I bought a used 2011 Silverado that had just had a new engine put in at 100k miles. After finding out about the problems with that active fuel management (is that what the thing is called where it goes from 8 cylinders down to 4 cylinders?) I sent in my computer to some guy that disabled it. Now it runs on 8 all the time.
It wasn’t that much to disable it. Maybe $50 to the guy, and another $50 to FedEx. Probably isn’t worth doing on an old engine. My truck had a new engine with only 8000 miles on it.
Wow that’s cheap. The going price around here is 500 dollars. I’m going to attempt it myself first.