Last post on Nov 02, 2012 at 5:41 PM
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Chevrolet TrailBlazer EXT, Electrical, Transmission, SUV
#265 of 280 2005 Chevy TrailBlazer Speedometer not working.
Jan 30, 2012 (9:22 am)
I am wondering if someone can help me. I have a 2005 Chevy TrailBlazer with 86,500 miles and the speedometer is not working properly. The speedometer doesn't register the speed properly as it goes past the 120mph and sometimes goes straight down to the odometer reading. When I come to a stop, it stops at 70mph. When I start the vehicle, it goes down 5mph to 65mph. I have to keep starting and shutting off the vehicle in order for it to go back to zero but does this at 5mph increments. Once it does, it will work for awhile and then it will go back to improperly working. I noticed I started using the cruise control more because I do some highway driving. Could the cruise control be the cause of it? Should I disconnect the battery to reset the computer so that it can work properly?
#266 of 280 Re: 2005 Chevy TrailBlazer Speedometer not working. [raypass]
Jan 30, 2012 (10:46 am)
I have this same problem. I don't think it's the cruise control b/c I never use mine and my speedometer does the exact same thing. I have found that when I go at a higher rate of speed (highway driving) this is when it messes up. I live in the city so it hardly ever messes up just driving in town. Unless you want to pay around $500 you are just going to have to live with it. That's what I'm doing. : (
#267 of 280 Re: 2005 Chevy TrailBlazer Speedometer not working. [raypass]
Jan 30, 2012 (2:37 pm)
This is the same exact thing that happened to a 04 TB I had. I, also, had to keep starting the vehicle in order for the speedometer to go to 0. Anyways, I ended up getting it fixed and it was the instrument cluster motor that was causing it. Has nothing to do with the cruise control. I also did the battery disconnect thing and it would work fine for a couple of weeks but always went back to getting stuck. When this happened to me, my TB was only 3 years old and 10,000 out of warranty. I wrote GM a letter and they actually covered half of my repair which at that time came to 450 dollars. GM knows there is a problem so you might have some luck getting a hold of them. I tried the email thing and the phone calls but it was the letter that got their attention. I was told to do this by a lawyer friend of mine. He said that letters always end up on someones desk when emails go unnoticed and never get read. I took his advice and got 225 dollars out of the deal. However, with your vehicle being 7 years old now, I dont know if GM will do anything. Good luck...let me know how it turns out.
#268 of 280 erratic speedometer
Jan 30, 2012 (2:57 pm)
I have a simple solution to save money on a repair. Buy a GPS as they tell you your speed on the screen. This may be hard if you live in areas where cars are broken into and the GPS are stolen,but if you guard it well and take it with you when you leave the car you will be OK. My wifes Jeep has a built in Nav system that tells the speed.
#269 of 280 Re: 2005 Chevy TrailBlazer Speedometer not working. [rpleb35]
Feb 06, 2012 (3:58 pm)
GM has no intentions of voluntarily fixing this problem.
#270 of 280 Re: 2005 Chevy TrailBlazer Speedometer not working. [raypass]
Feb 07, 2012 (6:52 am)
It's the stepper motors on the back of the cluster, a known problem that has been discussed here many times. You have three basic choices:
Have the cluster replaced - expensive
Remove it yourself, send it out to be repaired (google "trailblazer instrument cluster repair) - less expensive, but you need to get it out and back in yourself
Remove it and replace the stepper motors yourself (you need to have soldering skills) - least expensive
#271 of 280 Re: 2005 Chevy TrailBlazer Speedometer not working. [dll66]
Feb 19, 2012 (4:26 pm)
I called Gm after reading this forum and you are right. They won't fix it.
I was told it was normal wear and tear. My Spedometer??? 5 years old has expired? I told the GM person, "I 've gotten more use out of my curling iron everyday for over five years and it cost$25.00 with a one year warrantee."They won't do anything. It's not safe driving and not knowning your speed. I've had the gas guage thing too. Emmissions light and faulty gas cap. Thanks
#272 of 280 Re: Part 2, GM does Nothing [tidester]
Mar 18, 2012 (5:47 pm)
I know this feeling we bought our 2007 trail blaser in 2008 and the gas gauge never worked then about a year ago they had been recalled but they said that they would only pay half to get it fix. Seems to me if it is a recal and they screwed up they should fix it
#273 of 280 Trlblzr speedometer -CHECK SPEED SENSOR
Apr 01, 2012 (12:52 pm)
Replying to this GREAT answer from 2009 (see IVAN10)on the issue of Chevy Trailblazer speedometer wigging out. My 2005 Trailblazer EXT started acting up about a year ago after taking a long trip. Thought it was the cruise control but it effected the speedometer incorrectly registering what speed we were going. Then my check engine light started to come on. BOTH ISSUES were intermittent. Finally called my niece's husband in VT (Chevy auto mechanic) and he suggested what IVAN10 has stated. Get that speed sensor replaced. Its a heck of alot easier to replace (and cheaper) then the IC cluster everybody keeps talking about. The dealership will most definitely go with that option first since it is FAR more expensive. Thank GOD for these blogs since we have to fend for ourselves....GM isn't go to help us! But PLEASE CONTINUE TO BUY AMERICAN!! We've got to save ourselves...and our country, too.
#274 of 280 2003 Chevy Trailblazer speedometer malfunction
Apr 02, 2012 (10:51 am)
Speedometer issue just happened to me last night in TN/KY hills. Watched the speedo cruise past 120! With engine off stays at 65. Having just read all previous posts I've come to 2 conclusions...1) I'm THANKFUL for my 1998 Honda Accord with over 197,000 miles (and NO MAJOR PROBLEMS) and 2) Looks like I'm gonna have even more FUN THINGS to look forward to with my Trailblazer! Since it is only my speedometer that's wacked, is it the stepper motor more than likely?