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GMC Truck
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1998
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S15/T15 Jimmy 4WD V6-4.3L VIN W
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Repair and Diagnosis
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Transmission and Drivetrain
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Transfer Case
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Description and Operation
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New Venture Gear 233-NP1 (2 Speed Selectable)
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Encoder Signal Check
Encoder Signal Check
The Transfer Case Control Module
(TCCM)
checks the encoder signal in order to verify that the transfer case is in either 2HI, 4HI, or 4LO.