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GMC
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1989
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Forward Control 5.7 K, Standard
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Engine Performance
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Adjustment
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Tune-Up - Diesel
Tune-Up - Diesel
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Adjustments
Valve Arrangement
Valve Clearance
Glow Plugs
Injection Pump Timing
Hot (Slow) Idle Rpm
Cold (Fast) Idle Rpm
Vacuum Regulator Valve/Detent Switch Adjustment
6.2L Engine W/Heavy Duty Emissions & Automatic Transmission
Servicing
Emission Control
Specifications
Fuel System
Batteries
Service Intervals
Belt Adjustment
Capacities