Diagnostic Fault Information
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.
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| SDG Module B+ Voltage | U1812, U1821, U1862, U1875, U1878, U1888, U0129 | U1812, U1821, U1862 | - | - |
| Wake Up Signal | U1812, *B137A 06 | U1812 | U1813, *B137A 01 | - |
| SDG Module Ground | - | U1812, U1821, U1862 | - | - |
| * Sets in the SDG module. No crank, no start. Battery pack contactors are open. drive motor generator battery control module and SDG module will both be inoperative | ||||