2008 Yukon Electrical Problems

[jpwood21]

I have a 2008 yukon with 86000 miles on it. I baught this with 60000 miles right at one year ago. It has been in two different GM shops with the same issue four times now. I can shut the car off and get out, then I realize there is no power what so ever. Nothing will work, no lights or anything. i can pop the hood and move the bottom power wire that goes from the positive battery post to the under side of the 175 amp fuse and all power comes back. One Dealer said it was the battery so I had them put a new one in. Then it happened again and another dealer said that bottome wire was loose and on backwards on the fuse. Then again, I just moved the wire and kept driving, then it happened again. I took it to the dealer again. They said the positive wire to the fuse was "bad", and the 175 amp fuse was "bad". They replaced both of them, and I drove home. Then it done the same thing. They don't know what it could be, has anyone heard of this? Also when it does this, every single time the radio goes off and comes back on a few times after it happens, and the AC/Heat goes crazy. Sometimes it will blow cold on one side and hot on the other, or change the temp from 60 to 74 on both sides, and change from the Panel only to the panel/feet. This makes no sense. I am so frustrated with this car and feel that there is no where to turn.

 

[HUNT4WHEELS]

It sounds as if the computer needs to be flashed or you have a bad ground somewhere.

 

[jpwood21]

The dealer updated something for the AC but that did not change anything.

 

[GM Customer Service]

jpwood21,

I am sorry to hear that you have been experiencing multiple issues with your vehicle. I would like to look into this further for you. Could you please send me your full contact information including your VIN and mileage?

Thank you

Elizabeth, GM Customer Service

 

[InTruckDesign]

I would look into a loose wire on the starter solenoid and also possibly could be a bad BCM(body control module).

 

[sonlight]

I am having similar issues with my 08 tahoe Z71. its happened at least 8 times were i will be driving and i will lose all power to my gauge cluster, my door locks start to lock and unlock on their own, the nav radio goes black and then tries to restart. When i pull over and turn the truck of, it goes completely dead. Then out of no where, power resumes like nothing ever happened. That takes anywhere from 5 minutes to 16 hours. Its been to the dealership 3 times and they keep telling me that if the truck doesnt fault in their possession, there is nothing they can do. I am extremely frustrated because not only is my family truck unreliable, but I have to hear it from my wife who is the everyday driver of it Any advise would be greatly appreciated

 

[Modded]

You guys may need your BCM re flashed, or replaced if that does not work.

 

[mike1944]

I had an Audi that did this trick. I would be driving along and it would just stop. All systems off. Dealer was clueless, finally I had to leave it and they left it running in their lot. They finally gave up and replaced the computer and that fixed it.

I also had a Vette that when I first bought it, it was very iffy electrically. Lights would dim, radio start doing weird things. Somebody told me to clean and really tighten down my battery cables.... worked. They were tight...just not tight enough.

 

[GM Customer Service]

sonilght,

I am sorry to hear that your dealership is unable to recreate the issue. Have you asked your dealership if they would take your vehicle overnight and run some tests on it to see if they can recreate the issue?

Thank you

Elizabeth, GM Customer Service

 

[sonlight]

Elizabeth,

They actually had it for 2 night the second time, which in turn i replaced the battery because they said that COULD BE the problem, then the third time they kept it for 3 nights and replaced the 2 connectors for the rear tail lights because they said they were corroded adn the ECU runs through them...When the problem happens and the truck power returns, when the dealership connects to read the computer, it comes up as "communication failure." I just dont know what to do at this point..

 

[GM Customer Service]

sonlight,

I would like to have another team look into this for you. Could you please send me your full contact information including your VIN and mileage?

Thank you

Elizabeth, GM Customer Service

 

[ROBDOG]

On my 2007 Yokon the same thing i think is happening:

Start the car fine drive it to work cut the engine and pull the key out the radio still plays....when i open the door it DOES NOT shut off the radio.

Nothing has been doon to it ...it just started a week ago
yesterday i put in a new battery because the 4-5 orignal was weak....but it still does!!

