OnStar Overview
EmergencyRear Window Defogger Description and Operation
Rear Window Defogger System Components
The rear window defogger system consists of the following components:
HVAC Control Module
HVAC Control Head
Rear Window Defogger Relay
Rear Defogger Grid
F28UA 40A Fuse
Rear Window Defogger Operation
The rear defog control system utilizes a sin ...
Strut, Strut Component, or Spring Replacement
Special Tools
CH-6068 Spring Tensioner Device
CH-6066 Holding Device
For equivalent regional tools, refer to Special Tools.
Disassembly Procedure
Remove the strut assembly. Refer to Strut Assembly
Replacement.
Install the strut to the CH-6066 holder (5).
Tens ...
Installation Procedure
Drill 8 mm (5/16 in) for plug welding along the edges of the service
panel as noted from the original panel.
Clean and prepare the attaching surfaces for welding.
Position the roof rear header (1) panel on the vehicle.
Verify the fit of the panel.
Clamp the roof rear header ...