hey there guys.. 2 questions here.. how do u knw that ur truck has DOD (4 and 8 cylinder modes ) should it say flex fuel? or not..

what are the pros and cons vs keeping and disabling it..

Ahmad.

 

Its actually called AFM... active fuel management... if u have that u have DOD...

 

get rid of it!
theres a parta list that you need to get to get rid of the DOD...good luck

 

if you have it, there is a notice in the drivers info center when it kicks in.
says 4cyl mode or something like that.

advantage, slightly better fuel economy
disadvantage, truck sounds like crap running on 4cyl if you have performance exhaust

it can be disabled in your tune with hpt

 

is disabling it with a tune the same as physically removing it with parts?

 

nope
the DOD lifters cant handle a cam unless the cam is spec'd for DOD which i dont see a point in.

change all 16 lifters, 4 lifter trays, 2 head gaskets, crank bolt, head bolts

 

the yukon denali doesnt have DOD right?

 

According to the GM specs it does...
http://archives.media.gm.com/us/powe...k/10_L94_n.xls

What's interesting is that 2009-2010 SUV and Trucks show a different engine code. Truck have and L99 and SUV's have a L94. L94 data sheets shows "Active Fuel Management as an option. In 07-08 all SUV and trucks had L92.

 

i cant tell you...my 6.2 has VVT but im
changing lifters anyways bc its only advised to run to 5900rpm. im
spinning 6200-6300 depending where my cam stops pulling.

 

' Get rid of the dod ... Those dod lifters suck' they are engine killers' I had my dod. Removed from my tunner ' but those lifters cannot handle above 6000 rpm' eventually failing at high lift cam and rpm's .. Change to ls7 lifters and valley cover