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Chevrolet TrailBlazer Speedometer



  • I recently purchased a 2005 Trailblazer with 78,000 miles on it from a local dealer. The car runs great, however two days ago the speedometer suddenly started to malfunction. It indicated that I was going 70 mph standing still and over 120 mph when I was going with the flow of traffic. After I shut off the car and restarted it a few hours later the car indicated I was going 50 mph standing still, the speedometer kept decreasing the idling speed each time I shut the car off and restarted it. Now the car is back to 0 however for how long. Also my front blower for my A/C just stopped working today. Is it possible that this too is related to the instrument cluster?
  • gmcustsvcgmcustsvc Posts: 4,057
    Hello Goodyloretta,
    I apologize that you are experiencing a concern with your vehicle. Since you just bought the vehicle did you take it back to the dealership and have them look at it? Thank you,
    Mariah GM Customer Service
  • i have a 2004 chevy trailblazer that i bought about 2 years ago. everything works great except for the most simple and important feature, the gauges on the dash. the tachometer goes crazy, the oil pressure gauge is off the chart, the battery gauge reads 0 sometimes and the speedometer works when it wants to. now, a car less than 10 years old and under 100,000 miles should not have this kind of problem in my opinion. thank goodness the gas gauge is the only thing that works right, or i'd run out of gas while driving. i was quoted at a local chevy dealer for $700 plus tax to replace the cluster, which would probably mean around $1000; i think that is unacceptable. if tahoes, suburbans and silverados are getting their clusters recalled and replaced for free, we trailblazer owners should have the same coverage. i have been a loyal gm customer, my first car was an oldsmobile, my second was a blazer and now a trailblazer. if gm won't do anything about this problem, now i understand why they dropped their slogan "mark of excellence." i have never owned a foreign car because i believed american cars were more solidly built from prior experience. this simple yet crucial component needs to be one of the most reliable piece of equipment of any vehicle, for safety's sake and the problems must be fixed before someone dies from malfuncitioning speedometers, or dies from being stranded because of malfunctioning gauges.
  • skineboyskineboy Posts: 1
    edited July 2010
    I have the same issue with my 04 trailblazer. About a year and a half ago the speedometer started acting up, working sometimes and not working other times. I called GM after doing some research and finding out about all of the recalls for the cluster on all of the full sized GM trucks. Was told the same as the rest of you, go get a diagnosis. I told them it wasn't going to happen unless they could guarantee they would pay for the dealership to tell me what I already knew. They wouldn't so I never got it diagnosed or fixed. A $100 GPS does the trick just fine rather than spending that money to have them tell me the cluster is messed up. GM is the only type of vehicle I have ever owned. This will be the last.
  • Hi There,

    I have just traded my 1995 Chevy Lumina LS for a 2005 Trailblazer LTZ. During the testdrive the speedometer/tachometer was already malfunctioning. The salesman thought it was a battery low problem, but it wasn't. Anyhow, at the end the dealer has to fix this. I do not know whether they will be replacing the entire instrument cluster or just repairing the meters, if that is possible. It will not cost me any money though. Besides I will get 4 new tires, to start with. Rest of the car is fine and I am really looking forward to it.Wonder how long it will take them to get my car ready. Depends whether they can repair the speedometer or have to order a new one from the States.

    Browsing this forum, the speedometer (instrument cluster) seems to be a common problem for Chevy trucks. I assume the original cluster is still available.


    Amsterdam, Netherlands
  • timoladtimolad Posts: 6
    NHTSA is investigating the problem with the gas gauge problem as a major safety issue. My suggestion to everybody who has had the cluster and/or gas gauge and accompanying O2 sensor problem go to the NHTSA website and enter a complaint. Maybe after investigating, they will convince GM to do a recall so those of us who have spent our hard earned money getting these repairs can be reimbursed.
  • apop1apop1 Posts: 2
    Thanks for the info on NHTSA. I called GM Customer Service at (800)222-1020 to give the benefit of the doubt since I own 2 Chevy's and used to be a Fleet Manager. They basically said there was no issued with my VIN even though I pointed out all the isssues. I then called NHTSA at (888)327-4236 and filed a complaint. Guess what, they have received a ton about the same issue with the instrument cluster and my case will be assigned with 24 hours. GM is following this blog since it is on edmunds, but I guess they aren't seeing the rest. You just lost a loyal customer and I have pointed out these issues to quite a few friends, including Fleet Managers. File your complaint, the least GM could do is help U.S. citizens who helped bail them out. Need further help email me at Sincerely, Anthony
  • tidestertidester Posts: 10,110
    email me at...

