GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

DEFINITION: Inadequate Lube or Low Line Pressure

Calibration

Incorrect platform or level

Cooler Lines

Clogged or restricted

Lower Channel Plate

Warpage

PCS

Leaking

Pressure Reg. Valve

Stuck due to sediment

Primary Pump Body

Leakage at the gasket or pump body

Scavenge Pipe

Restriction

Scavenge Pipe Seal

Damaged, cut or leaking

Scavenge Pump Body

Leakage at the gasket or pump body

Scavenge Screens

Clogged

Secondary Pump Body

Leakage at the gasket or pump body

Transmission Fluid

Low level