I'm driving my Dad's Yukon XL tonight and tomorrow till I can pick up my truck tomorrow from the shop. Dad said that the truck's speedometer has been sticking. He checked it with his Garmin GPS and said that it can be off from 5-15mph at times. I was coming into the neighborhood tonight and it said I was doing 40 and stuck there. No Possible way I could even do 40 in our neighborhood Is this a common problem? I know my roommate had to send his speedometer off in his work truck to a guy to fix it. But is there a simplier way to fix it? It's a 2005 GMC Yukon XL with the 5.3 V8 (I think) Thanks I'm not familiar with these new GMs.