Powertrain Management: Technical Service Bulletins

• Recalls
  • Recall 93E019000: Fuel Filter Defect
  • Recall 82V060000: Incorrect Accelerator Cable Linkages
• Customer Interest
  • Electrical - MIL ON/DTC's Set By Various Control Modules
  • Electrical - Intermittent MIL/DTC P2138/Reduced Power
  • ECM - Driveability Concerns/Erratic Warning Lamps
    • Overview
    • Conditon and Cause
    • Correction:
      • A.Loss of Power or Ground to the ECM
      • B.Large Voltage Variations On Vehicle Power and Ground Wires
      • C.Large Voltage Variations On ECM Connected Signal Wires
  • Engine - Shudder and Loss of Power
  • A/T - High Idle/Intermittent Code 26, Improper TPS
  • DFI/Engine - Hard Starting or Poor Performance
  • Engine - Rough Idle/Lack of Power/Miss/Backfire
  • Engine Idle Surge, DTC 30 (Idle Speed Control) Set
  • Fuel - Hard Start After Injector R&R, Application Chart
  • Fuel - Intermittent Reduction of Power/Stall
  • Starting - Dead Battery/No Crank After Overnight Set
  • O2 Sensor - DFI Codes 13 and 45
  • Instruments - Telltale Lights/Digital Displays Erratic
  • Engine - No Start/Hard Start/Poor Performance
  • Distributor Coil - Intermittent Code 51 or 52
  • Emissions - Driveablity, Restricted Exhaust/Plugged Cat
  • Air Injection Reaction Pipe Corrosion
    • Overview
    • Check Valve to Left Exhaust Manifold A.I.R. Pipe
    • Check Valve to Right Exhaust Manifold A.I.R. Pipe
    • Upper Catalytic Converter A.I.R. Pipe (C/D Series)
    • Lower Catalytic Converter A.I.R. Pipe (C/D Series)
  • Engine - Miss, Hesitation, or Roughness
  • Engine - Power Loss, Hesitation, Shudder/Backfire
  • Engine Controls - Poor Performance in Diagnostic Mode
  • Ignition - Miss, Stumble, Hesitation, Code 53, E53, E053
  • Erratic Idle Speed Fluctuations, DTC 30 (ISC Circuit)
  • Instruments - Oil Pressure Connector Repair Kit
  • Fuels - Effect of Volatility On Driveability Conditions
  • Engine, A/T - Shift/Driveability Concerns/MIL ON
• By Symptom
  • Abnormal wear/deterioration
    • Electrical - MIL ON/DTC's Set By Various Control Modules
    • Electrical - Intermittent MIL/DTC P2138/Reduced Power
    • Engine - Rough Idle/Lack of Power/Miss/Backfire
    • Engine Idle Surge, DTC 30 (Idle Speed Control) Set
    • ECM - Tap Test Precautions
    • Engine - HT4100 Revised Distributor Drive Gear
    • Air Injection Reaction Pipe Corrosion
      • Overview
      • Check Valve to Left Exhaust Manifold A.I.R. Pipe
      • Check Valve to Right Exhaust Manifold A.I.R. Pipe
      • Upper Catalytic Converter A.I.R. Pipe (C/D Series)
      • Lower Catalytic Converter A.I.R. Pipe (C/D Series)
  • Customer Interest
    • Electrical - MIL ON/DTC's Set By Various Control Modules
    • Electrical - Intermittent MIL/DTC P2138/Reduced Power
    • ECM - Driveability Concerns/Erratic Warning Lamps
      • Overview
      • Conditon and Cause
      • Correction:
        • A.Loss of Power or Ground to the ECM
        • B.Large Voltage Variations On Vehicle Power and Ground Wires
        • C.Large Voltage Variations On ECM Connected Signal Wires
    • Engine - Shudder and Loss of Power
    • A/T - High Idle/Intermittent Code 26, Improper TPS
    • DFI/Engine - Hard Starting or Poor Performance
    • Engine - Rough Idle/Lack of Power/Miss/Backfire
    • Engine Idle Surge, DTC 30 (Idle Speed Control) Set
    • Fuel - Hard Start After Injector R&R, Application Chart
    • Fuel - Intermittent Reduction of Power/Stall
    • Starting - Dead Battery/No Crank After Overnight Set
    • O2 Sensor - DFI Codes 13 and 45
    • Instruments - Telltale Lights/Digital Displays Erratic
    • Engine - No Start/Hard Start/Poor Performance
    • Distributor Coil - Intermittent Code 51 or 52
    • Emissions - Driveablity, Restricted Exhaust/Plugged Cat
