GM 5.3 AFM Plug and Play Delete

Bnorth

Active VIP Member
Joined
Dec 18, 2010
Messages
10,760
Reaction score
20,775
Location
Salmon Arm
I would definitely try one but only until it's time to do delete and swap in a truck norris NSR cam from Brian Tooley.
 
  • Thread starter
  • Moderator
  • #3

Trashy

Super Moderator
Moderator
Joined
Nov 16, 2008
Messages
132,638
Reaction score
104,963
Location
Fort Macleod
I'm not interested in opening the motor. Would like to keep it in V8
 

Bnorth

Active VIP Member
Joined
Dec 18, 2010
Messages
10,760
Reaction score
20,775
Location
Salmon Arm
Does disabling help the lifters last longer or are they still prone to failure?
 
  • Thread starter
  • Moderator
  • #5

Trashy

Super Moderator
Moderator
Joined
Nov 16, 2008
Messages
132,638
Reaction score
104,963
Location
Fort Macleod
Does disabling help the lifters last longer or are they still prone to failure?
From what I'm reading, yes it does. But would like first hand experience, from someone who's tried it.
 

Stevemtb

Active member
Joined
Oct 23, 2017
Messages
81
Reaction score
194
Location
Berta
I disabled mine through a Diablo tuner. Was more pricey but also got to tinker with engine tunes and transmission shift patterns on the weak 6L80 if you have the six speed.
I was told the disabler block for the OBD just fools the ECM to prevent V4 it’s not disabling it like a tuner. You also don’t have to leave anything in the OBD port with a tuner.
As for how it all worked, yes great definitely recommend. Had 240k on mine and engine sounded like new. Neighbours had similar mileage running with AFM and you could hear the lifters. Guessing he didn’t do oil changes as often though. I figure it only cost me about 1L/100k being in V8 mode full time. Definitely worth it. The duratracs cost me more than that lol
 
  • Thread starter
  • Moderator
  • #7

Trashy

Super Moderator
Moderator
Joined
Nov 16, 2008
Messages
132,638
Reaction score
104,963
Location
Fort Macleod
I should have posted that it's for a 2017 GM
 

gedakbx

Active VIP Member
Joined
Feb 26, 2010
Messages
1,143
Reaction score
2,266
Location
central alberta
Keep us posted my 2020 has 75000 km no issues so far my neighbours 2017 6.2 had issues at 85000 km
 

MK4TDI

Active VIP Member
Joined
Dec 5, 2010
Messages
4,034
Reaction score
16,779
Location
Saskatchatoon
I should have posted that it's for a 2017 GM
Range Device or get a tune.... I tuned my 2015 to be on all 8 all the time. Still had a some lifter issues but it was on the non AFM lifters. But it wasn't until till 230,000 km then it got a new cam, and all new lifters and did the mechanical afm delete.
 

ABMax24

Active VIP Member
Joined
Sep 10, 2013
Messages
4,882
Reaction score
14,160
Location
Grande Prairie, Alberta, Canada
I'd get a tune, and make sure the tuner changes the TCM parameters to fully lock the torque converter while also disabling AFM.

When AFM is active on GM engines, the TCM is looking for a desired Torque Converter slip of 40 rpm. Even when in V8 mode the TCM is looking for a desired TC slip of 20 rpm at low load and below about 1600 rpm. This is done to eliminate drivetrain vibrations in V4 (AFM) mode, but really isn't necessary when all 8 cylinders are firing.

Obviously this is a terrible design choice, as the TC clutch packs eventually wear out due to the constant slipping. Here is some more info, it can be tuned out with EFILive and should be able to be tuned out with HPTuners as well.

 
  • Thread starter
  • Moderator
  • #12

Trashy

Super Moderator
Moderator
Joined
Nov 16, 2008
Messages
132,638
Reaction score
104,963
Location
Fort Macleod
I just ordered this one


Should show up in the next day or 2
I installed this one yesterday. As well as a new battery, as the original 2017 battery was getting week, lol.

I go 47 kms one way to work, 4 days/week. All highway.

Last week averaging 105 kph, the truck was saying 11.2/100 with AFM active.

I will know Thursday when I get home, how this "plug & play" works in V8 only and how in affects my mileage.
 
  • Thread starter
  • Moderator
  • #13

Trashy

Super Moderator
Moderator
Joined
Nov 16, 2008
Messages
132,638
Reaction score
104,963
Location
Fort Macleod
I got 1000K on now and pretty happy with it!!!

The first 4 days, I wanted to chuck it out the window..... It ate a LOT of gas an ran like sh!t, then it balanced out

Currently getting 11.3/100 and best sits at 10.5/100

Throttle response is spot on!!!!

I would recommend this product, to anyone looking at cheaply deleting their AFM
 

MK4TDI

Active VIP Member
Joined
Dec 5, 2010
Messages
4,034
Reaction score
16,779
Location
Saskatchatoon
I got 1000K on now and pretty happy with it!!!

The first 4 days, I wanted to chuck it out the window..... It ate a LOT of gas an ran like sh!t, then it balanced out

Currently getting 11.3/100 and best sits at 10.5/100

Throttle response is spot on!!!!

I would recommend this product, to anyone looking at cheaply deleting their AFM
That was likely your transmission relearning how to shift the way it should... unfortunately you can't tune the 8spd's
 
Top Bottom