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 MANUALSCHEVROLET2006SUBURBAN K2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1328 (WIRING SYSTEMS AND POWER MANAGEMENT - INTRODUCTION)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2006 Chevrolet Suburban K2500, 6.0 U
Diagnostic Code Index
2006 Chevrolet Suburban K2500, 6.0 USECTION Diagnostic Code Index
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B0005 | B0005 00: In Park Signal Circuit |
| DTC B1370 | B1370 01: Device Ignition 1 ON and START Circuit Short to Battery B1370 06: Device Ignition 1 ON and START Circuit Open |
| DTC B1380 (SDGM with HP2) | B1380 01: Device Ignition Accessory Circuit Short to Battery B1380 06: Device Ignition Accessory Circuit Open |
| DTC B1380 (BCM) | B1380 01: Device Ignition Accessory Circuit Short to Battery B1380 06: Device Ignition Accessory Circuit Open |
| DTC B1428 | B1428: Ignition Switched Power Run/Crank Relay Circuit |
| DTC B1433 | B1433 00: Ignition Switched Power Relay 2 Circuit |
| DTC B1440 | B1440 00: Power Mode Master Input Circuits Mismatch |
| DTC B1441 | B1441 01: Device Ignition Off/Run/Crank Circuit Short to Battery B1441 06: Device Ignition Off/Run/Crank Circuit Open |
| DTC B1448 | B1448 00: Accessory Power Relay Circuit |
| DTC B1475 | B1475 00: Retained Accessory Power 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.