Conditions for Running the DTC
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.
- The IAH is commanded ON.
- The GPCM battery voltage is between 9.5-15 volts.
- DTC P154B runs continuously when the above condition is met.