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 MANUALSCHEVROLET2002EXPRESS 1/2 TON VAN V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINS
2002 Chevrolet Express 1/2 Ton Van V6-4.3L VIN W
Computers and Control Systems: Technical Service Bulletins
2002 Chevrolet Express 1/2 Ton Van V6-4.3L VIN WSECTION Technical Service Bulletins
- Customer Interest
- Electrical - MIL ON/DTC's Set By Various Control Modules
- A/T - Slips/Harsh Shifts/Delayed Shifts/Multiple DTC's
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- Engine - SES Lamp ON/Misfire DTC' Set Towing Uphill
- Electrical - A/T Stuck in 2nd/3rd Gear/MIL ON/DTC's
- Ignition System - SES Lamp ON/Misfire/DTC P0300
- Engine Controls - VCM/PCM Water Intrusion
- Fuel System - MIL ON/Rough Idle on Start-Up
- A/T - SES Lamp ON/DTC's Set/Slipping/Delayed Shifts
- Computers And Controls - DTC's Set Replacing Modules
- Engine Controls - Engine Runs Rough/MIL ON/DTC's Set
- By Symptom
- Abnormal wear/deterioration
- Customer Interest
- Electrical - MIL ON/DTC's Set By Various Control Modules
- A/T - Slips/Harsh Shifts/Delayed Shifts/Multiple DTC's
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- Engine - SES Lamp ON/Misfire DTC' Set Towing Uphill
- Electrical - A/T Stuck in 2nd/3rd Gear/MIL ON/DTC's
- Ignition System - SES Lamp ON/Misfire/DTC P0300
- Engine Controls - VCM/PCM Water Intrusion
- Fuel System - MIL ON/Rough Idle on Start-Up
- A/T - SES Lamp ON/DTC's Set/Slipping/Delayed Shifts
- Computers And Controls - DTC's Set Replacing Modules
- Engine Controls - Engine Runs Rough/MIL ON/DTC's Set
- Driveability
- Erratic Shifting
- Hard Shifting
- No shift/Incorrect gear engagement
- Slipping
- Sticking/Binding
- All Technical Service Bulletins
- Engine - THIS BULLETIN HAS BEEN CANCELED
- Electrical - MIL ON/DTC's Set By Various Control Modules
- A/T Control - DTC P0756 Diagnostic Tips
- A/T - MIL ON/DTC P0757/Harsh or Slipping 2-3 Shift
- A/T - DTC P0894 and P1870 Diagnostic Tips
- A/T - Slips/Harsh Shifts/Delayed Shifts/Multiple DTC's
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- Emissions - OBDII I/M Readiness Testing
- Engine Controls - MIL Function During I/M Testing
- Engine - SES Lamp ON/Misfire DTC' Set Towing Uphill
- Accessories - DTC's P0300, P1380, P1381
- Electrical - A/T Stuck in 2nd/3rd Gear/MIL ON/DTC's
- Electrical - Harness Connection Inspection
- Ignition System - SES Lamp ON/Misfire/DTC P0300
- Engine Controls - VCM/PCM Water Intrusion
- Fuel System - MIL ON/Rough Idle on Start-Up
- A/T - SES Lamp ON/DTC's Set/Slipping/Delayed Shifts
- Body Control - Update of Some Control Module DTC's
- Computers And Controls - DTC's Set Replacing Modules
- PCM/BCM Replacement - DTC's B001/B1271/B1780 Set
- EVAP System - Monitor Strategy
- Engine Controls - Engine Runs Rough/MIL ON/DTC's Set
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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.