Misfire code on C7 only at sustained HWY Spds 60 mph? No adverse pwr fluctuation on 2007 Chevrolet Trailblazer SS

This happens after driving 60 mph for 30 minutes or longer. There is no adverse power fluctuations.

Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
Upper induction service should do it.