I think all 2007 and newer gmt 900s have dod. Except for the 3/4 ton HD 6.0l trucks.

 

Not mine : (

 

6.2L doesnt have DOD

 

is there any other number to look and see if you have dod, cause were trying to figure out if my buddy has dod but there is no noticeable change in exhaust tone when going over 60 mph?? but in another friends it change on and off with that drone, and both are 08 5.3 texas edition trucks.

 

if its a 5.3L it has DOD
if its a 6.0 i could have DOD or VVT depending the model
6.2 have VVT

look at the valley cover if there is a PVC tube in the valley cover then it doesnt have DOD if its a rigged valley cover then you have DOD

 

There is no downside to removing it...as long as you keep your foot out of it, you can get better gas mileage on pretty much any vehicle.

 

if your gonna baby the truck why change cams? if so just keep it stock

 

Thanks for the tip on the 6.2l I guess now I know. Eny way speeking of D.O.D my 09 sierra 5.3l has the instint econimy meter i notice it says v8 mode or v4 mode depending when you give more gas or let off the gas or are at a stedy speed or on a decline of a hill. eny one els play with that or know of it?

 

you have DOD on your 5.3 thats why you have the 4cyl an 8cyl mode on your DIC.

 

New Denali's are 8 cylinders 24/7, we 5.3 owners got the damn 4 cylinder mode, and I'm telling you, if ur facing the wind and you got an exhaust system installed, the sound is crap, shifting between 4 to 8 all the time... with a noticeable poping into the muffler lmao.