Rear Window Defogger System Components
The rear window defogger system consists of the following components:
Rear Window Defogger Operation
The rear defog control system utilizes a single zone backlight design, driven with a single relay configuration. Additionally, up to two outside rear view mirrors can be heated if required. A switch for the customer to control the system is provided within the HVAC control head. Also included in the HVAC control head is an indicator to inform the customer with the current state of the system. The system is only operational when engine is running or during remote start.
Pressing the heated rear window switch on the HVAC control face plate causes the HVAC control head to send a serial data message to the HVAC control module requesting rear window defog operation. The HVAC control module upon receipt of the serial data message will provide voltage to the coil side of the rear window defogger relay, this will energize the relay causing the relay switch contacts to close allowing B+ voltage to flow through the rear defogger grid control circuit to the rear defogger grid.
When the rear heated window switch is pressed and the engine is running, the rear defog control system will remain active for 10 minutes.
After the initial cycle has lapsed, pressing the switch again will continue rear window defogger operation, but the cycle will only last 5 minutes. The rear defog control system will function continuously if the vehicle speed is greater than 70 kilometers per hour (45 mph).
Stationary Window Description
Most stationary windows, specifically windshields, are retained to the body with urethane adhesive which adheres the window to the body.
This increases structural integrity. The reinstallation of windows with urethane adhesive requires complete replacement of the urethane adhesive bead: The extended method (also known as long method, full strip or full cut) is the only recommended procedure for General Motors Vehicle.
Special Tools and Equipment
Installation Procedure
Remove rear end upper panel extension (1) from service part.
Cut
Cut the body side inner panel in corresponding locations to fit the
remaining original panel. The sectioning joint should be trimmed to
allow a gap of one-and-one-half-times the metal thickness at the sectioni ...
Restraint System
Note: If the vehicle has been in a collision, refer to Repairs and
Inspections Required After a Collision for additional information.
Vehicle has front and rear seat belts that are the primary means of occupant
restraint. Seat belts help to keep the occupants inside the
passenger compartment a ...
Remote Keyless Entry (RKE) System Operation
The transmitter functions may work up to 60m(195 ft) away from the vehicle. On
vehicles with remote start the distance will be greater.
Keep in mind that other conditions, such as those previously stated, can impact
the performance of the transmitter.
(Lock): Press to lock all doors.
The t ...