NHTSA Complaint #10116484 — 2005 CHEVROLET TRAILBLAZER

I HAVE BROUGHT MY VECHICLE TO THE DEALERSHIP FOR SERVICE ON THREE SEPRATE OCASIONS FOR THE FOLLOWING CONDITION: THE VOLTAGE FLUCTUATES BETWEEN 10 AND 15 VOLTS, CAUSING THE HEADLIGHTS AND INSTRUMENT PANEL TO GO DIM, THEN BRIGHT AGAIN.*AK THE DEALERSHIP WAS UNABLE TO DIAGNOSE OR REPRODUCE THE PROBLEM. TODAY 04/06/2005 THE DEALERSHIP STATED THEY CONTACTED GM, AND STATED THAT THIS WAS NORMAL. THIS IS NOT NORMAL! I HAVE NEVER DRIVEN A VECHICLE IN WHICH HEADLIGHTS GOING DIM, THEN BRIGHT NORMAL. IT IS ALMOST AS IF THE LIGHTS ARE FLASHING AT TIMES. THE DEALERSHIP STATED THAT THERE ARE TSBS STATING THAT THIS IS NORMAL. THIS TO ME CREATES AN UNSAFE DRIVING ENVIRONMENT. I FOUND THE FOLLOWING STATEMENT ON GM TECHLINK: HTTP://WWW.GMTECHLINK.COM/IMAGES/ISSUES/CNT_MO/TLCME.HTML SOME CUSTOMERS MAY COMMENT THAT THEIR INSTRUMENT PANEL VOLTMETER IS FLUCTUATING BETWEEN 12 AND 14 VOLTS ON THEIR NEW 2005 MODEL YEAR LIGHT DUTY FULL SIZE PICKUP/UTILITY VEHICLE. FOR 2005 MODEL YEAR, LIGHT DUTY FULL SIZE PICKUPS AND UTILITIES, ARE EQUIPPED WITH A NEW REGULATED VOLTAGE CONTROL (RVC) SYSTEM, COVERED IN THE SEPTEMBER 2004 TECHLINK. THE RVC SYSTEM ALLOWS CHANGES TO VEHICLE VOLTAGE, UP OR DOWN, UNDER VARIOUS SCENARIOS. BATTERY STATE OF CHARGE AND THE VEHICLE?S PRESENT ELECTRICAL NEEDS ARE ONLY TWO OF NUMEROUS CONDITIONS TAKEN INTO ACCOUNT. THIS WILL CAUSE THE VOLTMETER TO FLUCTUATE BETWEEN 12 AND 14 VOLTS. BY COMPARISON, CONVENTIONAL SYSTEMS USUALLY MAINTAIN A MORE CONSISTENT READING OF 14 VOLTS. THIS FLUCTUATION WITH THE RVC SYSTEM IS NORMAL SYSTEM OPERATION AND NO REPAIRS SHOULD BE ATTEMPTED.