Speedometer spiked to 120MPH and now stuck on 60

Do you have after market tires that are larger than stock ? This will affect your speedometer.Another thing could be the speedometer gear which is easy and cheap. Its at the end of your speedometer cable inside of transfer case.

you have a common problem there was a special policy awhile back from gm for free replacement like a recall but you have to actually have a problem,your Instrument cluster is faulty and if will need replaced they do not fix them you can only have it replaced as a assembly and they are roughly $260 and it will need to be programed by a GM dealer to put your mileage in and the operating system,

Yes there is a recall for erratic gauge readings. They will supply new instrument cluster and labor to install it at no charge to you. Tell the service writer that your gauges only work sometimes and they'll help you out. worked for me!!!

your cluster is bad mine did that then stopped all together, if you have less than 75,000 miles check with dealer about the gmc recall, if your over that check out ebay for repair and replacement just make sure whoever you get it from is gonna program it to your vin and miles

Stock Tire - 245/65R17
Revs per Mile:704.3
Overall Diameter: 29.53 in 750.06 mm
Actual Speed: 60 mph 100 km/h

Tire 1 - 275/60R17
Revs per Mile:693.5
Overall Diameter: 29.99 in 761.74 mm
Speedometer1: 59.0 mph 98.4 km/h
Speedometer Difference: 1.557% too slow
Diameter Difference: 1.54%

Will fit with the stock rims.

I too have that problem. I own a 2005 GMC Yukon. Shutters between 40 + 55 mph. I thought for sure the stumble I felt was a plug or coil pack because it only does it under a load. With A/C on the whole truck shakes! But it wasnt the plugs or coil packs. Answers anyone?

There was not a recall, but there was a class action settlement where GM agreed to extend the warranty on certain vehicles for this problem. Check www.gmspeedometerrecall.com to see if you qualify.

your speedo cluster is bad. I replaced mine and then a recall came out last year(?). GMC reimbursed me for unit installed at the GMC dealership. Just need a copy of your invoice or ask your GMC dealer to complete work if recall is still in place.

have your panel changed. should be covered by recall warranty

I had the same problem with my 2004 yukon. It seems all the gauges in the insturment cluster are known to go bad from 2003-2006 in GMC and Chevys. The deaerships are trying to sell you a new instrument cluster which is pretty costly if your warrenty is up. I repaired the circuit board on my insturment cluster myself and everything is working fine now. Since hearing abouth this problem I have started repairing the insturment cluster as a side business. If your vehicle is out of warrenty and your intersted shoot me an e-mail ([email protected]).