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Chevrolet
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2005
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Silverado 1500 HD, 4WD
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Repair and Diagnosis
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Transmission
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Automatic Trans
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Automatic Transmission - 4L80-E/4L85-E - Service, Diagnosis & Trouble Shooting
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Troubleshooting
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Inadequate Lubrication
Inadequate Lubrication
Inadequate Lubrication
Checks
Cause
Pressure Regulator Valve (231)
Valve is stuck in a high demand position.
Pump Body (206)
Cross channel leakage
Gasket (6)
Damaged
Oil Transfer Hole Cup Plug
Plug is leaking