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 G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 210 (KEYLESS ENTRY SYSTEM & REMOTE FUNCTIONS)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Diagnostic Code Index
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Diagnostic Code Index
WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B3119 | B3119 02: Keyless Entry Antenna 1 Performance Short to Ground B3119 05: Keyless Entry Antenna 1 Performance Short to Battery or Open |
| DTC B3120 | B3120 02: Keyless Entry Antenna 2 Performance Short to Ground B3120 05: Keyless Entry Antenna 2 Performance Short to Battery or Open |
| DTC B3121 | B3121 02: Keyless Entry Antenna 3 Performance Short to Ground B3121 05: Keyless Entry Antenna 3 Performance Short to Battery or Open |
| DTC B3122 | B3122 04: Keyless Entry Antenna 4 Performance Open Circuit B3122 3B: Keyless Entry Antenna 4 Performance Internal Self Test Failed |
| DTC B3123 | B3123 02: Keyless Entry Antenna 5 & 6 Performance Short to Ground B3123 04: Keyless Entry Antenna 5 & 6 Performance Open |
RENDER: 1.0x
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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.