2005 gmc 2500hd speedometer is inaccurate. Gm is unwilling to fix the problem at their expense. They are covering the 2003 and 2004 models only. That makes very little sense to me as they are older models. I have noticed on the internet, that this is a wide spread problem.
2005 GMC Sierra 2500 electrical complaints
Page 3 of 3: complaints 41 to 42 of 42, newest first, as owners wrote them.
Speedometer reads wrong. Will be doing 55 MPH and the speedometer says 120 MPH. At a stop it says I am doing 80 MPH. Gmc wants over $500 to fix this. I am not alone in my complaint there are hundreds, if not thousands of others. Check out this website and see what others are saying: http://www.topix.com/forum/autos/chevrolet-tahoe/t2bgkbgi55eknu77c
VIN decoder
See the problems and recalls for an exact car
Buying a used 2005 GMC Sierra 2500?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history