Grand Prix V8-5.3L (2007)
Door Lock Cylinder: Service and Repair
Frozen Lock Cylinder Repair
FROZEN LOCK CYLINDER REPAIR
Repair frozen lock cylinders due to cold weather using the following procedure:
1. IMPORTANT: Be careful not to damage painted surfaces while using a heat gun.
Apply heat to the cylinder area with a heat gun.
2. Use a paper clip or a similar item in order to hold the shutter door open.
3. Use compressed air and a blow gun attachment in order to force air into the cylinder.
4. While holding the shutter door open, inject a small amount of multi-purpose lubricant GM P/N 12346241, (Canadian P/N 10953474) or
equivalent.
5. Work the key into the cylinder several times.
6. Wipe any excess lubrication residue from the key.
