Circuit/System Testing
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the cruise control switch assembly.
- Connect a fused jumper between the voltage signal circuit and the low reference circuit.
- Ignition ON, observe the Cruise On/Off Switch parameter.
- If the Cruise On/Off Switch parameter displays ON, replace the cruise control switch assembly.
- If the Cruise On/Off Switch parameter displays Off, test the voltage signal circuit and the low reference circuit for an open, or for a high resistance.
- If all circuits test normal, replace the BCM.