It looks like you're new here. If you want to get involved, click one of these buttons!
Welcome to the Edmunds forums! We are changing the way you sign into our forums. Click here to learn more.
See Official Rules for eligibility and other requirements.
6.0 Liter Chevy HD 2500
My new 2500 chevy started knocking at startup at about 11,000 miles. The dealer said it was carbon build up. It started again 2,500 miles later. The dealer now says GM is not covering this because it is a maintance item. It Knocks for 2 minutes at startup. Please help with any suggestions.
This discussion has been closed.