Power Rear Liftgate Reverses When Closing - keywords adjustment close door gate lift open striker

This PI Supercedes To Include 2008 Enclave. Please Discard PIT4214.

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

The Power Liftgate (RPO E61) may reverse when closing. This reversal will occur just as the liftgate should latch closed. It is likely that there will not be any DTCs stored. Current diagnostics could lead to replace the PLGM but this may not resolve the concern. It is possible that if the striker is adjusted too far inboard or if the weatherstrip is not fully installed, it could allow the PLGM to detect an excess motor current condition and reverse the motor. It is also possible that an out of place sill plate could inadvertently contact the Liftgate Open Switch.

Prior to any part replacement, perform the following diagnostic steps:

1. Remove the Liftgate Sill Plate and cycle the Power Liftgate closed to see if the concern still exists. An improperly installed sill plate could contact the Interior Liftgate switch causing an Open request.
2. Inspect the Liftgate Weatherstrip Seal for being fully installed on the body.
3. Mark the current location of the Liftgate Striker, loosen the Striker bolts and strike the Striker rearward with a mallet to adjust the Liftgate Striker outboard (to the rear of the vehicle). Only move the Striker in 1mm increments, performing the Liftgate Calibration Procedure after each adjustment.

Important Note: It is critical for proper Liftgate operation that the Liftgate Calibration Procedure, as outlined in SI Document ID# 1864201, is performed every time the striker is adjusted and when any other liftgate repair is performed.

If striker adjustment is performed, be sure to verify fit and finish of the liftgate to adjacent panels is still acceptable before returning the vehicle to the customer. If condition persists after striker has been adjusted, follow published diagnostic procedures in SI.

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.