I have the stock leveling package and I think they are leaking,I have seen the gm replacement delco shocks,they are huge compaired to what I have,the gabrial l kit is 79 bucks the delco'* 179..what to do..with the weak ones do you think it would make my car shake under my seat...tires are all good and balanced. al

I picked up air shocks from O'Reilleys over several USA trips. I think I paid $80 per pair.

I can't remember the make but they have been working fine in an '83 Riviera, '79 Dodge Mirada, '78 Camaro and a few other cars too.
Never had a problem with any of them, I fitted the first set over 5 years ago.

Roger.

did you have to change the fittings on them? mine have quick disconnects...new ones have threads

if its the same as mine theres a clip and tube beside the thread youll see when you take it off its not hard. i have the gabreils, they were stiff at first but after a couple weeks they worked in and now feel like the car did original. ii wouldnt give you a nickel for delco these days its all cheap chinese. at least you get a deal on the companies that are upfront about it, not charge double because of the name

the reason i want to change them is because the car has a shaking in my seat more so towards the back,wondered if thats the prob..

Vibrations aren't usually shocks. Alot of people have issues with there engine mounts on those cars

coming from the rear of the car?

vibrations are hard to tell where they come from. if you had the tires balanced, second likely is bearings most other things make noise or weird tire wear more than vibrations. most time you hear someone say vibrations its the motor mount or the exhaust hitting the heat shields something like that. both are free to check, just have someone shift the engine from reverse to drive and back while you watch the engine for excessive rock. you can also grab the exhaust and rock it back and forth and make sure its not touching anything.

Jack up the car and spin the wheels, sounds typical of a tire going out of shape.

Bad shocks would give you poor handling, maybe a wallowy ride, you shouldn't get a shimmy from bad shocks though.

I'd get a second opinion from a decent mechanic before you start changing out parts you don't need to.

Roger.