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2007 Tahoe P0300 rough idle then goes into reduced power

  

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2007 Tahoe 5.3 auto, owned since new 235K been a great SUV. P0300 code random misfire all on bank 1. Goes into reduced power, hard shift, service Stabilitrak/Traction control. I have tryed every thing I can find on YouTube, Blogs even had a so called Machanic look t it for 3 weeks.

So my question is: What will cause a random misfire all on bank 1 and then trip reduced power S/T etc.

Thanks Scotty your the BEST. Kevin Aloha


2 Answers
1

A lot of things. Could be a failed control module.

You need a high diagnostic scan that will tell you more.

You could also have more than one problem.

Check out our FAQ for the misfiring.


1

Check out SMA.

Chevy Suburban 5.3: Entire Bank Misfire - YouTube


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