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I have the above vehicle with the 5.3L engine. If I want to leave my truck running in Park, it shuts off automatically after about 20 minutes. The dealer says I have to pay about $300 for a software change to defeat this timeout. This seems insane to me. Does anyone else know of a different way? I tried the method of holding in the ignition button for an extended period but that didn’t work.
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My brand new Acadia does the same thing. Was going to ask how to stop it from turning off by itself.
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Hope this helps
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Thanks Parts Man but the extended park is different than the auto shut down. Auto shut down works when the transmission is in drive. I want my truck to stay at idle while in park.
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Sorry, I thought it said it worked for both.
Curious, why do you want your truck to idle so long?
Try this..
https://www.youtube.com/watch?v=I1bPvSgXWJM
There is also a TSB to remove this function. TSB#21-NA-228. Your dealer can do this and I’m sure there will be a charge
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