Operation CHARM
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GMC Truck
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1998
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K 1500 Suburban 4WD V8-5.7L VIN R
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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 241, 243 and Borg-Warner 4401, 4470
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Encoder Signal Check
Encoder Signal Check
The TCCM checks the encoder signal in order to verify that the
transfer case
is in either 2HI, 4HI, or 4LO.