Service VME - Endgate Electrical Issues - kw code DTC history inoperative performance

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

The following is information regarding the 2004 Envoy XUV and three end gate electrical concerns that may have been encountered:

First Concern

1. An XUV may exhibit a condition of intermittent operation of the endgate drop and swing functions. If diagnosis with a scan tool reveals a DTC B3967, the condition may be occurring due to chaffing in the wire harness for the endgate latch actuators. Carefully inspect the harness inside the end gate for evidence of pinched or exposed wires. Pinched/chafed wires have been found inside the end gate within approximately 8 inches (203.2 mm) of the latch actuator connectors for the upper right and/or lower left latches.

Second Concern

2. If a history DTC B3966 has been set, it may be due to an out-of-range condition for the end gate window position that was set during initial cycling of the glass. The DTC should be cleared and then a Tech 2 endgate re-learn procedure should be performed with the endgate swung open. Then the gate should be closed and window full up and full down operations should be performed followed by other gate functional checks including rear wiper ,and drop/swing operations to confirm that the fault condition does not return. If this procedure does not correct the condition, then perform the diagnostic procedures in SI and repair as necessary.

Third Concern

3. If there is a loss of endgate function and loss of Class 2 communication with the endgate module, it may be due to a loss of battery power to the endgate module. Circuit 2740 should be checked to see if an open circuit condition exists at the body to endgate connector C900. Look for backed-out or poorly crimped terminals in the connector.

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Please follow this diagnosis 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. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.

(2004 GMC Envoy XUV)

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