Liftglass Will Not Lock with Key

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

Liftglass will not lock with key after being UNlocked with key.

This is a normal condition. The liftgate must be locked using the front power door lock switch or RKE (if equipped). The liftgate module will also electronically lock the liftglass preventing its opening shortly after opening the liftgate. The liftglass can be opened normally after closing the liftgate.

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.