Hello,
I have a 2005 H2 with 111,000 miles on it. My speedometer & tac has been going crazy. I'm driving down the highway and the speedometer drops and tac will max out. I did a google search and found Chevy Speedometer Problems-GM Settlement-Chevrolet Repair Has anyone got this problem repaired for free, I think it's something that should be recalled. My next step is to complain to the NTSB and lemon law folks. I don't think anyone should be having this problem in a ride this new, my 70 Chevelle is older then dirt and I never had this issue. Thanks

 

I have a 2003 Silverado has the same problem. They will fix it for free if you have less than 75000 miles on it. I worked for GM and complained to no avail. If you had it diagnosed and had it replaced they will refund you the money.