Engine, Cooling and Exhaust: Technical Service Bulletins

• Customer Interest
  • Engine - Increased Noise
  • Engine - Noise, Updated Exhaust Manifolds
  • Cooling System - Leaks
  • Cooling System - Engine Overheat Under Heavy Usage
  • Intake Air Duct - Reduced Engine Performance
  • A/C - Reduced Heater Performance
  • Frame - Cracks at Engine Mount Brackets
  • PROM - Surge, Detonation or Code 32, EGR
  • Fuel - Diagnosis for Surge Hot/Cold, Detonation, Code 32
  • Engine - Rough/Surges/Misfires/Code 43
  • Engine - Surges
  • PROM Update - Engine Surge
  • Engine - Block Heater Leaks
  • Engine - Miss, Hesitation, or Roughness
  • Engine - Oil Cooler Line Leaks
    • Overview
    • Oil Cooler Line Applications Chart
    • C/K 1500/2500 4.3L & KC4 Internal Cooler
    • K1500/2500 5.0L & KC4 5.7L & KC4 Except GT5/HC4 Internal Cooler
    • C1500/2500 5.0L & KC4 5.7L & KC4 Except GT5/HC4/5A5/5A6 Internal Cooler
    • C2500/3500 5.7L & KC4 & 5A5/5A6 5.7L & KC4 & GT4/GT5 External Cooler
    • K2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
    • C2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
    • C/K 3500 7.4L & KC4 External Cooler
  • Engine - Oil Cooler Line Leaks (Replace Hose)
    • Overview
    • C/K 1500/2500 4.3L & KC4 Internal Cooler
    • K1500/2500 5.0L & KC4 5.7L & KC4 Except GT5/HC4 Internal Cooler
    • C1500/2500 5.0L, KC4 5.7L, KC4 Not GT5/HC4/5A5/5A6 Int. Cooler
    • C2500/3500 5.7L, KC4, 5A5/5A6 5.7L, KC4 & GT4/GT5 Ext. Cooler
    • K2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
    • C2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
    • C/K 3500 7.4L & KC4 External Cooler
  • Engine, A/T - Shift/Driveability Concerns/MIL ON
• By Symptom
  • Abnormal wear/deterioration
    • Engine - Increased Noise
    • Engine - Noise, Updated Exhaust Manifolds
    • Engine - Serpentine Belt W/ Worn Idler Pulley/Tensioner
    • Frame - Cracks at Engine Mount Brackets
    • Engine - Drive Belt Noise/Wear
  • Customer Interest
    • Engine - Increased Noise
    • Engine - Noise, Updated Exhaust Manifolds
    • Cooling System - Leaks
    • Cooling System - Engine Overheat Under Heavy Usage
    • Intake Air Duct - Reduced Engine Performance
    • A/C - Reduced Heater Performance
    • Frame - Cracks at Engine Mount Brackets
    • PROM - Surge, Detonation or Code 32, EGR
    • Fuel - Diagnosis for Surge Hot/Cold, Detonation, Code 32
    • Engine - Rough/Surges/Misfires/Code 43
    • Engine - Surges
    • PROM Update - Engine Surge
    • Engine - Block Heater Leaks
    • Engine - Miss, Hesitation, or Roughness
    • Engine - Oil Cooler Line Leaks
      • Overview
      • Oil Cooler Line Applications Chart
      • C/K 1500/2500 4.3L & KC4 Internal Cooler
      • K1500/2500 5.0L & KC4 5.7L & KC4 Except GT5/HC4 Internal Cooler
      • C1500/2500 5.0L & KC4 5.7L & KC4 Except GT5/HC4/5A5/5A6 Internal Cooler
      • C2500/3500 5.7L & KC4 & 5A5/5A6 5.7L & KC4 & GT4/GT5 External Cooler
      • K2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
      • C2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
      • C/K 3500 7.4L & KC4 External Cooler
    • Engine - Oil Cooler Line Leaks (Replace Hose)
      • Overview
      • C/K 1500/2500 4.3L & KC4 Internal Cooler
      • K1500/2500 5.0L & KC4 5.7L & KC4 Except GT5/HC4 Internal Cooler
