2011 Yukon XL Denali

[txwhaler76]

I'm looking at a used yukon xl with the 6.2l engine for my wife and I was wondering if this model has AFM or not. We haven't had a chance to look at the vehicle in person yet, so I'm not sure if this one does or not. I have always heard that the 6.2l are good engines, but I though they didn't have AFM until recently. I saw somewhere online that the denali's had it though. Can someone help me out? Is this a good car? It has about 55k miles on it. I had a 2009 sierra with the 5.3 that had a lifter issue and I traded it in for a 2014. I don't really want to buy this car if I am going to have that issue again. HELP!!!

 

 

Larry

[txwhaler76]

Ended up pulling the trigger and bought the Yukon. Love everything about it so far, but did notice when cruising when the afm kicks in and out there is a small change in RPM's and I can feel it when driving. Should I buy a tuner and disable the afm? I'm not worried about the effect on gas mileage, I just want this engine to last a long time.

[Juukyj]

Range AFM Disabler, I just bought one today. Or a blackbear tune. My lifter's & camshaft are being replaced for the 2nd time in 7k miles (not what you want to hear)... so my AFM is getting shut off.

 

Clean your throttle body.

 

This is a good read on AFM.

 

From the above article.

 

"In the LH6, the transition from eight-cylinder operation to four-cylinder operation is aided by electronic throttle control (ETC). At no time does the driver perceive a decrease in engine power when in V-4 mode because ETC applies a seamless increase in manifold pressure. (Translation: when the engine switches to four cylinders, your foot is still pressed the same amount on the gas pedal because the computer has opened the throttle more without you knowing it.) An increase in power demand is just as smooth; there is no dramatic surge in power during transition to V-8 operation beyond what is expected, that's because the ETC closes the throttle in conjunction with cylinder activation."