Speed odometer

The cluster on your 2003 GMC Sierra 1500 can be repaired or replaced with an exchange unit - if the exchange is done some factory programing may be necessary in order for the new cluster to function correctly. General Motors has also extended the warranty on these clusters so it may be worth checking with your local GM dealer. Here is the link to a repair shop in California for your cluster repair - http://www.sotelectronics.com/index.php3. I takes a special electronics repair shop to fix these clusters. A search may locate one near you.

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 (Dealer price is around $500-700)

Common problem with these. They can be repaired here: http://www.mrwhizard.com