NHTSA Complaint #10172583 — 2004 GMC ENVOY

I PURCHASED A 2004 GMC ENVOY WITH APPROXIMATELY 50000 MILES ON IT IN MAY OF 2006. ABOUT 4 MONTHS LATER, THE SPEEDOMETER STARTED ACTING SLIGHTLY ERRATIC, REPORTING SPEEDS VARYING BY 10-20 MPH (I.E. ON THE HIGHWAY, KEEPING UP WITH TRAFFIC AT 65 MPH, THE SPEEDOMETER WOULD REPORT 45 MPH OR SOMETIMES 80 MPH. OVER THE PAST FEW WEEKS, THE PROBLEM HAS GOTTEN MUCH WORSE, WITH THE SPEEDOMETER REPORTING 120 MPH AT HIGHWAYS SPEEDS, AND 50 MPH AT A STOP, SOMETIMES NOT REGISTERING ANY SPEED AT ALL (O MPH). THE CRUISE CONTROL HAS ALSO STOPPED WORKING, WHICH I AM ASSUMING IS RELATED TO THE SPEEDOMETER MALFUNCTION. I SEARCHED ONLINE, AND APPARENTLY THERE ARE MANY OTHER GMC OWNERS WITH THE SAME EXACT PROBLEM. PLEASE SEE LINK BELOW: HTTP://WWW.TOPIX.NET/FORUM/AUTOS/CHEVROLET-TAHOE/T2BGKBGI55EKNU77C/P1 THIS IS THE FIRST GMC CAR I HAVE PURCHASED AND I AM DISSATISFIED WITH THIS SAFETY ISSUE. I AM A PRETTY GOOD GUESS AT HOW FAST I AM GOING, HOWEVER WITHOUT AN ACCURATE SPEEDOMETER I FEEL I AM TAKING UNNECESSARY CHANCES. AS A REALTOR, I OFTEN HAVE CLIENTS IN MY VEHICLE AND I AM CONCERNED FOR THEIR SAFETY AS WELL. I FILED A COMPLAINT WITH GMC, BUT I WAS REFERRED TO THE DEALER AS THERE ARE NO CURRENT RECALLS FOR THIS PROBLEM. THE DEALER SAYS THAT THIS IS A $500 FIX, AND I AM CONCERNED AS THIS APPEARS TO BE A MANUFACTURER DEFECT, BASED ON THE NUMBER OF OTHER CONSUMERS WITH THIS SAME ISSUE. I NEVER EXPECTED TO HAVE AN ISSUE THIS PROBLEMATIC WITH A VEHICLE 2 YEARS OLD. I HOPE THAT BY REPORTING THIS ISSUE, THE NHTSA WILL BE ABLE TO HELP ME AND THE OTHER HUNDREDS OR THOUSANDS OF CONSUMERS WITH THIS SAFETY ISSUE. THANK YOU FOR YOUR TIME.