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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1993SUBURBAN C2500, 5.7 KREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - TRANSMISSION
1993 Chevrolet Suburban C2500, 5.7 K
Engine Controls - Tests W/Codes - Transmission
1993 Chevrolet Suburban C2500, 5.7 KSECTION Engine Controls - Tests W/Codes - Transmission
- 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)
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.