2008 Chevrolet Impala Door Lock Cylinder

You may apply heat to the cylinder area with a heat gun, hold the shutter door open with a paper clip or similar item and force air into the cylinder using compressed air and a blow gun attachment, while holding the shutter door open inject a small amount of multi-purpose lubricant GM P/N 12346241 or equivalent, then work the key into the cylinder several times and wipe any excess lubrication residue from the key.

The removal procedure is to remove the front door outside handle, remove the lock cylinder retainer clip, and remove the lock cylinder from the front door outside door handle.

The installation procedure is to install the lock cylinder to the front door outside door handle, install the lock cylinder retainer clip, then install the front door outside handle.

You should not attempt repairs to correct lock cylinder discrepancies.