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.
2010 GMC Terrain SLT, 3.0 Y, FWDFACTORY OEM SERVICE PROCEDURE
Diagnostic Code Index
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B0000 | B0000 5A: Vehicle Speed Information Circuit Not Plausible |
| DTC B1020 | B1020 00: Auxiliary Electronic Control Unit (ECU) Performance |
| DTC B125A | B125A 02: Antenna Signal Circuit Short to Ground B125A 04: Antenna Signal Circuit Open Circuit |
| DTC B125C | B125C 01: Satellite Antenna 1 Circuit Short to Battery B125C 02: Satellite Antenna 1 Circuit Short to Ground B125C 04: Satellite Antenna 1 Circuit Open Circuit |
| DTC B1265 | B1265 02: Switched 14 Volt Performance Short to Ground |
| DTC B1271 | B1271 00: Theft Protection Active |
| DTC B1278 or B1279 | B1278 01: Left Auxiliary Input Signal Circuit Short to Battery B1278 02: Left Auxiliary Input Signal Circuit Short to Ground B1279 01: Right Auxiliary Input Signal Circuit Short to Battery B1279 02: Right Auxiliary Input Signal Circuit Short to Ground |
| DTC B1287 | B1287 01: Amplifier Control Signal Circuit Short to Battery B1287 02: Amplifier Control Signal Circuit Short to Ground B1287 04: Amplifier Control Signal Circuit Open |
| DTC B1288 | B1288 01: Video Display Mode Control Signal Short to Battery B1288 02: Video Display Mode Control Signal Short to Ground B1288 04: Video Display Mode Control Signal Open Circuit |
| DTC B1289 | B1289 01: Video Display Brightness Control Signal Short to Battery B1289 02: Video Display Brightness Control Signal Short to Ground B1289 04: Video Display Brightness Control Signal Open Circuit |
| DTC B2455 | B2455 00: Cellular Phone Microphone Circuit B2455 04: Cellular Phone Microphone Circuit Open |
| DTC B2462 (OnStar/Navigation GPS Antenna) | B2462 01: Global Positioning System Short to Battery B2462 02: Global Positioning System Short to Ground B2462 04: Global Positioning System Open |
| DTC B2470 | B2470 04: Cellular Phone Antenna Circuit Open Circuit |
| DTC B2476 or B2482 | B2476 04: Cellular Phone Select Service Switch Open Circuit B2476 59: Cellular Phone Select Service Switch Stuck Button B2482 00: Cellular Phone Select Service Switch Range/Performance |
| DTC B2485 | B2485 04: Wireless Communication Antenna Circuit Open |
Factory Service Tools
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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.
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