Operation CHARM
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GMC Truck
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1989
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C 3500 Truck 2WD V8-379 6.2L DSL
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Repair and Diagnosis
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Transmission and Drivetrain
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Automatic Transmission/Transaxle
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Testing and Inspection
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Initial Inspection and Diagnostic Overview
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Road Test Procedure
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Upshifts
Upshifts
1. Place gear selector in Drive and accelerate, using a steadily increasing throttle pressure.
2. Note shift speed point gear engagements for second and third gear.