Sierra 1500 2WD V6-4.3L (2008)
Fluid Condition Inspection
Inspect the fluid color. The fluid should be red or dark brown.
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If the fluid color is very dark or black and has a burnt odor, inspect the fluid and inside of the bottom pan for excessive metal particles or other
debris. A small amount of "friction" material in the bottom pan is a "normal" condition. If large pieces and/or metal particles are noted in the fluid
or bottom pan, flush the oil cooler and cooler lines and overhaul the transmission. If there are no signs of transmission internal damage noted,
replace the fluid filter assembly, repair the oil cooler, and flush the cooler lines.
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Fluid that is cloudy or milky or appears to be contaminated with water indicates engine coolant or water contamination. Refer to Engine
Coolant/Water in Transmission (See: Testing and Inspection/Symptom Related Diagnostic Procedures/6L50/6L80/6L90 - Automatic
Transmission/Engine Coolant/Water in Transmission) .
