Tach question

[densonfrnc]

I have a 2005 SUT The tach is acting screwey. When I start it wont go below 4000 rpm. It never drops to around 2000 where it should be?

[HUMTECH]

So is the engine revving that high or is it just the tach

[densonfrnc]

no th eengine does not rev high the tach just acts like it is

[Olfart]

More than likely the stepper motor for the tach in the instrument cluster is bad. This is a common problem with gauges in the older H@'s. My temp gauge did the same thing a while back. The dealer will want $400 plus to replace the cluster. There are a few places on eBay that will rebuild the cluster (replace all of the motors)for about $120. The cluster is very easy to remove and send out for repair and you can still drive your truck without it. I had mine done a few months ago. Try searching on here for "instrument cluster" and also on eBay.

[Olfart]

Here's the place on eBay that repaired my cluster. I had all of the motors replaced even though only the temp gauge was bad and its working great now. Only took about 5 days turn around.
http://cgi.ebay.com/ebaymotors/2003-2004-2005-06-H2-HUMMER-SPEEDOMETER-CLUSTER-REPAIR-_W0QQcmdZViewItemQQhashZitem3ca5316902QQitemZ26046 9516546QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccesso ries

There is another listing from Oklahoma that is cheaper than this one, but don't have any experience with him.