Silicone grease on weatherstrips will make them last longer, seal better, and not stick or squeak. Apply silicone grease with a clean cloth. During very cold, damp weather frequent application may be required.
See Recommended Fluids and Lubricants.
Care of Safety Belts
Washing Your VehicleChevrolet Cobalt Service & Repair Manual. Door Lock Cylinder
1.
Remove exterior door handle as outlined
in "Door Handle.".
2.
Disengage lock rod from door lock cylinder.
3.
Remove door lock cylinder.
4.
Reverse procedure to instal ...