Headlamp driver module envoy

– Buick Rainier, Chevrolet Trailblazer and GMC Envoy vehicles; certain Pontiac Grand Prix vehicles and certain Chevrolet Trailblazer Ext and GMC Envoy XL vehicles. The headlamp driver module (HDM) may not operate properly in the thermal environment of the underhood electrical center. Order GMC Envoy Headlight Relay online today. Free Same Day Store Pickup. Check out free battery charging and engine diagnostic testing while you are in store.  · GMC EVOY and Chevy TRAILBLAZERS have a common problem with the headlamp relay causing low beam headlight failure. This video is just a quick tip fo.

The headlamp driver module (HDM) is an electronic module that provides electrical power to the vehicle low beam headlamps. The HDM is controlled by a pulse width modulated (PWM) ground signal from the body control module (BCM). Envoy vehicles; certain or Pontiac Grand Prix vehicles and certain Chevrolet Trailblazer EXT and GMC Envoy XL vehicles the headlamp driver module (HDM) may not operate properly in the thermal environment of the underhood electrical center. If the HDM is not operating correctly, the low-beam. GM headlamp driver modules are the focus of an investigation by the National Highway Traffic Safety Administration that wants to know if a General Motors headlight module recall fixed the.

Sept It is a new headlight driver module (HDM relay), GM part # Our 07 Trailblazer was not recalled in Canada, and I cannot find. Low beams not coming on? This is a common issue with GM SUV's, such as the Trailblazer, Rainier, Bravada and Saab 97X. Jul I replaced both fuses, the HDM relay, the headlight switch and This Fuse feeds the power side of the Headlight Driver Module Relay then.