🔧 ACDelco 504 535 Specialty Shock Absorber: Premium Performance for Ultimate Dampening Review

Best Air Spring for Jimmy or Blazer. The air valve on the damper is rotated down to make room for the air line fitting. On other brands the valve sticks out straight and it is difficult to get the plastic air lines into the valve and when you do this on others the line almost buckles because it is very close to the body. They are custom made! Very happy with the install.

Used these on my Blazer to help with old sagging leaf springs. Put in about 70psi and that's it. About 3 weeks later I noticed my car was sagging again and checked the pressure. It was 0. Set 70psi and I could hear it leaking out of my side shock. Oil also leaks out from the side. I have contacted AC Delco and have not yet received a response. Like most AC Delco stuff. Don't waste money.

Fits my 2007 Chevy Colorado 2.9L 4cyl 2WD CrewCab 5 foot bed and front coil spring. Easy installation. Two screws at the top and 1 screw at the bottom on each side. The truck did not have to be jacked up. Bought this primarily to flatten the rear end from GM sag. Sits nice and flat, maybe a little higher in the back, at 100psi with no load but with duvet on. The trick is to find a high pressure pump that can reach higher PSI levels to balance the towing capacity.