I've gone back and forth on the subject personally myself several times. Our Caprice has already had a cam/lifter replacement but our Tahoe hasn't, that I can tell. While we didn't do the AFM delete when we got the Tahoe tuned, I'm tempted to do it to the Caprice. Some of that, though is because I plan to replace the exhaust system, and think I'll be enjoying the dreaded drone if I don't. We'll see.
I think the problem with the DOD parts is when the vehicle actually goes into DOD, and not really the parts themselves. That's why I'm tempted to disable DOD on the Caprice. I think the parts are fine, there's just extra stress on things when in 4-cyl mode.
But then again, should a lifter take itself apart, I'd probably start looking for a take-out LS9. C'mon, give me a reason!!!
