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

700-1380 kPa (101-200 PSI)

1515-1795 kPa (220-260 PSI)

Forward Lockup - Torque Converter Clutch Applied

N/A

1000-1170 kPa (145-170 PSI)

Reverse

700-1380 kPa (101-200 PSI)

1515-1795 kPa (220-260 PSI)

Neutral/Park

800-1655 kPa (130-240 PSI)

1515-1795 kPa (220-260 PSI)