Disable AFM w/o Range

pickupman87 · December 13, 2017

Hello,

I'd like to disable AFM on my pickup (2014 Silverado, 103k miles) but I don't want to use a Range device. I've tried 2 different Range units and both caused me headaches with service this or service that lights coming on the dash.

I'm assuming I need to get a tune from what I'm reading, but I don't quite understand how that actually works. I'm not looking for any performance changes etc, just AFM disabled.

Thanks,

Pete

Sierra706 · December 13, 2017

Leaving it in 5/6th or 7/8th gear, using a range device, or using a handheld tuner to disable AFM are the 3 ways to go about it. You can use the tuner strictly to disable afm without adjusting other parameters but whatever you do will be detectable to a dealership if they look hard enough.

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jhbrennan · December 13, 2017

4 hours ago, pickupman87 said:

Hello,

I'd like to disable AFM on my pickup (2014 Silverado, 103k miles) but I don't want to use a Range device. I've tried 2 different Range units and both caused me headaches with service this or service that lights coming on the dash.

I'm assuming I need to get a tune from what I'm reading, but I don't quite understand how that actually works. I'm not looking for any performance changes etc, just AFM disabled.

Thanks,

Pete

You might need a current version of the Range device - they will update you to the newest one at no charge. Check the FAQ on their website.

Paintor · December 13, 2017

Unplug the vacuum pressure sensor on the brake booster.

AFM wont come on. You will get a message to service brake assist.

There's a cheap route....but bigleaguechews suggestion of not using Drive and using Manual-5 instead is better....if you dont drive on the highway.

Lgetz · December 13, 2017

Leave the transmission in manual mode M5. AFM will not activate. I do this on my 8 speed in M7 and only click up to 8th gear when I am over 65 mph on highway.

pickupman87 · December 13, 2017

Thanks for the replies. I've done the M5 thing for a while but the vast majority of my driving is freeway, 65mph+.

I sold my Range devices a while ago so I can't send them back. All the different errors it was throwing randomly put a sour taste in my mouth to the device.

The truck is past its 100,000 mile warranty so I'm not terribly worried about the dealer being able to tell something was modified. If I did a tune, what would be the simplest option to delete the AFM?

BlackBearPerf · December 13, 2017

1 hour ago, pickupman87 said:

Thanks for the replies. I've done the M5 thing for a while but the vast majority of my driving is freeway, 65mph+.

I sold my Range devices a while ago so I can't send them back. All the different errors it was throwing randomly put a sour taste in my mouth to the device.

The truck is past its 100,000 mile warranty so I'm not terribly worried about the dealer being able to tell something was modified. If I did a tune, what would be the simplest option to delete the AFM?

Hello, we can do a full tune for you with our AutoCal, and disable the AFM within the tune as well. Send us an email [email protected]. We would be happy to help.

Grumpy Bear · December 13, 2017

2 hours ago, Paintor said:

Unplug the vacuum pressure sensor on the brake booster.

Is that signal used by the ECM or CCM for any other function?

Sierra706 · December 14, 2017

Thanks for the replies. I've done the M5 thing for a while but the vast majority of my driving is freeway, 65mph+.

I sold my Range devices a while ago so I can't send them back. All the different errors it was throwing randomly put a sour taste in my mouth to the device.

The truck is past its 100,000 mile warranty so I'm not terribly worried about the dealer being able to tell something was modified. If I did a tune, what would be the simplest option to delete the AFM?

Most cheap handheld tuners have an option to do it. Or you could just go with black bear and let them tune your truck while their at it.

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Colossus · December 14, 2017

Have blackbear do it and tune the truck. You'll be smiling.

Ozer · January 18, 2018

I have this http://www.autoanything.com/performance-chips/truxp-xtune-plus-performance-tuner

It lets you disable it, also you can change tire size if you went larger, can change shift points, rev limits and so on. Reads and deletes codes.

Also comes with few tunes, im trying the 87 tune now and can feel the shifting difference and it feels like its little more peppier from start.

pickupman87 · February 23, 2018

I just wanted to follow up on this.

About a month ago, after a lot of thought, I decided to go with the AutoCal / Black Bear Tune on my pickup. Poor luck with RANGE devices is ultimately what made me go this route.

I know everyone says it on here, but until you drive the truck before and after, it's hard to describe the change - and I mean that in a good way. I didn't want a race truck, frankly my goal was only to turn off V4 mode however I asked BlackBear to make some modest changes to help the overall driveability. Not only did they eliminate AFM but the engine, transmission, and gas pedal finally feel like they're on the same team and working together. I've got 105k on the truck and it drives better now than it ever did. The whole process took a little over a week from when I ordered AutoCal to when I got my files back and loaded on my truck.

Thanks again Justin and Jarrad w/ BB for making my truck a pleasure to drive.

Pete