      • C1500/2500 5.0L, KC4 5.7L, KC4 Not GT5/HC4/5A5/5A6 Int. Cooler
      • C2500/3500 5.7L, KC4, 5A5/5A6 5.7L, KC4 & GT4/GT5 Ext. Cooler
      • K2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
      • C2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
      • C/K 3500 7.4L & KC4 External Cooler
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • Driveability
    • Intake Air Duct - Reduced Engine Performance
    • PROM - Surge, Detonation or Code 32, EGR
    • Fuel - Diagnosis for Surge Hot/Cold, Detonation, Code 32
    • Engine - Rough/Surges/Misfires/Code 43
    • Engine - Surges
    • Engine - Miss, Hesitation, or Roughness
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • Erratic Operation
    • Engine - Miss, Hesitation, or Roughness
  • Erratic Shifting
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • False instrument warning light/gauges
    • PROM - Surge, Detonation or Code 32, EGR
    • Fuel - Diagnosis for Surge Hot/Cold, Detonation, Code 32
  • Leaks
    • Engine - Noise, Updated Exhaust Manifolds
    • Cooling System - Leaks
    • A/C - Apparent Leaks At the Heater Core
    • Engine - Block Heater Leaks
    • Engine - Oil Cooler Line Leaks
      • Overview
      • Oil Cooler Line Applications Chart
      • C/K 1500/2500 4.3L & KC4 Internal Cooler
      • K1500/2500 5.0L & KC4 5.7L & KC4 Except GT5/HC4 Internal Cooler
      • C1500/2500 5.0L & KC4 5.7L & KC4 Except GT5/HC4/5A5/5A6 Internal Cooler
      • C2500/3500 5.7L & KC4 & 5A5/5A6 5.7L & KC4 & GT4/GT5 External Cooler
      • K2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
      • C2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
      • C/K 3500 7.4L & KC4 External Cooler
    • Engine - Oil Cooler Line Leaks (Replace Hose)
      • Overview
      • C/K 1500/2500 4.3L & KC4 Internal Cooler
      • K1500/2500 5.0L & KC4 5.7L & KC4 Except GT5/HC4 Internal Cooler
      • C1500/2500 5.0L, KC4 5.7L, KC4 Not GT5/HC4/5A5/5A6 Int. Cooler
      • C2500/3500 5.7L, KC4, 5A5/5A6 5.7L, KC4 & GT4/GT5 Ext. Cooler
      • K2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
      • C2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
      • C/K 3500 7.4L & KC4 External Cooler
  • Loose
    • Engine - Serpentine Belt W/ Worn Idler Pulley/Tensioner
    • Engine - Generator Belt Tension
  • Noise
    • Engine - Increased Noise
    • Engine - Noise, Updated Exhaust Manifolds
    • Engine - Serpentine Belt W/ Worn Idler Pulley/Tensioner
    • PROM - Surge, Detonation or Code 32, EGR
    • Fuel - Diagnosis for Surge Hot/Cold, Detonation, Code 32
    • Oil Filters - Enhanced Anti-Drainback Valves
    • Engine - Drive Belt Noise/Wear
  • Overheating
    • Engine Overheat - Snowplows Vs Air Flow
    • Cooling System - Engine Overheat Under Heavy Usage
  • Poor performance
    • A/C - Reduced Heater Performance
• All Technical Service Bulletins
  • Vehicle - Engine And Sub Systems Flushing Info. (CANADA)
  • Vehicle - Engine And Sub-Systems Flushing Recommendations
  • Engine - Increased Noise
  • Engine - 4 Bolt Main Application
  • Engine - Noise, Updated Exhaust Manifolds
  • Engines - ACDelco Remanufactured
    • Overview
    • Warranty Coverage
    • Warranty Claim Submission Procedures
  • Engine - Surface Conditioning Discs Precautions
  • Engine - AC Delco Remanufactured Engines
