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 C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1596 (DATA COMMUNICATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC U1885CIRCUIT/SYSTEM VERIFICATION
2006 Chevrolet Suburban C2500, 6.0 U
Circuit/System Verification
2006 Chevrolet Suburban C2500, 6.0 USECTION Circuit/System Verification
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Verify the following DTCs are not set in the modules as follows:
- Verify DTC U0111 is not set in the SDGM.
- If the DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Verify DTC U1888 is not set in the HPCM.
- If the DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
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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.