (High Temp. Indicated)
- Code 59, Transmission Fluid Temp. Sensor Circuit (Low Temp. Indicated)
- Code 68, Overdrive Ratio Error
- Code 73, Force Motor Current (Current Error)
- Code 75, System Voltage Low
- Note On INTERMITTENTS
- Code 81, Solenoid "B" Circuit Fault
- Code 82, Solenoid "A" Circuit Fault
- Code 83, TCC Solenoid Circuit Fault
- Code 85, Undefined Gear Ratio
- Code 86, Low Gear Ratio
- Code 87, High Gear Ratio
- Component Check Charts (4L80-E)