2000 Silhouette. Got more gas than usual, noted when driving car was making a clunking noise in the rear when hitting slight bump. Got home looked at the car and the rear end looked like it was on a jack. Shocks were extended. Got under there, found a larger hose- 1/4" or so off up at the top. Pulled the tiny 1/8" hose off the shock-Whoooosh-air came out, car settled down. How does this system work? Larger hose seems to run up into the frame, has a ''tee'', and goes into the top of the round compressor(?) body. Manuals, no help!