Did 2007 Denalis have AFM in the 6.2 ?

[avalonandl]

Question for the engine geeks. Did the 2007 Denali with the 6.2 engine have Active Fuel management in the engine? Thanks...

 

[swathdiver]

Question for the engine geeks. Did the 2007 Denali with the 6.2 engine have Active Fuel management in the engine? Thanks...

The very earliest engines had AFM hardware but it was not active in the tune. I think these motors were made before April 2005 or 2006, don't remember. You can tell whether an engine has it or not by looking under the intake at the valley cover. If it is flat, no AFM. If it is lumpy with raised passages, that's the VLOM for AFM. Again, it's not active in the tune in those early motors.

 

[Big Mama]

^^X2 I have that rig no active afm. Thank goodness

 

[avalonandl]

Thanks guys/gals...

 

[BG1988]

^^X2 I have that rig no active afm. Thank goodness

AFM is only bad if you refuse to change your oil...

 

[91RS]

The 07-08 L92 and 09-10 L9H don't have AFM. The 10-14 L94 does. All have variable timing.

 

[Big Mama]

AFM is only bad if you refuse to change your oil...

Only going by what I hear. Is that true? Not changing oil is the culprit ? Wonder why so many seek to disable it?

 

[Kraig]

Maybe if you max out the oil intervals, use marginal oil, and a cheap filter, you increase the odds (or rather the time until) of it failing, but it’s an electro/mechanical system—it IS going to fail eventually.

 

[mikeyss]

AFM is only bad if you refuse to change your oil...

I agree that oil changes are really important in AFM engines, but oil isn't the only issue. The metal used in the lifters also flake off and trash the cam, and the PCV system doesn't help either.

 

[91RS]

Only going by what I hear. Is that true? Not changing oil is the culprit ? Wonder why so many seek to disable it?

It’ll only prolong the inevitable. My uncle bought his Silverado new in 2008 and the oil was changed every 5k and it started using around 80k miles. He got 45k out of the Goodyear LS2 tires because we rotated them and kept it aligned properly but we couldn’t stop the oil consumption.