GM Dealer cannot fix my vehicle

[jdbuckshot]

I have a 2008 GMC Yukon - bought it used with 80,000 miles.


its been at the dealer for 6 weeks, it will intermittently not crank. It just goes completely dead, no dome light, no radio, absolutely nothing. Then other times it will work great, and it will sit over night and draw the battery completely down, with no key in the vehicle.



My mechanic here is a retired GM service manager / master mechanic and he said it had to go to the dealer.

Its been at Nelson Hall Chevrolet in Meridian - They have been nothing but great to deal with. they are working very hard to get it fixed, but have not got there yet.

They recommended that I call GM and talk to customer service.

I did call GM customer service and filed a complaint - they issued me a claim # and the dealership is supposed to call them to see about getting better diagnostics.




My last conversation with the service manager did not leave me with a lot of confidence that my vehicle is going to get fixed any time soon or even at all.


what are my options here - I mean i really don't know what to do, i have a 25,000 Yukon that is inoperable - am i going to just have to sell it for scrap ?

[edub20]

may try taking it to someone that specializes in tracing electrical wiring. Sounds like for whatever reason you have a circuit somewhere that's not closing properly. Darrel's auto electric in Brandon is well known for being able to trace and pinpoint issues with electrical problems in vehicles.

They're located in Brandon off of 471.

[jdbuckshot]

its been to two places before it went to the GM Dealership - both said it had to go to the dealer because they were the only ones with the codes to re-program.

[edub20]

its been to two places before it went to the GM Dealership - both said it had to go to the dealer because they were the only ones with the codes to re-program.

So has any of those places stated that they hooked up a meter to look at potential power draw when the vehicle is off? Have you recently installed anything new in the vehicle such as trailer wiring, tv/sound, or even something as simple as 12v adapters?

[edub20]

found this...


#PIT4816: Multiple Electrical Concerns With DTC C0900 - keywords battery c/k cable clock crank cycle door dimming flicker gage gauge gmc hvac inop inoperative instrument ipc lock no panel power radio stall - (Feb 27, 2009)


Subject: Multiple Electrical Concerns With DTC C0900
Models: 2007 -2009 Cadillac Escalade, ESV, EXT

2007-2009 Chevrolet Avalanche, Silverado, Suburban, Tahoe

2007-2009 GMC Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL

(Equipped with Gasoline Engines)

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:

Some customer may experience one or all of the following concerns.
1) Intermittent No Crank or No Vehicle Power ( The customer may get the impression that the vehicle actually has a dead battery )
2) Volt gauge fluctuates, and seems to decrease when a high load accessory is turned on ie.. headlamps, wipers
3) IPC backlighting flickers or IPC goes blank
4) Diagnostic Code: B1325 set in several modules followed with a Dtc: C0900 set in the EBCM.
5) Radio clock resets
6) Intermittent Stall
7) Hvac temperature actuator defaults to hot
Door locks cycle
Recommendation/Instructions:

If you experience one or all of the following concerns and a cause for the concern can't be identified, please check the following items:
1) Remove the 175 amp Mega fuse and inspect for arcing, if any type of arcing is found replace the effected components.
2) When re-installing the 175 amp Mega fuse, torque fasteners that attach the mega fuse to the positive cables to specification in SI.
3) Check the voltage drop reading on the positive and negative battery cables. The voltage drop should be performed with the fuel injectors disabled and while cranking the engine. The voltage drop should not exceed 200 mV. If the voltage drop is above 200 mV, replaced the effected cable.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

[jdbuckshot]

found this...


#PIT4816: Multiple Electrical Concerns With DTC C0900 - keywords battery c/k cable clock crank cycle door dimming flicker gage gauge gmc hvac inop inoperative instrument ipc lock no panel power radio stall - (Feb 27, 2009)


Subject: Multiple Electrical Concerns With DTC C0900
Models: 2007 -2009 Cadillac Escalade, ESV, EXT

2007-2009 Chevrolet Avalanche, Silverado, Suburban, Tahoe

2007-2009 GMC Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL

(Equipped with Gasoline Engines)

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:

