GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER

What tunes should I use? Need to turn off AFM

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by slimcubby, Mar 21, 2013.

  1. Kapelusprime

    Kapelusprime New Member

    Joined:
    Nov 27, 2011
    Messages:
    66
    Likes Received:
    0
    I've held back on the intune tuner myself for the same reason, I was a Ford dealer tech and I know we could see a lot more than people thought we could. I was told by diablo reps they leave no water marks but, I know GM better than that and figured the data logs were deeper than tune guidlines. Your post proves it; Any links to the range module you sited? I see your link above, but on the link you post the only thing I can see that module doing is increasing the use of AFM. I want to shut it off, my dealer said they could not when I asked.
    #21
  2. ahmitchell1

    ahmitchell1 New Member

    Joined:
    Sep 3, 2009
    Messages:
    1,106
    Likes Received:
    0
    I've never had an issue with getting warranty work done on my truck and I leave my tune on. But as I've said before we have a great relationship with our dealership
    #22
  3. f5fstop

    f5fstop Former Member

    Joined:
    Mar 14, 2013
    Messages:
    13
    Likes Received:
    0
    This thread is about the AFM shut off capabilities of the Range module.
    http://www.gm-trucks.com/forums/top...etter-fuel-economy-for-afm-engines-the-range/

    The techs will not check for a tune or check the log files unless GM requests it and GM will only request it for major engine work such as replacement, rebuild, etc. I cannot see them questioning the tune of a water pump goes out, or a throttle body requires replacement, etc. only because it would be hard to document how a tune could cause those types of failures.
    #23
  4. PantheraUncia

    PantheraUncia New Member

    Joined:
    Dec 13, 2011
    Messages:
    1,032
    Likes Received:
    1
    Bose thinks they make speakers, Ever since I heard bose car audio speakers, they were one of the first things to get replaced in the vehicle.
    #24
  5. Steelo1

    Steelo1 New Member

    Joined:
    Jan 27, 2013
    Messages:
    6
    Likes Received:
    0
    My Bose speakers sound awesome! You guys with low oil pressure readings, have a look at the oil sending unit, and the screen in the manifold. My sending unit was bad, and the screen clogged. I replaced those and my truck runs like a champ. Back on topic, the Diablosport Intune has the capablilty of turning off DOD. I leave mine on. This little handheld is truly a nice product.
    #25
  6. tbplus10

    tbplus10 Moderator

    Joined:
    Mar 14, 2007
    Messages:
    5,405
    Likes Received:
    25
    I tried manual shift mode on my 2011 and it still went into 4cyl AFM mode, I also tried tow/haul hoping that would lock it out but no luck.
    #26
  7. BigBlueLB756

    BigBlueLB756 New Member

    Joined:
    Dec 11, 2009
    Messages:
    273
    Likes Received:
    0
  8. CKNSLS

    CKNSLS New Member

    Joined:
    Oct 9, 2011
    Messages:
    158
    Likes Received:
    1
    Try it again. Put it in manual 5 and the AFM should not go on. This is the first I have heard where a truck is not operating properly in manual mode.
    #28
  9. Sierraowner5.3

    Sierraowner5.3 New Member

    Joined:
    Apr 2, 2011
    Messages:
    1,950
    Likes Received:
    4
    M5 the AFM should not turn on, M6 it will.

    Alex
    #29
  10. tbplus10

    tbplus10 Moderator

    Joined:
    Mar 14, 2007
    Messages:
    5,405
    Likes Received:
    25
    Tried it again on my way home from work and it still kicked into afm while I was in M5 off to the dealer we go on Monday morning.
    #30
  11. Adam @ Range

    Adam @ Range New Member

    Joined:
    Apr 4, 2013
    Messages:
    108
    Likes Received:
    0
    Hey guys:
    Adam from Range here. We're a vendor on this forum now. If you have any questions, please let me know.

    Adam
    Range Technology
    www.rangetechnology.com
    #31
  12. BigBlueLB756

    BigBlueLB756 New Member

    Joined:
    Dec 11, 2009
    Messages:
    273
    Likes Received:
    0
    Do yourself (and your truck) a favor by checking out The Range Technology V8 AFM Eliminator module. Plain and simple, it works.
    #32
  13. JimmyA

    JimmyA Member

    Joined:
    Jan 21, 2013
    Messages:
    278
    Likes Received:
    0
    I am using a SCT GM preferred and it works well to turning off the AFM, DOD and many other options! http://www.sctflash.com/
    #33
  14. mellis

    mellis New Member

    Joined:
    Jan 18, 2014
    Messages:
    1
    Likes Received:
    0
    I have a 2014 5.3 Sierra. Putting shift lever into M5 mode DOES prevent the cylinder deactivation mode. Keeping it in M5 mode keeps the truck in V8 mode 100% of the time; which I prefer when driving below 60 mph.

    When I get on hwy, I push the + button to go to M6. It will then allow the cylinder deactivation to act normally. When I get off the hwy, I push the - button to go back to M5. It then operates in V8 mode, and still operates as an automatic transmission in 1-5 gears.

    My question is... Does cylinder deactivation hurt the engine? I'm reading a lot of posts about oil burning. I'm considering the AFM Range in order to disable the V4 mode completely. Any thoughts?
    #34
  15. Cowpie

    Cowpie Member

    Joined:
    Jun 2, 2013
    Messages:
    221
    Likes Received:
    0
    I put the Range on my 2013 the day after it came home, new, from the dealer back in early June. I had seen tons of issues that folks had posted regarding AFM problems. Many TSB's out from GM on how to address engine issues, that seem to be directly attributable to AFM.

    But the AFM thing went against everything I hate. Guess it is my upbringing, 7 years in the military, and other experiences, that make be uneasy about some cylinders working while others are out on a smoke break. I realize that the government has had a big influence on GM in the last few years, but I am not going to have my engine acting like government workers, where 4 stand around goofing off while the other 4 work. I dissolved that "union contract" in my engine and demand that when I turn on the key, all cylinders are required to "pack the gear" and work as a team. I paid for 8 cylinders, and I expect them all to work. That is how engines are designed.

    I am reminded of a Star Trek movie, where they stole the original Enterprise and the new Excellsior star ship was going to give chase but conked out. Scotty is heard commenting "aye, the more complicated the plumbing, the easier it is to stop up the drain". This whole AFM thing brings a level of complexity to the engines that is unnecessary and shows no appreciable return for the design cost. It was done merely to placate some government dweebs. Many who have shut it off have reversed oil consumption issues and have not experienced any mpg hit for doing so. And of all the posts I have read about shutting it off, I have never read of a single occurrence where someone regretted it.

    How you go about it... tune or Range... just do it! You will not regret it.
    #35
  16. summitwhite11

    summitwhite11 New Member

    Joined:
    Oct 1, 2013
    Messages:
    392
    Likes Received:
    1
    The custom tunes are awesome, I myself was just looking to turn off the AFM system , so I went with the Range Technology device, its simple plug n play, and that's all it does, I really like mine, the truck is just smoother doing down the road.


    #36

Share This Page