Windows and Glass: Description and Operation

Glass, Frames and Mechanisms

The glass, frames and mechanisms section consists of the following:

- Accessory delay relay
- Body Control Module (BCM)
- Front Controls Interface Module (FCIM) (if equipped with navigation system)
- Front door window glass
- Front door window regulator and motor
- Front door window top run
- HVAC module
- Power/manual sliding glass panel (if equipped)
- Rear door window glass
- Rear door window regulator and motor
- Rear door window top run
- Rear window defrost relay
- Rear window glass
- Rear window glass regulator and motor
- Window control switch
- Windshield glass

If equipped with power windows, the window control switch:

- is located on each door trim panel.
- can be used to manually raise or lower all windows from the LH front window control switch or the individual side window from the corresponding individual door window control switch.
- can manually raise or lower the LH or RH front window when the corresponding front window control switch is pressed/pulled and held in the first detent position.
- can automatically raise or lower the LH or RH front window when the corresponding front window control switch is momentarily pressed/pulled to the second detent position and released.
- has a lock-out feature (SuperCab and SuperCrew only). When the LH front window lock-out switch is in the LOCK position, the rear passenger windows only operate from the LH front window control switch.

The rear glass can be equipped with an optional manual or power sliding glass.

Delayed Accessory Feature

The accessory delay relay, located in the BCM, provides voltage for the operation of the power windows and the roof opening panel (if equipped). The accessory delay relay is active when the ignition is in the RUN or the ACC position, or when the ignition is changed from RUN or ACC to the OFF/LOCK position and the LH and RH front doors are closed.

Heated Rear Window

The HVAC module controls the state of the rear window defrost relay. When the rear window defrost switch (integral to the HVAC module or FCIM if equipped with navigation system) is pressed and the engine is running, the HVAC module activates the rear window defrost relay. When the rear window defrost relay is active, the rear window defrost grid is energized and the rear window defrost status LED illuminates. For vehicles equipped with a power sliding rear window, the rear window defrost grid (and status LED) does not operate unless the rear sliding window glass is in the fully CLOSED position.

If equipped, the customer can select certain climate control modes/preferences when the vehicle is started using the remote start feature. When the rear defrost is set to AUTO mode, the rear window defrost activates when the outside temperature is less than 0°C (32°F). Once the ignition is cycled to the ON position, the climate control system returns to the previous settings (last ignition-ON cycle) and adjustments can be made normally. For additional information on how to set the remote start preferences, refer to the Owner's Literature.