I used them several years ago, but they would not hold up for my use, but were a lot better than Edelbrock IAS which lasted about 7,000 miles before blowing. Rancho 9000 went about 15,000 miles for me. Good shock, but in my severe high speed rough road use only the Bilsteins have held up. Oh yea, several years ago (20?) I ran a shock called Deusch Tec for Baja and abusive desert use, and it was fantastic, but expensive. Still have never had a Bilstein fail and one truck I sold has a set on it with about 300,000 miles on them (last 200,000 towing horse trailers, much easier use than I put it to).
I used them on my Ford Expedition for a few years and the adjustability set to firm made a huge difference in towing, but that was probably because of the mushy 1/2 ton suspension. I would have bought them for my GMC but everybody was recommending Bilstein so I went that way. I do miss the adjustablity and would be interested to hear if it worked the other way and softened the ride for the 3/4 ton.
A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more!