Idle Speed

CURB IDLE SPEED
Light Duty
Manual 700 rpm
Automatic 550 rpm (High Altitude 600)
Heavy Duty
Manual 600 rpm
Automatic 700 rpm

A/C ON IDLE SPEED
Manual 800 rpm
Automatic 650 rpm

FAST IDLE SPEED
Light Duty
Manual 1300 rpm
Automatic
Federal 1600 rpm
California 1800 rpm
High Altitude 1400 rpm

Heavy Duty
Federal 1900 rpm
California 1600 rpm

NOTE: All fast idle speeds are measured with the fast idle cam on the high step.