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Old 05-29-2016, 08:59 PM
Jimmy4445 Jimmy4445 is offline
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Re: 2005 Yukon XL Denali P0300 Code

Quote:
Originally Posted by gmtech1 View Post
The 6.0L is very sensitive to build up in the throttle body, causing rough idle/misfire conditions. I'd check and clean the throttle body and see if that helps.
Thanks for the suggestion.

I gave the throttle body a good cleaning today. Despite the fact it was very dirty it did not fix the stumbling trying to find gear.

I guess next I'll look into a vacuum leak somewhere, then dirty or bad injectors.

Still getting only a p0300, nothing else, so if anyone has any ideas I'd love to hear. Maybe the camshaft position sensor?

Thanks in advance.
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