GM Service Manual Online
For 1990-2009 cars only

Pump Type

Engine RPO

Brakes RPO

Engine RPM

Flow lpm (gpm)

Relief Valve Settings kPa (PSI)

Hobourn S600

LG5

JE3 or JE4

750

16 (4.16)

17 000 (2,465)

Isuzu

LG4

JE3 or JE4

750

14.2 (3.7)

17 000 (2,465)

All pressures are with engine at normal operating temperature.