Conditions For Setting The DTC
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
DTC will set under one of the following conditions:
- The TCM is calibrated for BUS circuit communication and the TCM detects an error on the Controller Area Network (CAN) link (no engine throttle or torque messages) for 3 seconds.
- An open at the CAN backbone.