    • Overview
    • Warranty Coverage
    • New Warranty Registration
    • Warranty Claim Submission Requirements
    • Claim Submission Details
  • Cooling System - Factory Use of Stop Leak
  • Engine Coolant - Testing Information
  • Cooling System - Leaks
  • Engine Overheat - Snowplows Vs Air Flow
  • Engine - Overheat Diagnosis
    • Overview
    • Water Pump By-Pass
    • Electric Fan Information
    • Radiator Information
    • A/C, Thermostat, Hose, & Coolant Information
    • Belts, Water Pump, & Fan Shroud Information
    • Support, Baffles, & Deflectors Information
  • Cooling System - Engine Overheat Under Heavy Usage
  • Intake Air Duct - Reduced Engine Performance
  • A/C - Reduced Heater Performance
  • A/C - Apparent Leaks At the Heater Core
  • A/T - Intermittent Downshift/Slip/Cycling Diagnosis
  • Cooling - Radiator Repair/Replacement Guidelines
  • Engine - Serpentine Belt W/ Worn Idler Pulley/Tensioner
  • Frame - Cracks at Engine Mount Brackets
  • PROM - Surge, Detonation or Code 32, EGR
  • Fuel - Diagnosis for Surge Hot/Cold, Detonation, Code 32
  • Engine - Generator Belt Tension
  • Engine - Rough/Surges/Misfires/Code 43
  • Engine - Surges
  • PROM Update - Engine Surge
  • Oil Filters - Enhanced Anti-Drainback Valves
  • Engine - Block Heater Leaks
  • Engine - Miss, Hesitation, or Roughness
  • Cooling - New Style Hose Clamp
  • Cooling System - Antifreeze Recycling
  • Coolant - Recycling Update
  • Coolant - Information on Propylene Glycol Usage
  • Warranty - Recycled Engine Coolant Policy
  • Coolant - Usage/Specifications
  • Engine Coolant - Recycling
  • Engine - Drive Belt Noise/Wear
  • Engine - Oil Cooler Line Leaks
    • Overview
    • Oil Cooler Line Applications Chart
    • C/K 1500/2500 4.3L & KC4 Internal Cooler
    • K1500/2500 5.0L & KC4 5.7L & KC4 Except GT5/HC4 Internal Cooler
    • C1500/2500 5.0L & KC4 5.7L & KC4 Except GT5/HC4/5A5/5A6 Internal Cooler
    • C2500/3500 5.7L & KC4 & 5A5/5A6 5.7L & KC4 & GT4/GT5 External Cooler
    • K2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
    • C2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
    • C/K 3500 7.4L & KC4 External Cooler
  • Engine - Oil Cooler Line Leaks (Replace Hose)
    • Overview
    • C/K 1500/2500 4.3L & KC4 Internal Cooler
    • K1500/2500 5.0L & KC4 5.7L & KC4 Except GT5/HC4 Internal Cooler
    • C1500/2500 5.0L, KC4 5.7L, KC4 Not GT5/HC4/5A5/5A6 Int. Cooler
    • C2500/3500 5.7L, KC4, 5A5/5A6 5.7L, KC4 & GT4/GT5 Ext. Cooler
    • K2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
    • C2500/3500 7.4L & KC4 Except 5A5/5A6 Internal Cooler
    • C/K 3500 7.4L & KC4 External Cooler
  • Engine Controls - Idle Speed/Minumum Idle Air Rate Specs
  • Cooling System - Coolant Recycling Information
  • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • Engine - Sealant Usage/Procedures
  • Engine/Fuel System - Oil/Fuel Additive Information
  • Cooling System, A/C - Aluminum Heater Cores/Radiators
  • Engine - Noise/Damage Oil Filter Application Importance
  • Engine - Drive Belt Misalignment Diagnostics
  • Engine - Use of 'Surface Conditioning Disks'
  • Engine - Intake Manifold Inspection/Replacement
  • Engine - GM Dexos 1(R) And 2(R) Oil Specifications
  • Engine - GM dexos 1(R) and dexos 2(R) Oil Specifications/Info.