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I have owned over 20 GM vehicles in my lifetime and this is the very first Dud that I have had.
I'll post status on my repairs. Please do the same on yours.
TSB #PIT-4816A
NHTSA ID #10032396
Date Announced:
APRIL 01 2011
Additional Info:
How to Fix
Summary: CHEVROLET/GMC/CADILLAC: MULTIPLE ELECTRICAL CONCERNS WITH DTC C0900 - KEYWORDS BATTERY C/K CABLE CLOCK CRANK CYCLE DOOR DIMMING FLICKER GAGE GAUGE GMC HVAC INOP INOPERATIVE INSTRUMENT INTERMITTENT IPC LOCK NO PANEL POWER RADIO STALL START
Thanks,
Mechanic tells me: When you start the truck, all "modules" come to life. When you shut truck down, all "modules" have a rest period before going into hybernation. Mechanic says that one (or more) of my modules is NOT hybernating, and since they require a 12 volt power source this is my battery drain. OBD-II diagnostics revealed a GMLAN code -- something about HIGH SPEED BUS CIRCUIT??
What is the GMLAN code? How do I fix? HELP!! Just spent $25k on this truck and feel like driving it through the showroom floor windows of the dealership I bought it at (which for now will remain nameless in the hopes they will provide some kind of assistance).
Any ideas???????
Took to parts store for load testing --Battery:OK, ALT:OK, -- took to trusted mechanic for diagnosis....
Mechanic tells me: When you start the truck, all "modules" come to life. When you shut truck down, all "modules" have a rest period before going into hybernation. Mechanic says that one (or more) of my modules is NOT hybernating, and since they require a 12 volt power source this is my battery drain. OBD-II diagnostics revealed a GMLAN code -- something about HIGH SPEED BUS CIRCUIT??
I have read multiple posts concerning this issue we are all having. Here is a compilation of fixes that other consumers have managed to squeeze out of dealers:
1) Service Update #07007B where the BCM (Body Control Module) needs to be replaced;
2) Technical Service Bulletin (TSB) 06162 which is a software update to the Body Control Module (BCM);
3) HIGH SPEED BUS BAR overheats which simulates a dead battery (this info came from a bulletin dated April 2009, but I dont remember were i found it posted)
4) Someone posted that Service Update #07007 is actually a RECALL pertaining to certain VIN#'s. I attempted to verify, but site that was linked to this information is no longer up (go Figure, right??)
HERE IS THE MOST RECENT BULLETIN I HAVE FOUND......
5) Bulletin #09-08-50-017B - Dated Feb 11, 2010
Its the rear seat heater. It does NOT to be replaced, just reprogrammed using an SPS System w/ latest software update. Applies to Escalade, Tahoe, Suburban, Yukon, Yukon XL manufactured prior to November 30, 2009. ALL affected vehicles equipped with Rear Heated Seat RPO KA6.
GM has to know what the issue is here... I just want to fix the problem, NOT sell the truck. If anyone has additional info, or has been able to resolve the issue -- PLEASE post a response !!!!!!! Feel free to email me and I will forward the long version of everything I have.
Mike D
South Alabama
2007 Tahoe LTZ. 4 times in the past two weeks now. I will park the Tahoe, and go to lock it with the remote and it will not lock. So then I go back to the vehicle to find that nothing is working. I get back in and try to turn the ignition but nothing. Like you, the battery is not the problem. Then the doors start with the clicking noise. The first 3 times this went on for a few minutes and then all of the sudden the car started and everything was normal. Tonight it happen when I got home from work and it still will not come back to life. Everything is dead. Except for the battery.
I realize that this post was from a while back and I apologize that it was missed. Have you had any success in moving towards resolving this?
Sarah
GM Customer Service
Saw another posting which implied this was a known issue, but no info on how to correct it.
Any tips appreciated.
Any updates?
Sarah
GM Customer Service
Sarah
GM Customer Service
Thanks,
Sarah
GM Customer Service
Since last December year my 2007 Tahoe LTZ has been going dead. I will park the Tahoe, and go to lock it with the remote and it will not lock. So then I go back to the vehicle to find that nothing is working. I get back in and try to turn the ignition but nothing. No lights, nothing. Then the doors start with the clicking noise. The first 3 times this went on for a few minutes and then all of the sudden the car started and everything was normal. It is not a battery problem.
On January 11th it happened for the 4th time but it did not restart. I had it towed to a service shop by my house. The shop was able to get the vehicle restarted but never could find a problem. They kept the car for a week and it did not die again. I drove it around for about another week and everything was fine until this Wednesday. I pulled into work and went to lock the car and again it was dead. This time I called the Chevrolet dealer as requested by customer care. The Chevrolet service consultant came over to my office and saw the problem as it was happening. Everything was dead and the doors had a clicking noise. After a few minutes the vehicle started up and I drove it to the dealer. Since then they have not found the problem. They just called me and said they can start by replacing the battery cables. I feel this is going to get expensive quick and they could be heading down the wrong road.
I have been emailing GM social media back and forth. So far my only complaint with them is that it has been moving real slow. On Jan 19 was my first email to them. They replied the same day and asked me to take the car to a GM dealer. I took it to the dealer and emailed them yesterday stating such and asked for a phone call. A day later (today) I get another email saying they will setup a case with GM customer Assistance but they need info to do so. I replied with info so now I am waiting. I like email and forums and all but can I please get a phone call?
Right now, I just want my Tahoe fixed. It is at the dealer now for a few days and they still don’t know what is wrong. I see other people have posted my exact same problem. What is the fix???
If anyone knows please help!
Thanks,
Steven
1. Periodically, the door locks will cycle up and down and the power on the dash (radio, etc) goes black and the vehicle sputters like it's going to die
2. After that happens, and the vehicle comes out of this state, if you smash down on the pedal the whole thing will happen again
3. Sometimes, the vehicle won't start (nothing happens)
4. The CD player sounds like the motor inside is constantly running
5. The vehicle will completely die when putting the car in park and shutting off the engine (no power....nothing)
We've already replaced the battery and still have the aforementioned problems.
TIA!
I realize it's been a month since you said that you haven't had any problems, I'm checking to see if the vehicle is still working properly? I'm heading to the mechanic as soon as I hear your response!
I have been experiencing these same exact problems with a used 2008 tahoe I just got 3 weeks ago! It has been such a frustrating ordeal. Do you mind sharing what the name of the Electronic Specialty shop was? I live in TX and want to see if I cant get my dealership's service dept in contact with the specialty shop so they might be able to stress how important it will be to check all the components as you mentioned in order to fix the problem. I took it in last week and they called yesterday to say it was ready/fixed. All that they did was replace the negative battery terminal wiring. As soon as i drove off the lot the car started doing the same thing again! Argh #BeyondStressedOut
If you could help me locate that shop i would sincerely appreciate it.
Anyone have any new ideas? I can see GM really cares about the safety of their customers.