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GMC Truck
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1984
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S15/T15 2WD P/U L4-121 2.0L VIN Y 2-bbl
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Repair and Diagnosis
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Maintenance
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Tune-up and Engine Performance Checks
Tune-up and Engine Performance Checks
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Service Precautions
Vehicle Damage Warnings
Testing and Inspection
Initial Inspection and Diagnostic Overview
Initial Test Drive
Tune-Up, Initial Inspection
Symptom Related Diagnostic Procedures
Cranks, Won't Start
Carbureted
Engine Backfires
Carbureted
Engine Diesels, Runs After Shutoff
Engine Pings or Knocks
Without Knock Sensor
Engine Runs Rough, Misses
Carbureted
Engine Starts, Then Dies
Carbureted
Engine Stumbles or Hesitates on Acceleration
Carbureted
Vacuum Advance
Hard Starting, Excessive Cranking
Carbureted
Idle Speed Problems
Without Computer Controls
Poor Acceleration, Lack of Power
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Service and Repair
Procedures
Tune-up Service Steps
Tools and Equipment
Electrical / Mechanical Repair