    • Air Injection Reaction Pipe Corrosion
      • Overview
      • Check Valve to Left Exhaust Manifold A.I.R. Pipe
      • Check Valve to Right Exhaust Manifold A.I.R. Pipe
      • Upper Catalytic Converter A.I.R. Pipe (C/D Series)
      • Lower Catalytic Converter A.I.R. Pipe (C/D Series)
    • Engine - Miss, Hesitation, or Roughness
    • Engine - Power Loss, Hesitation, Shudder/Backfire
    • Engine Controls - Poor Performance in Diagnostic Mode
    • Ignition - Miss, Stumble, Hesitation, Code 53, E53, E053
    • Erratic Idle Speed Fluctuations, DTC 30 (ISC Circuit)
    • Instruments - Oil Pressure Connector Repair Kit
    • Fuels - Effect of Volatility On Driveability Conditions
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • Driveability
    • Engine - Shudder and Loss of Power
    • Engine - Detonation (Pinging), Slight Tip-in Hesitation
    • A/T - High Idle/Intermittent Code 26, Improper TPS
    • Engine - Rough Idle/Lack of Power/Miss/Backfire
    • Engine Idle Surge, DTC 30 (Idle Speed Control) Set
    • Fuel - Intermittent Reduction of Power/Stall
    • Distributor Coil - Intermittent Code 51 or 52
    • Engine - Poor Driveability
    • Emissions - Driveablity, Restricted Exhaust/Plugged Cat
    • Engine - Miss, Hesitation, or Roughness
    • Engine Controls - Poor Performance in Diagnostic Mode
    • Ignition - Miss, Stumble, Hesitation, Code 53, E53, E053
    • Warranty - Driveability Problems From Add On Equipment
    • Fuels - Effect of Volatility On Driveability Conditions
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
    • Fuel System - TOP TIER Detergent Gasoline
  • Erratic Operation
    • DFI/Engine - Hard Starting or Poor Performance
    • Fuel - Intermittent Reduction of Power/Stall
    • Engine - Miss, Hesitation, or Roughness
    • Engine - Power Loss, Hesitation, Shudder/Backfire
    • Open Circuit - Intermittent Rich Operation, DTC 15 Or 38
    • Erratic Idle Speed Fluctuations, DTC 30 (ISC Circuit)
  • Erratic Shifting
    • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • False instrument warning light/gauges
    • A/T - High Idle/Intermittent Code 26, Improper TPS
  • High emissions
    • I/M 240 Repairs - Obtaining Technical Assistance
  • Inoperative
    • Emissions - Driveablity, Restricted Exhaust/Plugged Cat
  • Loose
    • ECM - False Intermittent or Hard Code 25
    • Distributor Coil - Intermittent Code 51 or 52
  • Low, Dead battery
    • Starting - Dead Battery/No Crank After Overnight Set
  • Noise
    • Engine - Detonation (Pinging), Slight Tip-in Hesitation
    • Engine - Rough Idle/Lack of Power/Miss/Backfire
    • Engine - Detonation at Light Throttle
  • Out of specification
    • A/T - High Idle/Intermittent Code 26, Improper TPS
  • Poor performance
    • Engine - Shudder and Loss of Power
    • Fuels - Effect of Volatility On Driveability Conditions
    • Fuel System - TOP TIER Detergent Gasoline
  • Recalls
    • Recall 93E019000: Fuel Filter Defect
    • Recall 82V060000: Incorrect Accelerator Cable Linkages
  • Shorted/Open circuit
    • Ignition System - Alternate On-Car HEI Module Test
  • Starting problems
    • Fuel - Hard Start After Injector R&R, Application Chart
    • Starting - Dead Battery/No Crank After Overnight Set
    • Engine - No Start/Hard Start/Poor Performance
    • Fuels - Effect of Volatility On Driveability Conditions
    • Fuel System - TOP TIER Detergent Gasoline
  • Weak Spark
    • Engine - No Start/Hard Start/Poor Performance
• All Technical Service Bulletins
  • Vehicle - Engine And Sub Systems Flushing Info. (CANADA)
  • Vehicle - Engine And Sub-Systems Flushing Recommendations
  • Engine - THIS BULLETIN HAS BEEN CANCELED
  • Fuel System - Fuel Injector Maintenance Cleaning
  • Fuel System - GM Fuel System Treatment PLUS(R) Info.
