Tachometer not working please help. (Full Version)

Chevrolet >> Chevy Trucks, Vans & SUV's >> Trailblazer

Tachometer not working please help.

  

fdxdoeboy -> Tachometer not working please help. (1/6/2007 7:47:04 PM)

I have a 2004 trailblazer v6 with 40k,  I just noticed that the tachometer is not working.  The car does seem to hesitate at times happens about 2 to 3 times per day.   I'm thinking its a sensor of some sort, checked it with my obd tester and I am not getting any codes.  Wondering if anyone has any idea as to what this could be.  Thanks alot. 

  
nellee26 -> RE: Tachometer not working please help. (1/8/2007 12:52:54 PM)

Check out the post I left about the speedometer on this forum for trailblazers, they said they were seeing tachometer and speedometer problems on these vehicles. Hope this helps.

04extv8 -> RE: Tachometer not working please help. (1/10/2007 9:41:36 PM)

I had the same problem with mine, at first the needle kept sticking so it looked like I was taching at 8000. Then it stopped moving all together.  Lucky enough, mine was still under warr. when it happend.  They had to replace the cluster asy.

gmpartsland -> RE: Tachometer not working please help. (1/11/2007 9:02:37 AM)

Just like everyone else has stated your going to need a new cluster. Most gm dealers can get you a exchange cluster for half the price of a new one. They will have to install it due to the fact it needs to be programed.

tazordep -> RE: Tachometer not working please help. (11/16/2007 9:10:12 PM)

I had the same problem, but it was coupled with the check engine light coming on. I took it in to the repair shop and they told me the light was due to the fan clutch being close to "going out". I replaced the fan clutch myself for about 1300 dollars less than the $1600 they quoted me. The fan clutch cost about $200.

Anyway, the rpm (tach) gauge was sticking too. It would eventually work its way back to zero and work fine for a few days all the while jerking its way up and down the gauge until it would freeze on the gauge somewhere between 5 and the letters RPM.

After I replaced the fan clutch the light was still on. So I took it to the nearest Autozone and they ran a code check (read) and said the cooling fan module was out. I replaced that at around $50 and the light went off.

I was told the instrument panel would have to be replaced to fix the RPM problem, but it's been 4 weeks since I fixed/replaced the cooling fan clutch and the RPM is working fine. Before it would only work a few days at a time. Just a thought. Hope it helps.

tazordep -> RE: Tachometer not working please help. (11/16/2007 9:12:09 PM)

by the way....all the other gauges worked fine, just the RPM was acting up.

  

Page: [1]

Return to Chevrolet Forum home page or view the Full Version of this page.