GM Speedometer Repair
GM Common symptoms include:
- Speedometer displays incorrectly
- Speedometer stops working
- Tachometer needle sticks, jumps, or pegs out
- Fuel gauge flutters
- Entire instrument panel fails
The common cause for all these issues is a faulty stepper motor. The motor was used throughout GM’s entire production line from 2003 to 2007. For those with a technical bent, this includes the GMT800, K20, GM360, and GMX380 platforms.
Models affected include:
- Chevy Avalanche
- Chevy Silverado
- Chevy Suburban
- Chevy Tahoe
- Chevy Impala
- Chevy Trailblazer
- Chevy Monte Carlo
- Chevy Express Van
- GMC Yukon
- GMC Yukon XL
- GMC Sierra
- GMC Savana Van
- GMC Envoy
- GMC Denali
- Cadillac Escalade
- Cadillac Escalade ESV
- Cadillac Escalade EXT
- Hummer H2
- Pontiac Sunfire
How common is the GM speedometer issue?
Answer: The stepper motor at the heart of the issue was used throughout the GM line from 2003 until 2007. Our rough estimate is that this problem affects roughly 4 million cars and trucks.
How do I remove the instrument cluster?
Answer: See picture below. Removal of the cluster is a straight forward process that shouldn’t take more than a few minutes.The removal process is roughly the same for all 2003 to 2006 GM models.

1. Apply the parking brake to prevent the vehicle from moving.
2. If equipped with an automatic transmission, move the shift lever all the way down to last gear (this will allow you room to remove the bezel).
3. Tilt the steering wheel to the full down position. You do not need to remove the steering wheel as seen in the image - "Picture 1"Top.
4. Pull gently rearward on the corners of the bezel from the instrument panel assembly. There are no screws holding in place. See "Picture 1"Top.
5. Remove the bezel.
6. Remove the four (7mm hex head) screws that retain the Instrument Panel Cluster. See "Picture 2"Top.
7. Remove the Speedometer Cluster from the vehicle by tilting the bottom of the cluster outward.
8. Disconnect the Speedometer harness (2) by squezing in it's Blue top and bottom clamp tab and pulling moderately.
Mileage Correction
Yes! Prospeedo can Reset the Mileage Reading to your Requirement on 98% of all Digital Instrument Clusters you see on the market today. See Disclaimer Form below.
Digital Speedometer Programming Devices
Prospeedo Programmers are ranked number one in the Digital Speedometer industry so Don't be fooled by cheap copied versions that claim they can support what prospeedo can. Answer: They Don't even come close.
Tech Support
Prospeedo is ranked number one in the World for Tech Support. Our knowledge is second to none. Ask any other speedometer shop about Prospeedo. Answer: Yes everyone knows Prospeedo.com
Prospeedo Supports every product they sell, unlike other online Speedometer Shops that copy and paste material from our website to their own just to draw attention to their copied low buck speedometer programmers only to make a quick sale and not being able to support what they just sold leaving many dissatisfied customers on their own. It is sad to see what some people will do to make a quick dollar these days. Prospeedo is here to help you or anyone left behind. We take pride in what we do and what we can offer you.
OBD Programmers
Prospeedo's Big 3 OBD Programmer is an Excellent Choice for the beginner who is looking for something that is very fast and very easy to use. It supports the big 3 Auto Makers GM, Ford, Chrysler Etc. For more information on this OBD Programmer check out Prospeedo.com
Disclaimer Form
Please Note! You must read, print and sign our Disclaimer Form before any work will be performed. Disclaimer form must be sent back with your package.
How long does it take to fix my Speedometer?
Most Speedometers take 20 minutes up to 2 hours depending on how extensive the repair is. Any packages that Prospeedo receives go out the same day by Fedex.


