re: Should one avoid Sierra 5.3 with AFM

+1 to what Weagle said.

If you get the system turned off electronically I imagine it’ll lower oil consumption considerably. But then again mine hasn’t ever consumed oil even when my AFM was active.

To the OP, if you installed a delete kit and got a tune I bet that motor would run forever.

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If you get the system turned off electronically I imagine it’ll lower oil consumption considerably

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I haven't looked into the specifics, but doesn't a program tell the computer to shut off the AFM lubrication system completely, and oil everything instead?

I know that the motor never goes into V4 mode so that's possible.

But the full delete kit would cover all those bases and set you up for success. Just whether or not you make the $600 investment to buy it.

Had a 99 & 04, both were anemic in the torque department. CAFE can be blamed for all of the voodoo the mfgr’s dream up. AFM was a disaster the first time it was rolled out in the early 80’s so GM thought they would fix it and sell it again.