K 2500 Truck 4WD V8-379 6.2L DSL (1988)
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Disconnect negative battery cable.
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Unclip and remove shift lever boot from console.
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Remove shift lever assembly from transmission.
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Remove console.
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Lift and support vehicle.
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Remove transfer case skid plate if equipped.
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Drain lubricant from transfer case and transmission.
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Disconnect transfer case shift control linkage.
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Disconnect wiring harness and vent hose from transfer case.
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Disconnect front propshaft at transfer case flange.
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Reference mark the relationship of the propshaft at the flange.
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Remove rear propshaft.
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Remove transfer case to transmission adapter bolts.
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Remove transfer case.
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Disconnect wiring harness from transmission.
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Remove transmission mount to crossmember nuts.
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Support and raise transmission with an appropriate jack.
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Remove crossmember.
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Remove transmission to clutch housing bolts.
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Remove transmission and place on a bench.
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Before removing cover assembly from transmission ensure that all forward gears are in neutral and reverse is halfway engaged.
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Remove and discard transmission cover. Clean case of all gasket material.