Some customer may experience one or all of the following concerns.
1) Intermittent No Crank or No Vehicle Power ( The customer may get the impression that the vehicle actually has a dead battery )
2) Volt gauge fluctuates, and seems to decrease when a high load accessory is turned on ie.. headlamps, wipers
3) IPC backlighting flickers or IPC goes blank
4) Diagnostic Code: B1325 set in several modules followed with a Dtc: C0900 set in the EBCM.
5) Radio clock resets
6) Intermittent Stall
7) Hvac temperature actuator defaults to hot
Door locks cycle
Recommendation/Instructions:

If you experience one or all of the following concerns and a cause for the concern can't be identified, please check the following items:
1) Remove the 175 amp Mega fuse and inspect for arcing, if any type of arcing is found replace the effected components.
2) When re-installing the 175 amp Mega fuse, torque fasteners that attach the mega fuse to the positive cables to specification in SI.
3) Check the voltage drop reading on the positive and negative battery cables. The voltage drop should be performed with the fuel injectors disabled and while cranking the engine. The voltage drop should not exceed 200 mV. If the voltage drop is above 200 mV, replaced the effected cable.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

Dealer has done this........

[SCOOTER]

He's in Tupelo but almost know he can fix it, only does elect stuff on trucks and cars

Auto Electric Albert 662-842-9246

[tdog]

Have a friend with a 07 with the same exact issue, he had it in the shop 20+ times. Finally figured out if he turns the air/heat off before he kills the truck in never happens.

[Po Monkey Lounger]

Had a 2000 Tahoe that started having these same type of problems after 125k miles, and after it was almost paid up. I hated to get rid of it, but finally gave up on getting it repaired and traded it in for a new truck. I spent a lot of $$$$ trying to get it fixed at the Tupelo Chev dealership ( F Blackmon) and other auto repair shops in that area. No one was ever able to fix it.

A vehicle that is unpredictably prone to going dead and being unable to crank wouldn't work for me.

Have not purchased another GM vehicle of any type.

[eSJay]

electrical problems in vehicles will drive you bat $hit crazy. they are very very hard to root cause & countermeasure, especially if they are intermittent.
pick a day when it's "being good" & let carmax take it off your hands.

[edub20]

electrical problems in vehicles will drive you bat $hit crazy. they are very very hard to root cause & countermeasure, especially if they are intermittent.
pick a day when it's "being good" & let carmax take it off your hands.

A while back our Nissan Pathfinder started exhibiting symptom of random failure to crank even though it spun over perfectly strong. I threw every code reader/live data reader and what knot at it and never found the root cause UNTIL we went on vacation this year and it finallllly threw a code. Camshaft position sensor was at fault. Once I replaced that "illegitimate child" (had to remove the intake to get enough room to feel it on the back of the head) it's 100% reliable now. There was no way to know what was causing it until the dam thing finally threw/set the code.

You are right that sort of trouble shooting will drive you crazy.

[ScottBrown]

This is a shot in the dark but I was having a very similar issue with the wifes GMC. New battery, new alternator, performed the parasitic draw test multiple times and never made any progress.

I wound up buying new side terminal bolts from walmart for $5 bucks and have not had another problem out of it. I think one was stripped or not making a constant connection and that was causing the problem.

It is worth a try.

[JDgator]

Whatever you do, don't let them just start picking and replacing components. A couple of hours of diagnosis should find the intermittently failing circuit.

[7ducks]

This is a shot in the dark but I was having a very similar issue with the wifes GMC. New battery, new alternator, performed the parasitic draw test multiple times and never made any progress.

I wound up buying new side terminal bolts from walmart for $5 bucks and have not had another problem out of it. I think one was stripped or not making a constant connection and that was causing the problem.

It is worth a try.

^^^^this. Same fix for my sons Truck no more problems

[tobydawg]

This is a shot in the dark but I was having a very similar issue with the wifes GMC. New battery, new alternator, performed the parasitic draw test multiple times and never made any progress.

I wound up buying new side terminal bolts from walmart for $5 bucks and have not had another problem out of it. I think one was stripped or not making a constant connection and that was causing the problem.

It is worth a try.

^^^^this. Same fix for my sons Truck no more problems

Had the same issue....the terminal was stripped and a slightly larger diameter or coarser threaded bolt was the fix if I recall.