I just thought I would let novices like myself know, that after reading every thread and article about my Envoy air shocks. I tried the little 5/32 Tee Union, it worked well for a week, then failed nightly. I finally went to my local NAPA told them my problem, the salesman recommended a pair of springs for $84. He printed me a picture and a spec sheet for these springs. I went home and did more research, I counted the loops and compared them to everyone on the net selling them(including strutmasters). The closest price was $164.
I finally decided to give NAPA a shot. I also purchased load leveling shocks for $128 a pair. I installed them both today, it took me two hours, start to finish. The Envoy sits a little high for my taste (salesman warned me it would). I drove it tonight for 10 miles, and it feels great.
If anyone has any questions about part numbers here is my email. [email protected]