NHTSA Complaint #10146525 — 2005 GMC ENVOY

(2005 ENVOY) ABOUT 1 MONTH AGO I NOTICED THAT MY HEADLIGHTS WERE DIMMING WHILE DRIVING AT NIGHT . THIS HAPPENED SPORADICALLY. WHEN THE LIGHTS DIM, THE HEAT SLOWS DOWN AS WELL. THE INTERIOR LIGHTS OCCASIONALLY DIM WHEN THIS HAPPENS, TOO. MY HUSBAND AND I THOUGHT IT MIGHT BE THE BATTERY AND STARTED TO LOOK AT THE BATTERY GAGE, WHILE ONE OF US KEPT AN EYE ON THE LIGHTS. THIS PROBLEM HAS HAPPENED ABOUT 7 TIMES OVER THE LAST MONTH. LAST WEEK IT HAPPENED ABOUT EVERY 2 MINUTES WHILE DRIVING DOWN THE ROAD. VERY SCARY, AS I THOUGHT THE TRUCK WAS JUST GOING TO SHUT DOWN. I TOOK THE TRUCK TO MY GM DEALER AND THE MECHANIC SAID THAT THERE IS NOTHING WRONG WITH THE TRUCK. THE BATTERY, ALTERNATOR AND WIRES WERE FINE. HE STATED THAT WITH NEW VEHICLES AND EVERYTHING THAT IS RUN IN THEM THIS IS NORMAL. ALTHOUGH HE ALSO STATED THAT HE HAS NEVER SEEN THIS PROBLEM BEFORE. THEIR COMPUTER TOLD THEM THAT NOTHING NEEDED TO BE FIXED. WE HAVE NO AFTERMARKET PRODUCTS IN THE VEHICLE AND THE ONLY THINGS RUNNING WERE THE HEAT AND RADIO. *NM