Where is circuit breaker in engine for 2007 Chevy Malibu power windows?

There isn't a dedicated circuit breaker in the engine bay for the power windows in a 2007 Chevy Malibu. The power window system's protection is typically handled by fuses located inside the vehicle's interior fuse box (usually under the dashboard or in the glove compartment). You'll need to consult your owner's manual to locate the fuse box and identify the correct fuse for the power windows.