GM technicians have been instructed to perform a series of software refreshes and then re-evaluate the condition. The bulletin specifically points outs “these conditions are not a performance issue with Transmission Control Module or transmission assembly.” A more thorough software patch should be announced shortly.
So if there are any 2020 C8 Stingray owners out there who’ve been plagued with that pesky check engine light with a reduced power warning, fear not. Your 6.2-liter V8 is just fine, as is the eight-speed dual-clutch transmission. We don’t think the eventual fix will require a recall, but if the issue does affect owners, dealers will at least know about the problem and how to fix it.