Transfer Case for 1991 GMC P3500

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There are 8 choices for the 1991 GMC P3500 Transfer Case !!!
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model VIN K (5th digit) dual rear wheels 131.5" wheelbase
model VIN K (5th digit) dual rear wheels 135.5" wheelbase 10000 gross vehicle weight
model VIN K (5th digit) dual rear wheels 135.5" wheelbase 12000 gross vehicle weight
model VIN K (5th digit) dual rear wheels 155.5" wheelbase (Extended Cab)
model VIN K (5th digit) dual rear wheels 159.5" wheelbase 10000 gross vehicle weight
model VIN K (5th digit) dual rear wheels 159.5" wheelbase 12000 gross vehicle weight
model VIN K (5th digit) single rear wheels
model VIN V (5th digit)