14262 - special coverage. on some hybrid 2-MODE (HP2) vehicles, the accessory power module (apm) may not...
Chevrolet technical service bulletin G-203256 for 2009-2013 Chevrolet Silverado 1500, 2008-2013 Chevrolet Tahoe and 2009-2013 GMC Sierra 1500 and others.
- Bulletin number
- G-203256
- Component
- Equipment
- Summary
- 14262 - special coverage. On some hybrid 2-mode (hp2) vehicles, the accessory power module (apm) may not initialize when the vehicle is started in cold temperatures and the apm is cold. Once the apm warms up, it will initialize and perform as designed. However, during the time that the apm is not operational, it could result in a loss of power steering assist and the battery may not charge. If this condition occurs, the service power steering, service hybrid system, or service battery charging system message will appear in the driver information center, the malfunction indicator lamp and red battery telltale may illuminate, and dtc u1821 and u182a will be present. Dealers are to replace the apm.
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