    Let's keep the discussion here so everyone will benefit. We ask that members not include their email address in postings to our Forums.

    tidester, host
    SUVs and Smart Shopper
  • It is horrendous how many posts on here are the same issue as other models that GM offered a recall for. My speedometer is out also and I have a teen daughter needing to leave for college in this car 8 hours away. We also have already replaced several sensors at various costs and an air bag coil that was 500.00. Parts to run a speedometer and an air bag shouldnt wear out, that is ridiculous. I held an extended warranty on this car until 80K miles I have 90K now) and only one sensor was actually covered. The car is serviced regularly and I dont have 1000.00 to fix a speedometer and knowing I need to buy myself a new car this sure sways me away from GM.
  • gmcustsvcgmcustsvc Posts: 4,057
    Hello Msjkl031,
    I apologize that you are experiencing a concern with your vehicle. You can you please email me with your VIN so I can look into the situation further? You can get my email by clicking on gmcustsvc. Thank you,
    Mariah GM Customer Service
  • My 2005 Trailblazer EXT speedometer is out also. For no rhym or reason it just does what it wants to while only working a fraction of the time. I see that everyone here going back a couple of years gets nowhere with the dealers or GM customer service. I need to get this fixed as I am going to sell it. Good thing is I just bought a Ford Excursion to replace this piece of crap. I have contacted the NHSTA about my vehicle. What happend to us was we were traveling on the highway and I thought I was going 70 mph but I was really going 50 mph. After a big rig almost rear ended me I turned on my GPS to see what the hell was going on and sure enough the speedo was out. Funny thing is that in 1999 I test drove a blazer at a dealer and not even a mile down the road the instrument cluster went haywire and the vehicle died. I called the dealer and had him come pick it up good thing is that it broke down in front of the Ford dealership and I ended up buying a 2000 F-150. I should have known back then to never come back but I did but I am now gone forever as a customer Government Motors.
  • Mariah,
    GM opened case 71-859421919 today. Although an independent mechanic diagnosed it, they insisted I have the local dealership do the same. I stupidly thought maybe I would get somewhere doing that as this dealership replaced my radiator, several sensors and airbag coil on my dime. 96.00 and 3 hours later they told me so sorry, we cant help you there are no papers listed on this issue even though there are a lot of people talking about this. I wont fix it, I will keep the car as I would only drive it on wekends, and I will help my daughter get a new car, and not a GM.
  • gmcustsvcgmcustsvc Posts: 4,057
    Hello Msjkl031,
    I apologize that you have had a less than optimal experience. If a recall is ever performed on that part then you will receive a letter in the mail. I apologize for any inconvenience this may have caused. Thank you,
    Mariah GM Customer Service
  • tblazedtblazed Posts: 945
    I have not read through all these posts, but has anyone searched for a remanufactured instrument cluster? I see them on ebay for around $100. If you don't want to do it yourself, then find an independent mechanic to swap it out for you, and tell GM to take a hike next time you buy a new car.

    I especially distrust GM's "100,000 mile" warranty they so highly tout. You have to drive 20,000 miles a year to get that. A recent survey on showed that 60% of people drive less than 12,000 miles a year. So GM can get out of the other 40,000+ miles by limiting the time to 5 years. Having bought GM cars since 1966, next time I will probably take a serious look at a Kia!
  • reelmnsterreelmnster Posts: 1
    edited September 2010
  • Hi There,

    Got to the dealer 2 times, but repair of the instrument cluster did not work out. Currently they have replaced it with a cluster from a 2007 TB LT, they also have for sale. I temporarily cannot use the steeringwheel buttons to access the trip and fuel settings. They have ordered a new panel from the States which has about 3 months delivery time. The panel of the 2007 is still working fine, so I am on the road again ...


  • Noticed speedometer didn't seem to be accurately registering speed on a recent trip to GA. After getting back home it stopped working - hanging around 120 mph. Husband took to nearby dealer and was given an estimate of about $650 for the cluster panel part alone. I will try calling GM to begin trying to get relief. Thank you all for posting this information. Briefly comforting to know that I am not alone with this issue.
  • cepakcepak Posts: 3
    I suggest everyone start flooding the National Highway Traffic Safety Administration (NHTSA) with complaints. Go to this website , select "Safety Complaints", then "File an Online Form". You will need your VIN to submit, but you can either get this off your TB or your proof of insurance. There are about 10 complaints filed right now, I think if we put a few hundred more, and mention that GM recalled the Suburban and Tahoe for this same reason, maybe we'll get some results.
  • dclmdclm Posts: 1
    GMC made a recall regarding the identical instrument cluster for their 2004 Sierra Pickup truck. The problem was with the speedometer and fuel gauges. Funny, how one branch of the company will recognize a problem and send a recall but the other side cannot see it.
  • lipseyplipseyp Posts: 1
    edited October 2010
    Just filed complaint. Took about 3 minutes via telephone. Thanks for all the great advice. Never get correct reading on all gauges on dash panel on my 04 TB.
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