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 1942 (HYBRID/EV CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P1B0D OR P1B0ECIRCUIT/SYSTEM VERIFICATION
2006 Chevrolet Suburban K2500, 6.0 U
Circuit/System Verification
2006 Chevrolet Suburban K2500, 6.0 USECTION Circuit/System Verification
WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
- Verify that DTC P0723 is not set.
- If the DTC is set, refer to DTC P0721-P0723 .
- Verify there is no other hybrid Transmission DTCs set.
- If other Hybrid Transmission DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Ignition OFF for at least one minute. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. Verify that DTCs P1B0D or P1B0E is not set.
- If DTCs P1B0D or P1B0E is set, program the drive motor generator power inverter module with the latest software version. If the DTC resets replace the T6 drive motor generator power inverter module.
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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.