IS AFM DISABLEMENT NECESSARY??

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

MrMonte

Full Access Member
Joined
Jun 23, 2022
Posts
204
Reaction score
505
I turned off the AFM via a tune on my 2018 Yukon Denali, use Mobil 1 oil & OEM filter every 5-6K miles. I still had an AFM lifter fail at 82K miles then did a cam/lifter upgrade deleting the AFM system. Now at 115K miles and enjoying the extra power & better mileage. I did a 2k mile road trip last month and averaged 21.2mpg with avg speed of 79mph. I'm running 305 summer tires that are 33" tall which did hurt my mileage some. My speedometer has been adjusted to match a GPS.

My son had an AFM lifter fail at 115K on his 2015 Yukon Denali.
 
Last edited:

Forum statistics

Threads
132,069
Posts
1,861,877
Members
96,534
Latest member
jack004

Latest posts

Top