Radio Navigation IPC Or HVAC Concerns (Oversized Terminals) - keywords B1025 B1035 B1055 B1065 B1075 B1085 B1095 B1105 B1115 B1287 B128A B128D B0163 B0183 B0188 navigation radio speaker U0155 U0184 U0

This PI was superseded to update Condition Concern and Recommendation/Instructions. Please discard PIC4640.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

The customer may notice any number of concerns with the Instrument Panel Cluster (IPC), HVAC, Navigation or radio sound systems that seem electrical in nature. The cause may be the result of oversized .64 female terminals in some I/P wire harness connectors allowing for poor or intermittent contact. The following connectors may be involved:

HVAC Control Module X1 (Black) 18 -way

Radio Module X1 (Black) 44 -way

Radio Module X4 (Olive) 20 -way

Integrated Center Stack (Black) 16 -way

Display Navigation X2 (Gray) 8 -way

Display Navigation X1 (Black) 8 -way

IPC (Black) 20 -way

Test the female .64 terminals in these connectors as required using J-35616-64B test probe. Drop or release the test probe into each populated cavity of the connector. Insertion into the cavity is not required and the technician can stop as soon as resistance is met. Test each terminal while rotating the connector body 90° (twisting the harness) to ensure the resistance does not change. If the tool drops down into any of the populated cavities without resistance, that terminal is non- conforming and should be replaced.

Important: Radio and HVAC concerns can be the result of poor Low Speed GMLAN circuit connections at the IPC. Do not overlook testing the terminals at the IPC for these concerns.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.