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GMC Truck
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1987
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G 3500 1 Ton Van V8-305 5.0L
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Repair and Diagnosis
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Downshift Relay
Downshift Relay
Top of V8-305/5.0/5.7L:
LH Rear Of Engine Compartment
Applicable to: 0L & V8-350/5.7L engine. 1987 G series