My tach no longer works and getting false overheating. Needle pegs and engine runs as normal with fans on. Coolent is full and no leaks. 37000 miles. My question is,before I bring to dealer, is this covered by GM? I have read online of other cases like this.Seems to common.
Instrument panel on 2005 Chevrolet Impala
by Visitor in Wilmington, DE on September 15, 2010
ANSWER by V8Turbo , October 28, 2010
This is very common on the 03-06 GMs. The cause is the motors behind the gauges are failing, they all go out eventually. You can get it repaired here - www.drspeedometer.com and there's a DIY guide here - www.howtorepairmyinstrumentcluster.com