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Vacuum pump for brake booster, as Killboy stated. I need to replace it on our Equinox with basically the same 3.6L, LFX. The 3.6L must produce poor vacuum. After setting for awhile, cold start, the brake pedal basically will go to the floor. When you turn the key to run, you should hear the pump run and then stop, creating a vacuum. There is a vacuum sensor to determine when to run. Without the pump, it takes a small amount of time to have the brakes function properly.
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GPI SS3 Cam & stuff,N.O. Plate(dedicated fuel tank,progressive,fuel hose upgrade,remote opener,heater,console switches),LNC2000,CTAP,ARH 1 7/8" LTs/gutted cats/X pipe/mufflers,Jet Hot coated LTs,GPI HPT Tune,CAI, Scoop,Rx Catch Can,Gates heater hose relocation, Remote clutch & auto brake res,Metco loop,Momentum Tunnel Brace,TSW Nurb 18",555 & 05,Pfadt trailing arms & toe rods,Autometer WB,Fesler Pillar Pod,LED strips (int),Lloyds floor & trunk mats,LED DRL/front turn & license plate,DRL harness,VLEDs tail lights,Plasticoat Bowties. Ord: Oct 5, 2009 Rec: Nov 19, 2009 13.17@112.6 stock
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