C 3500 Truck 2WD V6-262 4.3L (1990)
Idle Speed: Specifications
Minimum Idle Air Rate
Minimum Idle Air Rate
Engine Speed
Note: If the engine has less than 500 miles or is checked
at altitudes above 1500 feet, the idle rpm with a seated
IAC valve should be lower than the values above. Let
engine idle until proper fuel control status is closed
loop.
Manual Transmission
Neutral
400 - 525 rpm
Auto Transmission
Drive
400 +/- 50 rpm