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GMC
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1993
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Pickup K2500, 2D Pickup, 6.5 F, Automatic
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Repair and Diagnosis
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Engine Performance
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Engine Controls - Adjustments
Engine Controls - Adjustments
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Engine Mechanical
Valve Clearance
Ignition Timing (Gasoline)
4-Cylinder Ignition Timing
2.5L (VIN A)
V6 Ignition Timing
Except 3.8L - VIN L
V8 Ignition Timing
Injection Pump Timing (Diesel)
6.2L & 6.5L
Idle Speed & Mixture
Idle Speed & Mixture (Gasoline)
Notes
Controlled Idle Speed Check
Minimum Idle Speed Adjustment (7.4L)
Idle Speed (Diesel)
Curb Idle
Fast Idle
Throttle Position (TP) Sensor
Notes
6.2L Diesel Light Duty (VIN C)
6.2L Diesel Heavy Duty (VIN J)
6.5L Turbo Diesel
WASTEGATE Actuator Adjustment (Turbo)
Notes
4.3L PFI (VIN Z)