Just to add some accurate, current info to this thread.......

Same thing happened to me on my '03 GMC Duramax. Did a google search and found:

http://gmgaugerepair.com/?gclid=CPH5...FRJ1gwodh30b_A

Take out your cluster and send it in. They fix them and retain your mileage info. The removal/replace is simple.

Question is......why doesn't someone do a class-action suit to GM to fix these? It's a real safety issue as you lose gas gauge, speedo, everything! This should be fixed via recall for older vehicles as it is clearly due to a flawed product. Even if you've paid for replacement out of warranty, they should reimburse you. It's clearly a faulty gauge cluster.

 

G.M.Special Coverage Adjustment

On November 7, 2008, the U.S. District Court in Seattle granted final approval of a class action settlement for owners and lessees of certain 2003 to 2005 General Motors vehicles with allegedly defective speedometers (also known as “console clusters”).

Chevrolet Avalanche
Chevrolet Silverado
Chevrolet Suburban
Chevrolet Tahoe
GMC Yukon
GMC Yukon XL
GMC Sierra
Cadillac Escalade
Cadillac Escalade ESV
Cadillac Escalade EXT

Common symptoms include:

* Speedometer displays incorrectly
* Speedometer stops working
* Tachometer needle sticks, jumps, or pegs
* Fuel gauge flutters
* Entire instrument panel fails


If your vehicle is within 7 years or 70,000 miles (110,000 km) of the date it was first placed in service, GM must replace the instrument panel (parts and labor) for free.

If your vehicle is between 70,001 miles (110,001 km) and 80,000 miles (130,000 km) of the date it was first placed in service, GM must replace the instrument panel (parts) for free. Any labor costs will be the responsibility of the vehicle owner.

If your vehicle is older than 7 years or over 80,000 miles, you no longer qualify for the special coverage adjustment and must seek alternative means of repair.



Link,
http://www.gmspeedometerrecall.com/


and.....Yes I do know that this thread is 1-1/2 year old