Vacuum Pump

WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2002 Saturn Vue, 2002 Pontiac Montana, 2002 Pontiac Aztek, 2002 Oldsmobile Silhouette, and 2002 Oldsmobile Bravada. However, it is still accessible from the selected car via links, so may be relevant.

Vacuum pump provides vacuum for operating emission control components (some "C", "G" and "K" series vehicles), cruise control and A/C-heater servos. The vacuum pump is driven by either a belt or gear.

The belt-driven vacuum pump is mounted on right front of engine. Except for the pulley, vacuum pump is replaced as an assembly.

The gear-driven pump is mounted on the top rear of engine and contains a permanently-mounted speed sensor. Pump is driven by a cam inside the drive assembly to which it mounts. On the lower end of the drive housing assembly is a drive gear which meshes with the camshaft gear in the engine. The drive gear causes the cam in the drive housing to rotate.

CAUTION: The gear-driven vacuum pump (if equipped) drives the engine oil pump. DO NOT run engine with gear-driven vacuum pump removed.