  • Electrical - MIL ON/DTC's Set By Various Control Modules
  • Electrical - Intermittent MIL/DTC P2138/Reduced Power
  • Electrical - Wire Probing Device
  • I/M 240 Repairs - Obtaining Technical Assistance
  • Engine/Fuel - Fuel Injector and Choke Light Service
  • ECM - Driveability Concerns/Erratic Warning Lamps
    • Overview
    • Conditon and Cause
    • Correction:
      • A.Loss of Power or Ground to the ECM
      • B.Large Voltage Variations On Vehicle Power and Ground Wires
      • C.Large Voltage Variations On ECM Connected Signal Wires
  • Engine - Shudder and Loss of Power
  • Engine - Effects of Top Engine Cleaner On CAT Converter
  • Engine - Detonation (Pinging), Slight Tip-in Hesitation
  • A/T - High Idle/Intermittent Code 26, Improper TPS
  • ISC/TPS - System Operation
  • Recall 93E019000: Fuel Filter Defect
  • DFI/Engine - Hard Starting or Poor Performance
  • Spark Plug - New Design
  • Engine - Rough Idle/Lack of Power/Miss/Backfire
  • Engine Idle Surge, DTC 30 (Idle Speed Control) Set
  • Fuel - Hard Start After Injector R&R, Application Chart
  • Fuel - Intermittent Reduction of Power/Stall
  • Tools - Introduction Of The Fuel Injector Tester
  • ECM - Tap Test Precautions
  • Starting - Dead Battery/No Crank After Overnight Set
  • ECM - False Intermittent or Hard Code 25
  • O2 Sensor - Check Engine Light Flickering
  • Oxygen Sensors - Silica Contamination
  • O2 Sensor - DFI Codes 13 and 45
  • Ignition System - Alternate On-Car HEI Module Test
  • Engine - HT4100 Revised Distributor Drive Gear
  • Instruments - Telltale Lights/Digital Displays Erratic
  • Engine - No Start/Hard Start/Poor Performance
  • Distributor Coil - Intermittent Code 51 or 52
  • PROM - Update Availability
  • Information On PROM Calibrations
  • PROM - Calibrations Listings
    • Overview
    • 1980 Thru 84 6.0L V-8
    • 1981 - 84 6.0L V-8-6-4
    • 1981 4.1L V-6
    • 1982 4.1L V-8
    • 1982 4.1L V-6
    • 1982 1.8L L-4
    • 1983 4.1L V-8
    • 1983 2.0L L-4
    • 1984 4.1L V-8
    • 1984 2.0L L-4
    • 1985 4.1L V-8
    • 1985 2.0L L-4
    • 1986 4.1L V-8
    • 1986 5.0L V-8
    • 1986 2.0L L-4
    • 1987 4.1L V-8
    • 1987 5.0L V-8
    • 1987 4.1L V-8
    • 1987 2.8L V-6
    • 1988 4.5L, 4.1L V-8
    • 1988 5.0L V-8
    • 1988 2.8L V-6
    • 1989 4.5L, 5.0L V-8
  • Threadlocking Compound - Packaging Change
  • Fuel - Throttle Body Mounting Bolt Torque
  • Recall 82V060000: Incorrect Accelerator Cable Linkages
  • Engine - Detonation at Light Throttle
  • Engine - Poor Driveability
  • Emissions - Replacement Procedure for Dual Bed Cat
  • Emissions - Driveablity, Restricted Exhaust/Plugged Cat
  • Air Injection Reaction Pipe Corrosion
    • Overview
    • Check Valve to Left Exhaust Manifold A.I.R. Pipe
    • Check Valve to Right Exhaust Manifold A.I.R. Pipe
    • Upper Catalytic Converter A.I.R. Pipe (C/D Series)
    • Lower Catalytic Converter A.I.R. Pipe (C/D Series)
  • Engine - Miss, Hesitation, or Roughness
  • Engine - Power Loss, Hesitation, Shudder/Backfire
  • HEI System - Description and Diagnosis Chart
  • Emissions - Testing Information
  • Enhanced IM240 Program - Implementation Plan
  • Emission - Enhanced Inspection Maintenance Programs
  • I/M 240 Program - Equipment Purchase
  • I/M Emissions Diagnostic Manual -Program
  • Enhanced Emission I/M - Program Update
  • Enhanced Emission Inspection Maintenance - Equipment
  • Open Circuit - Intermittent Rich Operation, DTC 15 Or 38
  • Engine Controls - Poor Performance in Diagnostic Mode
  • Ignition - Miss, Stumble, Hesitation, Code 53, E53, E053
  • TCC - Code 39 Diagnostic Information
    • Overview
    • I.Torque Converter Clutch Controls
    • II. TCC Enable Conditions
    • III. TCC Operation
    • IV. Code 39 Test Conditions
    • V.TCC Diagnosis
  • Oxygen Sensor Test - Revised Tech 1 Mass Storage CD
  • Erratic Idle Speed Fluctuations, DTC 30 (ISC Circuit)
  • Warranty - Driveability Problems From Add On Equipment
  • Accelerator Pumps - Available for Quadrajet Carburetors
  • Secondary Ignition Wire - Service Precautions
  • PROM/MEMCAL - Identification Marks
  • Instruments - Oil Pressure Connector Repair Kit
  • Fuels - Effect of Volatility On Driveability Conditions
  • Engine/Fuel System Controls - Miscellaneous Items
  • Fuel - How Fuel Economy Is Determined
  • Carburetor Mixture Control Solenoid - Revised Adjustment
  • Fuel - Reformulated/Oxygenated Gasolines
  • Engine, A/T - Shift/Driveability Concerns/MIL ON
  • Fuel System - E85 Fuel Usage Precaution
  • Engine/Fuel System - Oil/Fuel Additive Information
  • Fuel System - TOP TIER Detergent Gasoline (Canada)
  • Fuel System - TOP TIER Detergent Gasoline