Range device
Team Owner
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
It has a hypothesis but there is no way to prove it one way or the other. IIRC, manual cars also have had lifter failure so..... My Diablo I3 will do that, make the engine run a bit better (so some have said), firms up the shift and adjust the throttle tip in a bit. More expensive but does way more.
Drifting
Joined: Jan 2014
Posts: 1,569
Likes: 594
From: Jefferson City Missouri
I installed my Range device one week after I took delivery of my 2019 GS on October 2, 2018. I leave it plugged in except when I have to take it to the dealership. I usually remove it about 2 days before my appointment. No issues and no V4.
Team Owner
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
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Team Owner
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
IDK about sound since I have mine set on Stealth Mode always but perhaps the issue isn't spending time in V4 mode as much as switching over because GM couldn't and/or wouldn't design a proper system?
Advanced
Joined: Oct 2025
Posts: 71
Likes: 79
From: Pleasanton, CA
Team Owner
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
When I had it, I know for sure that when I hammered it, there was no issue. From what I see, it only engages when it is on light pedal or cruise and in both cases, I really don't care since it doesn't limit the power when I want it.
Last edited by aklim; May 19, 2026 at 07:38 PM.
Advanced
Joined: Feb 2026
Posts: 81
Likes: 25
IIRC, I had to look to know before I shut it out by the ECM program. I wasn't ever sure if I could tell it without looking for it which meant a prejudice. I obviously couldn't do a blind test.
When I had it, I know for sure that when I hammered it, there was no issue. From what I see, it only engages when it is on light pedal or cruise and in both cases, I really don't care since it doesn't limit the power when I want it.
When I had it, I know for sure that when I hammered it, there was no issue. From what I see, it only engages when it is on light pedal or cruise and in both cases, I really don't care since it doesn't limit the power when I want it.
If the engine fails because of switching in and out of afm you will probably care. 🫥
Le Mans Master
Joined: Sep 2006
Posts: 9,602
Likes: 970
From: Palm Harbor not far from Sebring Florida
St. Jude Donor '11
Oldtimer
I was run the car in the Manual mode and paddle shifting because I had the dreaded shutter. Once I had the trip flush done it correct the shutter, so I just drove it in the Auto mode, but I was worried about the AFM and wiping out a lifter and cam, so I bought the Range device. My son has less miles on his GMC Denali and it got his lifters and cam. Luckily, he has a full engine warranty, so it cost him nothing and they gave him a brand-new Denali to use. So I recommend getting one.
Race Director
Joined: Feb 2001
Posts: 11,382
Likes: 2,112
From: Grapevine Tx
2018 C3 of Year Finalist
2016 C3 of the Year Finalist
Team Owner
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
I was run the car in the Manual mode and paddle shifting because I had the dreaded shutter. Once I had the trip flush done it correct the shutter, so I just drove it in the Auto mode, but I was worried about the AFM and wiping out a lifter and cam, so I bought the Range device. My son has less miles on his GMC Denali and it got his lifters and cam. Luckily, he has a full engine warranty, so it cost him nothing and they gave him a brand-new Denali to use. So I recommend getting one.
