GMC Workshop Service and Repair Manuals

[2] Let engine idle until proper fuel control status is reached (OPEN/CLOSED LOOP).

[3] Suburban with a single catalytic converter.

MINIMUM IDLE AIR RATE

Transmission

Gear

Engine Speed

OPEN/CLOSED LOOP

Man.

N

550 +/- 25

CL

Auto.

D

450 +/- 25

CL