This has happened twice this year when towing my RV on a hot day. Both times left me stranded on a busy interstate and second time on a busy highway. It will not restart for about 45 minutes, then was able to drive home. The Ford Dealer could not duplicate the problem and said there are no computer codes to point to a problem. Any ideas?
GMC Q&AAsk Your Question
2007 GMC Yukon Denali Question: 2007 Yukon Denali stalls when stopping on the freeway on a hot day.
Answer #1GTurley March 11, 2014, 13:46Rookie
Did you ever get this problem fixed? I'm having the same problem while towing a boat.
Replydaledenali, March 11, 2014, 16:05Rookie
I took it to the dealer and they kept it for two days and could not find anything for sure. The one thing they thought it might be was a dirty throttle body so they cleaned that.
I have not had a problem since, but haven't been in very hot weather while towing yet.
ReplyGTurley, March 11, 2014, 16:09Rookie
Thanks for the response. I'll try that and see, Mine is suggesting to replace the fuel pump, but it sounds like others have done that and it isn't fixing the problem. I don't feel like spending $900 and it not fixing the problem.
Replydaledenali, March 11, 2014, 16:43Rookie
I think the problem is vapor lock. A part of the gas line is getting too hot and the gas is turning to vapor. After a cool down the vapor returns to liquid. GM denies any vapor lock problems.
I agree the fuel pump is a good guess, but expensive.
Another possible fix is to install a temperature controlled electric fan in front of the radiator.