WARNING:
Leaving children, helpless adults, or pets in a
vehicle with the windows closed is dangerous.
They can be overcome by the extreme heat and suffer permanent injuries or even death from heat stroke. Never leave a child, a helpless adult, or a pet alone in a vehicle, especially with the windows closed in warm or hot weather.
Chevrolet 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 ...