I know everyone wants to delete their blown out autoride but my Escalade rides beautiful so I’d love to retain all of its components. Has anyone done this without issues? Plan is drop spindles up front and a 3” spring in the rear with shock extensions
Autoride isn't much of a problem, it's the Auto Level Control that can go bonkers when you lower. But, simply put, if it doesn't know the axle isn't in the original position, then it won't try to change anything.
Before you do anything, accurately mark the positions of all four sensors. Remove the two fuses for the ALC. After lowering and driving around for a while to get everything settled, make shorter links that realign the marks you made. Be as accurate as possible. I used a silver Sharpie to draw a line then used a razor blade to scratch a fine line through the center of that silver line so I'd have a really fine point of reference. Reinstall the fuses to re-enable the ALC and test.
As for Autoride, a 3" drop with 2" extenders means the shock will only "see" a loss of 1" of travel. This is nothing worth modifying for.
A rear drop does affect the front regardless of the spindles. This is why I suggested to mark and adjust all four sensors. You won't have much to adjust in the front, if any. It'll be such a small amount that you can shorten the distance by just bending the link to put a kink in it. No need to replace it with a shorter link.
If all the sensors are in their original positions, then the Autoride won't be trying to erroneously adjust the shock valving and the ALC won't be trying to lift the rear to make up for the 3" "sag".
This is my post showing the shorter link (made from 10-24 all thread rod) and realigned sensor:
https://www.tahoeyukonforum.com/threads/growing-up-doesnt-have-to-suck.93510/post-1413884