Operation CHARM
: Car repair manuals for everyone.
Home
>>
GMC Truck
>>
1989
>>
G 3500 1 Ton Van V8-454 7.4L
>>
Repair and Diagnosis
>>
Engine, Cooling and Exhaust
>>
Engine
>>
Testing and Inspection
>>
Instrument Panel Oil Warning Lamp "ON" at Idle
Instrument Panel Oil Warning Lamp "ON" at Idle
^
Oil cooler, or cooler line restricted. Remove restrictions in cooler or cooler line.
^
Oil pump pressure low.