Power Windows: Description
Each power window is moved by a single permanent magnet motor. The direction in which motor turns depends on the polarity of the voltage applied. All power window motors have a self-resetting circuit breaker built into them.
On Blazer, Jimmy and Suburban the tailgate window is operated by an internal switch or a key. A cut-out switch prevents operation of the window by either switch when the tailgate is open. Circuit is protected by a 30-amp circuit breaker, located at fuse block.