Primary Fuel Filter And Water Separator - GMC T-Series 1999 Owner's Manual

Primary Fuel Filter and Water Separator

(If Equipped)
If you have a diesel engine, you may have this spin
filter. It is located behind the cab on the driver's side
behind the fender.
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on
It has a clear plastic drain
bowl at the bottom. Check
the drain bowl occasionally
for any water or particles.
To drain the bowl, shut off
the engine. Then partially
open the drain valve at the
bottom of the filter.
Secondary Fuel Filter and Water
Separator/Heater (If Equipped)
If you have a diesel engine, you may have this spin
filter and fuel separator/heater. It is mounted on the left
side of the engine.
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on
It has a metal drain bowl at
the bottom. Occasionally,
check the bowl for any
water or particles. To check
or drain the bowl, shut off
the engine. Then push up on
-
the spring loaded drain
valve until clear fuel is
flowing from the valve. The
particles or water will drain
out first.
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