2008 GMC Yukon Hybrid codes.

  #1  
Old 12-15-2018, 06:53 PM
Enthusiast
Thread Starter
Join Date: Dec 2018
Posts: 4
Default 2008 GMC Yukon Hybrid codes.

Had this vehicle for about a week. Bought it well below NADA so I thought I would give it a try.
4th day it kicked up the CEL and some codes. 5th day the same. Both were after a 45 mile drive to a neighboring town in mid morning. Both times the codes popped up on the start of the drive home in the late evening.
I'll post some screen shots.
thanks for helping out.






 
  #2  
Old 12-15-2018, 07:43 PM
Ridiculously Active Enthusiast
Join Date: Sep 2014
Location: Mesa, AZ
Posts: 2,926
Default Re: 2008 GMC Yukon Hybrid codes.

https://www.greenhybrid.com/forums/f...22/index7.html

Read everything Hillbilly says.

Those combinations of codes are almost certainly the hybrid battery.
 
  #3  
Old 12-16-2018, 06:25 AM
dnt1010's Avatar
AutismSpeaks Advocate
Join Date: Oct 2018
Location: TN
Posts: 160
Default Re: 2008 GMC Yukon Hybrid codes.

I am very interested in the diagnosis and successful repair, please follow up and let the forum know.
If I were you, right now I would be researching every known 2008 Yukon Hybrid TSB (possibly std Yukon TSBs) just to eliminate things like the wire chaffing issue.
Obviously the traction battery is suspect but that is one expensive piece to choose to "part change" with LOL .
 
  #4  
Old 12-16-2018, 07:48 AM
Ridiculously Active Enthusiast
Join Date: Sep 2014
Location: Mesa, AZ
Posts: 2,926
Default Re: 2008 GMC Yukon Hybrid codes.

Rather than a shotgun blast search of desperation fueled by hopeium to try and identify a failure mode that has never happened before, invest in the $5 software a $20 code reader and almost any Android phone/tablet made in the last 5 years and LOOK INSIDE the battery:

https://www.greenhybrid.com/forums/f...results-31736/
 
  #5  
Old 12-16-2018, 10:07 AM
Enthusiast
Thread Starter
Join Date: Dec 2018
Posts: 4
Default Re: 2008 GMC Yukon Hybrid codes.

After removing the plastic and carpet panels and vacuuming the fan intakes. Intakes a little blocked .
This morning no start and "Service Hybrid Battery"
No codes.
Guess it's time to research batteries.
Thanks all I'll let you know if the battery cures everything

Update. The master battery disconnect lever wasn't pressed all the way down well. Discovered that when I took it out and put it back in. When pressing the lever down after rocking it up, it went down farther than it did originally.

I was able to start it up and drive it. Drove up the street to the big church parking lot and drove around till I got the temp up to normal operating temp. During the many stops to enter auto stop and accelerate forward trying to keep it under battery propollsion as long as possible I had the vehicle die and come to an abrupt stop. It did this on my wife the second time it kicked a code.
It restarted ok and I continued with the stop and starts. Tried to die once more but didnt. Sometimes it wouldn't even make it to 10 mph before the ICE would kick in while being very gentle on the accelerator.
I think the writing is on the wall but I'm still playing with it.
 

Last edited by newlintl; 12-16-2018 at 11:28 AM. Reason: New info
  #6  
Old 12-17-2018, 12:28 PM
Hillbilly_Hybrid's Avatar
Ridiculously Active Enthusiast
Join Date: Sep 2009
Posts: 881
Default Re: 2008 GMC Yukon Hybrid codes.

That is NOT a happy battery!
 
  #7  
Old 12-17-2018, 04:16 PM
Enthusiast
Thread Starter
Join Date: Dec 2018
Posts: 4
Default Re: 2008 GMC Yukon Hybrid codes.

Hillbilly
Its not happy because of what I was doing to it or because its terminal?
thanks
 
  #8  
Old 12-22-2018, 08:00 AM
dnt1010's Avatar
AutismSpeaks Advocate
Join Date: Oct 2018
Location: TN
Posts: 160
Default Re: 2008 GMC Yukon Hybrid codes.

Would be great if you could get the readings from inside the battery. Looks like the best tool is an actual GM Tech2 scanner. I am seeing some alternatives but it looks to involve a lot of research to pull together all the pieces/parts and then fiddling with PID codes to make it work and the results appear to be only marginal. I may just order myself a Tech2 for Christmas.....................
 
  #9  
Old 12-22-2018, 05:40 PM
Enthusiast
Join Date: Nov 2018
Posts: 1
Default Re: 2008 GMC Yukon Hybrid codes.

Originally Posted by dnt1010 View Post
Would be great if you could get the readings from inside the battery. Looks like the best tool is an actual GM Tech2 scanner. I am seeing some alternatives but it looks to involve a lot of research to pull together all the pieces/parts and then fiddling with PID codes to make it work and the results appear to be only marginal. I may just order myself a Tech2 for Christmas.....................
http://a.co/d/bn9hxEf

This was my solution to Tech 2 functionality, without the Tech 2 price $$$
 
  #10  
Old 12-30-2018, 08:52 AM
Enthusiast
Thread Starter
Join Date: Dec 2018
Posts: 4
Default Re: 2008 GMC Yukon Hybrid codes.

New Hybrid battery solved the problem it appears. Running flawlessly.

Now to replace one of the TPMS sensors.

Thanks
 
Related Topics
Thread
Topic Starter
Forum
Replies
Last Post
carnationautosales
GM Hybrid Trucks, Cadillac Escalade Hybrid, Chevrolet Tahoe Hybrid & GMC Yukon Hybrid
26
01-21-2019 08:13 PM
bharani
GM Hybrid Trucks, Cadillac Escalade Hybrid, Chevrolet Tahoe Hybrid & GMC Yukon Hybrid
19
11-29-2018 08:32 AM
khaled
GM Hybrid Trucks, Cadillac Escalade Hybrid, Chevrolet Tahoe Hybrid & GMC Yukon Hybrid
1
10-25-2013 06:22 AM
jimmystartup
The Market
0
07-29-2012 06:09 PM
macmtr
GM Hybrid Trucks, Cadillac Escalade Hybrid, Chevrolet Tahoe Hybrid & GMC Yukon Hybrid
17
09-25-2009 04:09 PM


Thread Tools
Search this Thread
Quick Reply: 2008 GMC Yukon Hybrid codes.


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.