NHTSA Complaint #10487178 — 2005 GMC ENVOY

ALMOST DUSK, HIGH BEAMS WERE ON. THOUGHT I SAW A FLICKER. GOT BEHIND ANOTHER CAR AND SAW THAT IT WAS MY LIGHTS. LOOKED TO MY PANEL AND MY VOLTAGE WAS SWINGING BETWEEN 9 VOLTS UP TO 18-19 VOLTS. TURNED ALL POWER DRAW OFF EXCEPT MY LOW BEAMS. NEEDLE KEPT SWINGING AND LIGHTS KEPT FLASHING. WAS 6 MILES FROM HOME. I MADE IT. THERE WAS A DISCHARGE TO MY SYSTEM INSTEAD OF CONTINUEING TO CHARGE. TOOK TO DEALER. NOTHING FOUND. 11-6-2012 IT HAPPENED AGAIN. HAS HAPPENED INBETWEEN ALSO. VERY INTERMITTANT. HAD BATTTERY & ALTERNATOR CHECKED AT LEAST 3 TIMES. ALWAYS GOOD. AFTER INCIDENTS, WORKS FINE UNTIL NEXT TIME. NEVER HAPPENED IN SUMMER. ALWAYS WHEN COOLER WEATHER. NOW THAT IT IS DECEMBER, AFRAID TO DRIVE AFTER DARK. THERE MUST A BULLENTIN OR RECALL??? TOO MANY COMPLAINTS ON THIS PROBLEM. DON'T WANT TO GET RID OF MY CAR. ENGINE IS GOOD. ONLY 69,000 MILES. IS DEALER JUST ACTING DUMB? *TR