The pump is located in the rear passenger side of the car. Get on the ground and look up behind the rear tire. Check the rubber bushings that the pump is mounted on. Also check the bolts on the pump and the shield.
1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2