How do you tell if your prom is stock?

[ZR-1 Mack]

Originally Posted by WB9MCW

my guess is that u got a mod chip already! Does the cags still function? cags is the 1-4 forced shift by solanoid activated shifting guide 1-4 gear for get this economy to make cafe etc. and avoid the gas g, tax! heywhatdidyathimk of the BIG MOUTH AIR DAM

Tom and Bryan thanks again for the info.

I couldn't wait any longer , so I opened up the ECM and sure enough the chip is a DELCO AXFK 0277. Gotta be stock. Probably will change it out this spring. Now I just gotta decide which one to get.

The CAGS must be disabled as I have the light on the dash but no limitations in shifting thru the gears from 1st to 4th.

Bryan I've seen the ones that go in the front license plate holder, but that design has gotta work alot better. Let us know how it works out on your car .