Power Liftgate Erratic Operation Will Not Power Close DTC B153A And/Or Motor Running But Does Not Move – 2015 Cadillac Chevrolet GMC

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Bulletin No.: PIT5278C
Date: May-2015

This PI was superseded to update Add Vin Break and Recommendation/Instructions. Please discard PIT5278B.

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

Condition/Concern

Some owners may comment of any of the following issues:

• Erratic operation of the power liftgate
• Power liftgate hesitates during opening or closing, or does not go to the fully open or closed position
• When power closing the liftgate you can hear the motor running in the left actuator but the liftgate is not closing
• DTC B153A set in the Power Liftgate Module (usually combined with other erratic behavior of the power liftgate)

Recommendation/Instructions

Note: If the power liftgate does not open fully, and then reverses direction, the information in this document does not apply. It could be caused by the conditions listed in the latest version of PIT5286. DO NOT follow this procedure, putting a screw through the actuator, unless it has the conditions listed in this document.

These concerns may occur if the left liftgate actuator is internally coming apart. It will need to be replaced, but care must be taken when removing the left liftgate actuator from the vehicle. There is an assist spring inside the left actuator. If the internal portion of the actuator has completely separated, and if it is removed from the vehicle without following the procedure listed below, the end of the actuator can become a projectile.

Note: If you suspect the left actuator has this condition, DO NOT remove the right strut until the left actuator is replaced per the procedure below

1. Obtain one #8 self-tapping screw 1 1/2 inches long.
2. Fully open the liftgate
3. Install the self-tapping screw any place in the 30 mm space (from the bottom of the smooth tube) between location 1 and 2. As reflected below, a location of 20 mm (approximately 3/4″) is ideal to secure the tubes

Note: The screw will hold the actuator together for removal.

4. Remove the left liftgate actuator following the Liftgate Power Assist Actuator Replacement procedure in SI

Important: After the left liftgate actuator is removed, DO NOT remove the screws. The part will be requested back to the Warranty Parts Center once the associated warranty claim has paid.

Warranty Information

For vehicles repaired under warranty use:

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