S10/T10 Blazer 4WD V6-4.3L VIN W (1997)
Front Door Panel: Service and Repair
Binding Lock Cylinders
Binding or sticking door lock cylinders and keys that are hard to insert or remove may be corrected in many cases by applying the proper lubrication.
The recommended materials for lubricating these components are (in order of preference):
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Lubricant GM P/N 12345120, or equivalent.
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5 W-30 synthetic motor oil.
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Silicone spray GM P/N 1052276, or equivalent.
Penetrating lubricants such as GM P/N 1052949 and WD-40(R) ARE NOT RECOMMENDED because they wash out the original lubrication and
eventually evaporate, leaving little or no lubricating material. However, if these materials are used to unfreeze or loosen lock cylinder components. Refer
to Steps 2 through 4 below for proper methods of lubrication.
Frozen lock cylinders due to cold weather may be repaired using the following procedure:
1. Apply heat to the lock cylinder with a heat gun while being careful not to damage the painted surfaces.
2. Hold the lock cylinder shutter open with a paper clip (or similar object) and force air into the cylinder using compressed air and a blow gun
attachment.
3. While holding the lock cylinder shutter open, inject a small amount of lubricant (refer to above recommendations) into the cylinder.
4. Work the key into the lock cylinder several times and wipe any excess lubricant from the key.
