C 3500 Truck 2WD V6-262 4.3L (1990)
CONTROLLED IDLE SPEED
Transmission
Gear
Idle Speed
IAC Counts [1]
OPEN/CLOSED Loop [2]
Man.
N
550
2-20
CL
Auto
D
537
10-25
CL
[1] Add 2 counts for engines with less than 500 miles. Add 2 counts for every 1000 ft. above sea level.
[2] Let engine idle until proper fuel control status is reached (OPEN/CLOSED loop).
MINIMUM IDLE AIR RATE
Transmission
Gear
Engine Speed
OPEN/CLOSED Loop [1]
Man.
N
400-525
CL
Auto.
D
400 +/- 50
CL
OVER 8500 GVW
CONTROLLED IDLE SPEED
Transmission
Gear
Idle Speed
IAC Counts [1]
OPEN/CLOSED Loop [2]
Man.
N
650
12-30
CL
Auto
D
650
20-35
CL
[1] Add 2 counts for engines with less than 500 miles. Add 2 counts for every 1000 ft. above sea level.
[2] Let engine idle until proper fuel control status is reached (OPEN/CLOSED loop).
MINIMUM IDLE AIR RATE
Transmission
Gear
Engine Speed
OPEN/CLOSED Loop [1]
Man.
N
400-525
CL
Auto.
D
400 +/- 50
CL
