Speedo Off [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: Speedo Off


DLBartley
03-08-2008, 01:43 AM
I bought a used 07 with 20's on it but the speedo has not been adjusted. Which is the easiest fix, dealer or tuner right now since warranty is still in effect?

cowboy56
03-08-2008, 06:17 PM
Dealer can't change size on speedo.

Unit453
03-08-2008, 06:37 PM
Dealers CAN change the speedo through the ECM. They can go up to 285's.

cowboy56
03-10-2008, 12:39 AM
I was told by multiple dealerships and techs that they cannot change the speedo, they can only change the tire size for the ABS. I wanted to get mine changed to be more accurate.

CCDC
03-10-2008, 09:30 AM
Dealers CAN change the speedo through the ECM. They can go up to 285's.


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