Jump to content

2020 Misfire and KR Issues

Brandon Clounch
 Share

Recommended Posts

Brandon Clounch New Member

Brandon Clounch

Posted
Posted

I just purchased a 2020 GMC Sierra last weekend and had several issues with misfires and KR with less than 3000 miles on the truck. Wondering if there were some quality control issues at the plant as I've seen some other posts on various boards. 
Attached is a data log showing what is going on. I have some serious KR and misfires on Cyl 8 during cruise. Took it in last week for P0300 and they did a cam relearn. Its back at the dealership this morning with the same issues.

Not sure what normal vacuum is for these trucks, but mine does seem to be very low at cruise and idle.

Data Log.xlsx

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
 Share
Go to topic listing


×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.

  I accept