New to me Corvette AFM question
Thread Starter
Cruising
Joined: Jan 2026
Posts: 14
Likes: 4
From: Forked River NJ
New to me Corvette AFM question
Hey Guys
I just purchased a 2019 Grand Sport Automatic with 6,000 miles on the clock. No matter what I read about V8's going into 4 cylinder mode isn't good. Yes I have been told to get an AFM to stop the transition and also take it to a shop that can re-program it out? Besides the fact that there are so many AFM plug in modules out there annd since I have one very unique car I don't want to F it up. Can you guys give me some direction?
Jack
I just purchased a 2019 Grand Sport Automatic with 6,000 miles on the clock. No matter what I read about V8's going into 4 cylinder mode isn't good. Yes I have been told to get an AFM to stop the transition and also take it to a shop that can re-program it out? Besides the fact that there are so many AFM plug in modules out there annd since I have one very unique car I don't want to F it up. Can you guys give me some direction?
Jack
Drifting
Joined: Jul 2013
Posts: 1,602
Likes: 798
From: Windsor CA
2024 C7 of the Year Finalist - Unmodified
I run a Range in my 2019 GS since it was a week old and also in my Silverado 1500 pick up, yes they are a bit more than the Amazon copies but that is just me. On the Silverado I found out it took the same Range product as the C7 vette so found one here in the forum used C7 section, you might check there.
I Love My C7
Joined: May 2023
Posts: 3,391
Likes: 5,322
From: Go Bucks!…
2024 C7 of the Year Finalist - Unmodified
2023 C7 of the Year Finalist - Unmodified
We run the Range in the Silverado and the corvette.
Here is the web page...you can get them on Amazon too. But you should use their page to figure out for sure what you need...
AFM/DFM Disablers - Fuel Management Disabler/Delete | Range (Official Site)
Here is the web page...you can get them on Amazon too. But you should use their page to figure out for sure what you need...
AFM/DFM Disablers - Fuel Management Disabler/Delete | Range (Official Site)
Instructor
Joined: Aug 2021
Posts: 157
Likes: 28
From: Atlanta
It's all personal preference I run the AMF delete in my car when I'm driving it hard but I occasionally take it out if I'm going to just take a cruise up the highway and I'm not going to be mashing on it. GM has had this technology for a long time I think the biggest problem comes when you jump on it hard and it's in 4CYLINDER mode but that's just my personal opinion.
Racer
Joined: Apr 2025
Posts: 490
Likes: 651
Another vote for Range. There are posts on here where Range stood behind their product and replaced defective units for free. That was enough for them to win my business. The only time i remove mine is in the dealerships parking lot.
