Afm not working correctly?

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BG1988

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Okay I need a little help figuring out if my afm is working properly. So I've my 2011 yukon going on 6 months, and I've noticed the only time I get the Afm to activate is around 30 to 45 mph and thats I-4 but whenever I'm at highway speeds nothing doesn't activate, Only stays in v8. I thought there was a v6 mode? Is there something wrong or is later years that it happens.

P.s I have a disabler on the way. If it's literally just the I-4
just fyi the range will change the shift points esp for the EVT gear that will change from 40mph to 48mph
 
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Amaster

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just fyi the range will change the shift points esp for the EVT gear that will change from 40mph to 48mph
I realized that. But thank you anyhow! If I start realizing troubles, I'll get a tune.
 
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CaptainAmerica1

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No sir, that motor doesn’t like 87. What you save at the pump will cost you in repairs and then some when that motor detonates itself to pieces. E85 is 100+ octane so use that instead.
 

BG1988

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No sir, that motor doesn’t like 87. What you save at the pump will cost you in repairs and then some when that motor detonates itself to pieces. E85 is 100+ octane so use that instead.
i was told the 2010+ hybrid plus was not flex fuel unless that guy lied

does the manual say it takes it??
 

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