CHEVROLET TRAILBLAZER BODY

Check En­gine Light Al­ter­nates On And Off Had Di­ag­nos­tic Check Found Every­thing Ok When I First Start Truck

Items In The Lift­gate, Ie Win­dow De­fog­ger, Rear Wiper, And Rear Win­dow Washer, Do Not Func­tion. Bcm Is­sue? Or Pos­si­bly Wiring At The...