Jetfire6

The latest on my truck is they are taking off my Borla exhaust and replacing it with the OEM which won't do anything.... If disabling the AFM only drops my MPG a mile then I would do, 3-4 miles per gallon then I would go get a 3/4 ton of some sort.. Thanks for the feedback guys, I will let you know what happens.

You're a helpful one aren't you? I get 20-23 mpg with this truck and maintaining what I get is important to me. I pull a 19' Ranger, and a 21' Yetti fish house so I need the truck.. Can you tell me the effect disabling the AFM has on MPG's? That would be more useful than your above post.

My 2016 Denali 6.2L/8sp started the AFM shake (rumble strips) at 30k miles... it's now at the dealer for the 2nd time, they couldn't get it to repeat the condition the first time. The service manager right away said torque converter, then they changed their tune and are blaming the GM Performace center designed Borla exhaust... Borla is awesome, they are sending a new exhaust to prove it's not their product. The dealer says there's a problem and my truck is throwing several codes, but aren't sure what the issue is... I guess the exhaust is them trying to eliminate a cause. Anyone know how this is going to play out? Am I pretty much screwed, and stuck with the shake monster? P.S. Deactivating the the AFM is not an option, I need the fuel efficiency since I drive 50 miles to work..