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Sierra 1500 2WD V6-4.3L
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Allison - Automatic Transmission
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4. Transmission Vent Removal
4. Transmission Vent Removal
Transmission Vent Removal
1.
Gently pry the vent (2) from the transmission case.
2.
If the vent cap (1) comes off, gently pry the stem from the transmission case.