2003 Chevy Tahoe jumpy speedometer and broken tach is it a sensor or computer?
The computer had to be reset. Had the same problem and thought
it was a sensor but only took the computer being "reset" by the
dealership. Cost $200 in Dallas area.
The problem is not with the computer.
this is a common problem on all 03-06 GM Vehicles
if you wanna get it fixed Just go to
www.speedomtergaugerepair.com They fixed my instruments cluster on
my 2004 Chevrolet Silverado. They charged me $150 to replace all
the gauges in the cluster. here is the address in case you wanna
check it out: www.speedometergaugerepair.com