Airplanedoc
Newbie
Let me start by saying I did a search for similar issues and found several but not a fix. I have a 1996 GMC Sierra 1500 5.7 2WD and my speedometer reads 15 to 20 miles higher than actual speed with a scanner I read live data and the computer is seeing the correct speed from the VSS. I had the instrument cluster checked and was told the speedometer is accurate, could the problem be the computer? The wiring schematic shows the computer sending the signal to the instrument cluster.