Updated: Jan 13
This is everything you need to delete the DOD/AFM on GM Trucks.
The AFM (Active Fuel Management) Or DOD (Displacement on Demand) System available on 2007+ GM Trucks works by disabling 4 out of 8 cylinders via Special Lifters that Deactivate according to oil pressure. These lifters are known to fail sometimes at very early mileage.
Brian Tooley Racing - Cam Dynamics NSR (No Springs Required) Camshaft
LS7 Valley Cover
LS2 Timing Chain Tensioner
ARP Cam Bolt set LS1
LS3 Camshaft Timing Gear 4x Reluctor - 3 Bolt
5.3 Lifter Trays (x4)
The Cam Choice is obviously up to you however I decided on this one, 1. for price, and 2. for the fact that it doesn't require Aftermarket springs, as it maintains a stock lift of .500" but also provides some overlap and a performance boost. Some common cams for this mod are used LS6 or LS9 Cams.
This mod will require cylinder head removal, total time for me was about 12 hours spread through 2 days.
The truck will also require a tune after the mod has been done. You will want to adjust idle and airflow for your cam as well as Disable DOD in the tune.
Have any questions?
Let me know down below!