GM Service Manual Online
For 1990-2009 cars only

Range

Line Pressure @ 600 RPM

Line Pressure @ 2100 RPM

Forward Converter - Torque Converter Clutch Not Applied

700-1 380 kPa (101-200 PSI)

1 515-1 795 kPa (220-260 PSI)

Forward Lockup - Torque Converter Clutch Applied

N/A

1 000-1 170 kPa (145-170 PSI)

Reverse

700-1 380 kPa (101-200 PSI)

1 515-1 795 kPa (220-260 PSI)

Neutral/Park

590-720 kPa (85-105 PSI)

1 515-1 795 kPa (220-260 PSI)