gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

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K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)

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MACHINING

Since accurate control of the rotor tolerances is necessary for proper performance of the disc brakes, machining of the rotor should be done only
with precision equipment.

NOTE:  1 inch = 25.4mm, so if your micrometer measures in inches and the specified thickness on the disc is in millimeters, convert millimeters to
inches by dividing the specified number of millimeters by 25.4.

Example: Specification on disc is 17.8 mm. 
Dividing 17.8mm by 25.4mm/in = 17.8/25.4 = 0.70 inches.

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