Frozen Lock Cylinder Repair

Repair lock cylinders frozen due to cold weather using the following procedure:

IMPORTANT: Be careful not to damage painted surfaces while using a heat gun.

1. Apply heat to the cylinder area with a heat gun.
2. Hold the shutter door open with a paper clip or similar item.
Force air into the cylinder.
Use compressed air and a blow gun attachment.
4. While holding the shutter door open, inject a small amount of multi-purpose lubricant GM P/N 12346241 or equivalent.
5. Work the key into the cylinder several times.
6. Wipe any excess lubrication residue from the key.