08 Yukon hybrid died while driving. Won’t start

  #1  
Old 05-26-2019, 09:21 AM
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Join Date: May 2017
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Default 08 Yukon hybrid died while driving. Won’t start

I was driving at city speeds. Accelerator became unresponsive. I came to a stop. Removed the key, then inserted and attempted to restart the truck and it will not crank. 12v is good. All lights and electrical work (except time display). Do I just need a new HV battery? Thank you very much for your help.
 
  #2  
Old 05-26-2019, 05:32 PM
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Join Date: Apr 2016
Posts: 36
Default Re: 08 Yukon hybrid died while driving. Won’t start

First thing to do is connect a scanner to the OBD2 port to read any codes set by the computers. That will give clues as to what the cause of the problems is.
 
  #3  
Old 05-27-2019, 06:40 AM
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Join Date: Jul 2009
Location: Athens, Greece
Posts: 51
Default Re: 08 Yukon hybrid died while driving. Won’t start

Hi..
Have you checked to see if your vehicle has had the transmission controller changed? Some early models of 2008 hybrids had a faulty part which meant the engine would not crank, and when driving everything would come to a stop. It happened to me with my 2008 Tahoe about 6 months after purchase. In the US this is a warranty item. Once replaced the problem has not re-occurred.

Hope this helps.

Rob
 
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