It is on all GM V8s except ones in the Corvette and the 4.8L and HDs
6.2L L92 gets it for 2008

I'd say DoD/AFM is on over 50% of GM V8s sold

 

The reason they don't put it on the Corvette is the same reason Chrysler doesn't put DOD on the 6.1L HEMI. When you buy a car like that, gas mileage is usually one of the last things you think of.

FWIW, I think GM would be better off spending the money on shedding weight on cars than using AFM. I know it probably doesn't take much from a research stand point, but I think the time spend could be better used to further weight loss on other vehicles.

 

I couldn't hear DoD engage on the Tahoe I tested a year ago, but when I recently tested a Silverado with the 5.3, it was pretty obvious (especially when running around with the Tow/Haul mode, which upshifted about 500 RPM higher at light throttle). The difference was the ever-so-slightly more aggressive exhaust tuning on the pickup. I imagine the situation would be worse on the Vette.

Of course, the real reason not to do DoD on the Vette is that the CAFE benefit wouldn't be worth the cost. The Vette doesn't drag down the corporate averages too much, and the volumes aren't significant.

 

I think the vette may even be CAFE positive, w/out the AFM.

 

Yes, oddly enough, after installing the intake especially, when in DoD, the exhaust got a good bit louder under acceleration. If I were to press the peddle just a little more, it would actually go faster, but be quieter... go figure, thats sound for you. I'm suprised that the Silvarado actually uses DoD while in Tow/Haul, I figured it would be like the Impala, if you put it into "3", it disables DoD.


For those who don't know.... this is what it sounds like....

http://web.camaross.com/forums/showthread.php?t=484001