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 MANUALSCHEVROLET2008CHEVY EXPRESS H1500, VAN PASSENGER, GASREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSDOOR LOCK SYSTEMS & DOOR HANDLESDIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2008 Chevrolet Chevy Express H1500, Van Passenger, Gas
Diagnostic Code Index
2008 Chevrolet Chevy Express H1500, Van Passenger, GasSECTION Diagnostic Code Index
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B2976, B2991, B2996, or B3001 | B2976 00: Driver Door Ajar Circuit B2991 00: Passenger Door Ajar Circuit B2996 00: Left Rear Door Ajar Circuit B3301 00: Right Rear Door Ajar Circuit |
| DTC B3125, B3130, or B3135 | B3125 00: Left Front/Driver Door Only Unlock Circuit B3130 00: All Door Unlock Circuit B3135 00: All Door Lock Circuit |
| DTC B3140, B3145, B3150, or B3155 | B3140 00: Driver Unlock Switch Circuit B3145 00: Passenger Unlock Switch Circuit B3150 00: Driver Lock Switch Circuit B3155 00: Passenger Lock Switch Circuit |
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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.