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 C1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1472 (TRAILER BRAKE CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2006 Chevrolet Suburban C1500, 5.3 Z
Diagnostic Code Index
2006 Chevrolet Suburban C1500, 5.3 ZSECTION Diagnostic Code Index
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B3894 | B3894 5A: Stop Lamp Switch Circuit Plausibility Failure |
| DTC C0561 | C0561 F0: System Disabled Information Stored Invalid Serial Data Received C0561 F1: System Disabled Information Stored Invalid Serial Data Received |
| DTC C056D or C056E | C056D 33: ECU Hardware Performance Special Memory Failure C056D 34: ECU Hardware Performance RAM Failure C056D 35: ECU Hardware Performance ROM Failure C056D 36: ECU Hardware Performance EEPROM Failure C056D 39: ECU Hardware Performance Internal Electronic Failure C056E 41: ECU Software Performance Operational Software/Calibration Set Not Programmed |
| DTC C0800 | C0800 03: Device Power Circuit Voltage Below Threshold C0800 07: Device Power Circuit Voltage Above Threshold |
| DTC C0845 | C0845 03: Device Ignition 1 Circuit Voltage Below Threshold |
| DTC C0870, C1112, C1113, C1114, or C1119 | C0870 00: Device Voltage Reference Output 1 Circuit C1112 00: Trailer Brake Control Relay Low Control Circuit C1113 01: Trailer Brake Control Relay High Control Circuit Short to Battery C1114 00: Trailer Brake Control Solenoids Control Circuit C1119 00: Trailer Brake Control Relay Feedback Circuit |
| DTC C0880, C0890, C1115, C1116, C1117, or C1118 | C0880 00: Device Voltage Reference Output 2 Circuit C0890 00: Device Voltage Reference Output 3 Circuit C1115 08: Manual Trailer Brake Apply Request Switch Signal Invalid C1115 5A: Manual Trailer Brake Apply Request Switch Signal Plausibility Failure C1116 00: Manual Trailer Brake Apply Request Signal 1 C1117 00: Manual Trailer Brake Apply Request Signal 2 C1118 00: Trailer Brake Control Sensitivity Switch Circuit C1118 08: Trailer Brake Control Sensitivity Switch Circuit Signal Invalid |
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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.