Last post on Nov 19, 2013 at 12:41 PM
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Chevrolet Tahoe, Electrical, SUV
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#279 of 456 Re: 2008 Chevy Tahoe Electrical Problems [gmcustsvcsarah]
Apr 15, 2012 (4:39 pm)
I have a 2008 Suburban LTZ I just purchased 2 weeks ago. My problems are very similar to the others listed here. First started when I was driving on the highway and used my turn signal, my radio powered down and back on by itself. Then my cruise control would just turn off while driving on the interstate. Now I am getting the total electrical shut down, all guages go dark and then vehicle seems to power back on at will. locks pop up and down, seat belt chimer starts chiming just as if I used the remote start and then inserted the key and turned it to the on position. I have had it at the dealer, tech even drove it home to try to duplicate the problem. They say they can't find a problem. I have noticed that the frequency of occurrences are when the temp outside is over 80 degrees, running the A/C and vehicle is warmed up. Also I have noticed the Volt guage at start up is reading over 14 volts and as long as it stays there it does fine but will drop down to around 11 or 12 volts after driving a while, thats when the problems occur. I just had a new alternator installed and as soon as I left the repair shop it started again.
I had a similar problem with a Cadillac STS back in 2002 and they eventually had to replace the entire wiring harness after 4 months of diagnostic. They said there was a bare wire grounding out against the frame of the car.
My vehicle has 77k miles and the factory powertrain is all that is active with the warranty.
What are my options?
#280 of 456 Re: Electrical Problems [bvilchez]
Apr 16, 2012 (10:10 am)
Please do, and thank you for your service to our country! Our email is socialmediagm.com
All the best,
GM Customer Service
#281 of 456 Re: 2008 Chevy Tahoe Electrical Problems [ck2012]
Apr 16, 2012 (10:15 am)
If you haven't already, please send an email to socialmediagm.com (include your name/Edmunds username, phone and address, the last 8 of your VIN and current mileage, and the name of your involved dealership, as well as a description of the issue and any visits you have made to the dealer for it) and we will explore any options that may be available; however, I cannot guarantee any results up front.
All the best,
GM Customer Service
#282 of 456 2008 Chevrolet Silverado Electrical problems
Apr 20, 2012 (1:40 pm)
I'm active duty Navy and just purchased a 2008 silverado ltz(last nine of VIN: 481124518) . It currently has 71000 miles on it. I was driving down the interstate when the interior gauges, radio, door locks and temperature indicator all flashed off and cut right back on. Anytime I would use the turn signal the radio would cut off and the 'Park Assist Off' would flash on. It continued to do this the whole way home (approximately 30 minutes). I parked the truck and shut it off. Let it sit for about 30 minutes and then went to crank it up. Initially it acted like the battery was dead. I tried a second time and the truck cranked right up. I haven't taken it to a mechanic yet. Help please???!!!!
#283 of 456 Re: 2008 Chevrolet Silverado Electrical problems [bran164]
Apr 21, 2012 (9:38 pm)
Bran164 – Sorry to hear of your car’s electrical problem. But even more sorry is the extremely long line of GM car/truck electrical issues (from just this forum alone) that remain unsolved and correspondingly the enormous amount of consumer time and money wasted at the GM related dealerships and other repair facilities in pursuit of fixing these problems. Your vehicle, unfortunately, is most likely experiencing a failure of the GMLAN system. While the problem is not unfixable, GMLAN is very complex and so inadequately supported by GM that probably 95% the dealerships’ service departments have neither the expertise nor capacity to diagnose and properly fix these problems, in my opinion. You only need to read a number of the posts in this forum and you will begin to understand the frustration of consumers who have spent thousands of dollars as well as weeks and even months with their GM vehicles out of commission, all because dealer service departments have misdiagnosed the electrical problems and as a result, incorrectly replaced expensive electrical components that didn’t need to be replaced and ultimately didn’t fix the problem. I hope your vehicle’s electrical problem gets fixed soon and if it is please let the rest of us know what the problem was and how it was fixed. Click on the link to get a glimpse of just some of what can be causing your vehicle’s problem.
http://www.autoserviceprofessional.com/article/92084/finding-gmlan-wiring-proble- ms (cut and paste into your browser if the link doesn't work)
#285 of 456 Return message to t Tex
Apr 22, 2012 (5:19 am)
Thank you for your response. Have you had a similar problem with your Chevrolet? With your recommendations for possible remedies, am I able take those to a dealer or mechanic and ask them to trace those?
#286 of 456 Re: Return message to t Tex [bran164]
Apr 22, 2012 (10:56 am)
Have an '09 Tahoe with same problems except no starting issues - door locks cycling, ipc malfunctions, chimes going off, park assist messages, limp mode, ac/climate control malfunction. Chevy dealer was useless. Took it to specialty auto electric shop they had it for 2 months and fixed. It ran fine for 6000 miles now its doing the same thing. If you can get a dealer to take the time to check those things listed on that link you would be lucky. You need to find a tech who will systematically go thru each component in the gmlan system to check for problems. That's the problem - no easy way to pinpoint the problem like with an engine or emissions control issue that will show up on as a diagnostic trouble code with a simple scan at the dealer or repair shop. It's going to take a class action lawsuit to get GM to own up to these problems and create a diagnostic protocol that can pinpoint these problems.
#287 of 456 Re: 2008 Chevy Tahoe Electrical Problems [ck2012]
Apr 23, 2012 (8:55 am)
I was wondering if you ever got a resolution to your electrical problem on the suburban? Sounds like you and I have the exact same situation. Any help would be greatly appreciated.
#288 of 456 Re: 2009 Electrical Problems [t_tex]
Apr 23, 2012 (9:31 am)
Thanks Tex! Much appreciated. My Tahoe was at the shop for just over 2 weeks in total. Guess I mentioned this in previous post but will post my "start to finish" in case it helps anyone.
After my vehicle started going haywire with the locks popping up and down, dashboard going dark and lighting back up etc while driving, key fob not locking/unlocking and random instances of not starting I took my car to a GM dealership to be looked at.
1)They first replaced the negative battery wire/terminal and called to say it was fixed
--I drove over and picked up my car but before even getting on the highway the computer and guages started going crazy again. So I had to turn it back in for more analysis
2)A week later I went by to speak with the service tech and go over what they were doing.
--he said that although they had replaced the negative battery terminal and wiring they hadn't reset the computer in my vehicle.(before they had only cleared the error codes but hadn't done a reset after battery wire replacement) They claimed that is the only other thing they did to fix my problem. Not a very comforting explanation but so far so good.
I have had my Tahoe back since 3/20/12 and have not had any of these issues come back up (crossing fingers)...
I do still have my 'Park Assist Off' message display about 50% of the time but I will take that any day over all the headache of the guages/computer problems that I was having.
Hoping this info might be helpful to one of you.