Circuit/System Verification

WARNING: This page is about a different car, the 2012 Buick Verano. However, it is still accessible from the selected car via links, so may be relevant.

Verify if DTC U0074 is set by the K73 Telematics Communication Interface Control Module.

If DTC U0074 is set by the K73 Telematics Communication Interface Control Module, refer to Scan Tool Does Not Communicate with High Speed GMLAN Device .