Last post on May 23, 2013 at 11:54 AM
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Chevrolet Tahoe, Electrical, SUV
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#291 of 418 07 tahoe won't start, fob and interior locks don't work
Apr 28, 2012 (3:57 pm)
Let me first say I love my Chevy's. I have had 3 and never a major problem. A 97 Silverado with 150K miles that I traded in for a 2003 model that I still have after 9 years with only 62K miles.
I also have a 2007 Tahoe, bought it new and only have about 32K miles on it. About 6-10 months after having we did seem to be coming to a dead battery a few times. We thought maybe the son was leaving the interior light on or leaving his DS plugged in or something like that. After a few times of this happening we finally took it to the dealer. They looked at and didn't find anything wrong with it. Perhapas they updated some of the software at that time because we never had the problem again.
It was a typical Sat. morning today. Went to get my haircut and while in the barber chair my wife came in to tell me the battery was dead. I sadi sure it is. Low and behold when I went out there it was as dead as a doornail. Not thinking about the battery, I left the key on for the wife so she could listen to the cd. I even think the ac was on low speed. The doorlocks on the fob and interior locks wouldn't work. Rear door won't unlock either. We had someone try to give us a jump but it did nothing. It didn't even put a drain on the other car. I figured it was the battery and it had finally died since during the winter it was a little sluggish/slow when cranking up the tahoe. We pulled the battery and went to Autozone, got the battery and installed it. Now everything was working from what I could tell except the door locks and it wouldn't crank or even turn over. I did notice that when we would open a door or tried the fob sometimes we would hear a click sound somewhere near the engine. We had it towed to the local dealer since their service dept was still open. The service guy did hook up his little scanner somewhere under the steering wheel and told us there were no codes. They said they would look at it Monday morning.
So hear starts our story. I will definitely wait to see what the dealership says first but I will definitely tell them to make sure the software is up-to-date, inspect the wiring harness, look closely into the GMLAN wiring system. I have also read that it could be the starter relay or the GM High Speed LAN Resistor. I hope I don't get stuck with some large bill that doesn't even fix the problem permenantly.
#292 of 418 Re: 07 tahoe won't start, fob and interior locks don't work [ut_texan]
Apr 30, 2012 (6:59 am)
I hope that everything goes well with your dealership! Please post an update on the progress there with your Tahoe, and if we can be of any assistance we can be contacted at socialmediagm.com
GM Customer Service
#293 of 418 heard from dealer
May 01, 2012 (10:53 am)
They say it is the BCM and want to charge me $545 for it. they said everything else tested fine. they have been looking at it for 2 days. Headed there now to review the diagnostics and check to see if they updated the sw for the tahoe and perhaps try to get them to replace the resistor.
#294 of 418 results from dealer on no start issue
May 01, 2012 (1:47 pm)
Service foreman said this was the next logical step. the BCM wasn't communicating so it is at least fried. I still feel like they are grasping at straws at this point and hoping this fixes the problem but they won't know until they replace it. So far the toal bill will be $545 plus tax.
He told me the BCM was solid state and nothing could be replaced in it when I mentioned the terminating resistor for the GM Hispeed LAN. He also said there were like 4 resistor modules. I didn't really follow what he was saying or necessarily trusted it.
My biggest fear is that this isn't the real problem and that I don't wany my family to be in danger because the vehicle might fail again but this time fail while it is in operation.
#295 of 418 Re: results from dealer on no start issue [ut_texan]
May 02, 2012 (6:46 am)
I understand why you're apprehensive; have you decided to have the BCM done? Please keep in touch with us in regards to how your vehicle operates after the replacement. If this doesn't turn out to be the root of the matter, we'd be happy to look into this further.
GM Customer Service
#296 of 418 Re: results from dealer on no start issue [ut_texan]
May 02, 2012 (7:19 am)
ut texan - The service foreman telling you that replacing the BCM was "the next logical step", is a good illustration of how poorly GM techs are trained and equipped to diagnose and electrical problems in their line of cars and trucks. That was the first thing replaced in my Tahoe and it wasn't the problem. In fact as I later found out the BCM is rarely the problem - it is the "gateway" to the gmlan system and handles most of the low speed lan functions although there is a high speed lan port that interacts with this module. You could get lucky and this could be the problem. However, this is the problem that is so frustrating with GM - there is no quick and definitive way to diagnose what the real problem is, if there is an electrical problem that is affecting mechanisms and processes that are linked to the gmlan system. It takes an immense amount of diagnostic work to peel the onion back to find the root problems of electrical malfunctions in vehicles equipped with gmlan. And I also have another Tahoe (07) besides my 09 and it doesn't have and never has had an electrical problem, so I assume that the majority of gm vehicles don't have gmlan problems but the ones that do have a problem seem to be almost "unfixable". Or at the very least, it takes an immense amount of time and money before the dealer tech gets lucky and stumbles on to the solution to the problem.
#297 of 418 Re: results from dealer on no start issue [t_tex]
May 02, 2012 (7:42 am)
thanks, that is my main concern. He tried to talk around me in circles and tried to make me feel like I had no clue as to what I was talking about. I know my way around a vehicle pretty well. I have replaced intake manifold, carb, head, pulled an engine, put one in, replaced axles, rear gear, drive shafts, starters, etc and I know when it comes to a problem in the eletrical system it could be almost anything like a bad ground, bad solder, pinch in a wire, short, and so on.
To me this is like having a problem on your computer and the technician tells you to re-install the operating system. It is a hail mary pass that is a huge cost when other components are much cheaper and could be the problem.
This is my family vehicle and luckily this happened when it was parked and I was with them. My wife will freak and be very upset if this happens with her and our son.
#298 of 418 Re: results from dealer on no start issue [gmcustsvcsarah]
May 02, 2012 (7:50 am)
Yes, they are replacing the BCM and said my Tahoe would be ready this afternoon IF they don't find other issues. I was very concerned when he told me he has seen issues where a battery drain or dead battery could damage the BCM. I don't have a deep wallet to have a $545 service done everytime this happens if it continues to happen. Like all the other posters I don't believe this is an isolated issue and believe GM should be covering my repairs under warranty. We had this battery drain issue after we got the Tahoe (within 10 months) and took it in to be checked.
#299 of 418 Re: results from dealer on no start issue [ut_texan]
May 03, 2012 (1:18 pm)
They replaced the BCM in the tahoe for a total of $569. So far so good. I am a little considered about my battery gauge because it has bounced around from about 12 to 14 during identical situations and things running or not running. I will continue to monitor things over the next few weeks.
May 03, 2012 (5:42 pm)
Just spent 3200 bucks to fix suburban. The instrument panel went out. Brakes, steering, water pump. Seems like a lot of dough.