You're out of luck—I've been looking for the same thing for long time and I give up.
I haven't found a mechanic who has the knowledgeofdoing that. I know plenty of mechanics who have replaced tons of lifters on Suburbans used in TLC black car transportation on NYC, but none of them know how to disable or modify the AFM (Active Fuel Management) system. Even if you buy a delete kit and bring it to them, they have no idea how to install it. Plus, the software also needs to be updated, which most of them can’t do.
I ended up spending thousands of dollars on this piece of junk GM vehicle. Honestly, you either put up with these issues or switch to another brand.
Eventually, I taught myself how to replace the lifters. But here’s the truth: it’s not always the lifters causing the noise. A lot of times, it’s just a bent pushrod. Mechanics will often charge you for a full lifter job unless you’re standing over their shoulder the entire time.
Replacing a pushrod is much easier and doesn’t require tearing down the whole engine. If you have some basic tools, it’s manageable. There’s one bolt at the back of the engine that can be tricky, but otherwise, it’s a 3-hour job. Lifter replacements take around two days. What many mechanics do is tell you it’s a lifter issue, keep your car for three days, then just replace a $25 pushrod and charge you $2,000 for a lifter job.
If you are working in Black Car Trasportation, than you are in deep trouble like hundreds os drivers like me..
But if you DONT need this specific vehicle, than change this pice of crap GM for another brand. GM has the most stupid engineering, and they will not change, is the typical American Trush. I'm very sure by this time you already know that, that is the reason you are looking into AFM modification.