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2004
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Sierra 3500 2WD V8-8.1L VIN G
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Repair and Diagnosis
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Transmission and Drivetrain
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Automatic Transmission/Transaxle
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Service and Repair
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Overhaul
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4L80-E/4L85-E Automatic Transmission
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Repair Instructions
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70. Transmission Oil Pump Disassemble
70. Transmission Oil Pump Disassemble
1.
Remove the transmission oil pump cover bolts (220).
2.
Remove the vent passage splash shield (239).
3.
Separate the oil pump body (203) and the oil pump cover (206).