Any help
Thanks!!!

 

[AF_Writer]

I have an 08 Tahoe and am experiencing this same issue.

It started a couple weeks ago when the battery wouldn't start. I was able to jump it, and it drove fine for a couple days, then while I was driving one day, all the electrical displays in the dash and stereo began to flicker and when I turned off the car, it wouldn't start again.

So I had it towed to the dealer, they said it was a bad battery. A week later, the same thing happened. I had it towed back to the dealer, they charged the battery and said everything looked fine. I drove it back home, turned off the car, tried to restart it and it wouldn't start again.

Same thing, I had it towed back to the dealership, and now they're saying it's starting fine for them and they can't find anything wrong with it. It really sounds like something's draining the battery when the car is off.

Have you guys got your issues resolved, and if so, what did the dealer do to correct it? I have to drive from Maryland to New Hampshire next week, and I need this car fixed asap.

 

[GM Customer Service]

AF_Writer,

I am sorry to hear that you are experiencing this issue. Have you had your technician ride with you to see if they can recreate the issue that way?

ROBDOG,

Have you consulted with your dealership to confirm the issue?

Thank you,

Elizabeth, GM Customer Service

 

[AF_Writer]

AF_Writer,

I am sorry to hear that you are experiencing this issue. Have you had your technician ride with you to see if they can recreate the issue that way?

Elizabeth, GM Customer Service

No, I haven't thought to do that. He told me early yesterday that they'll keep it another day to see if they can find any issues, so I should be picking it up today. I tried calling in several times to find out what exactly they've tested or troubleshooted on the car, and I can't get ahold of my technician.

I want to make sure they've tested the car with a voltmeter to see if there's any drain coming when the car is turned off. Also, it sounds as if flashing the BCM has worked for some people, too.

What I haven't been able to find in all my searches on the internet, however, is a definitive solution to this problem. It sounds as if it's a widespread issue, and I just can't believe GM hasn't found a standard fix for this issue, let alone issued a recall.

 

[GM Customer Service]

AF_Writer,

I am sorry for the delay in response. I was out of the office. Did you get your vehicle back? If so, is everything fixed? The only way to issue a recall is to have documentation of the issue at the dealership. I have noticed a lot of people on the forums I monitor don’t really like visiting the dealership. So if they don’t, then that is one less person that the dealership has documentation of that is experiencing the issue.

Thank you,

Elizabeth, GM Customer Service

 

[amighjm6]

EXACT same issues on my 08 tahoe. i've been working at it for 8 months to find the cause...nothing yet. the dealer had it numerous times, they are clueless. anyone have any luck find a fix yet?

 

[GM Customer Service]

Amighjm6,
Would you like to PM me your VIN number, mileage, and complete contact information(name, address, phone number, and email address) I would like to look further into this for you.
Breanne
GM Customer Service

 

[rxrep]

Hello all. Hate that my first post to forum is this. Same issue here. 2011 Denali. Bought new March 2011 with 10 miles on it. 12k now. Sometimes out of nowhere the factory NAV/Stereo will shut off and turn back on. Sometimes the gauge cluster dims and flickers. In those instances the vehicle continues to run. Sometimes the whole vehicle shuts down and the door locks lock and unlock repeatedly. It has yet to last longer than a few seconds, but it could happen in the middle of a highway at full speed.
It always seems like some sort of electrical short. Throws no codes. No predictability. No mechanic or dealer can duplicate it, of course.
Really is sad that I can't take the thing anywhere because I never know when it's going to happen.

PS- And I haven't even gotten in to the cold start noise the thing makes. Sounds like quarters in a clothes dryer. Noisiest valve tapping-like sound. But that's another issue.

 

[snaward]

I'll add in that my 08 Denali w/ 65k miles is having the same problems. It never happens at the dealer so they don't know what to do. Other forums are reporting similar electrical symptons also.

Sounds like GM needs to step up the plate and get an expert technican/engineer to solve this issue so the dealers will know what to do when they don't get an error code.