2003 Pontiac Sunfire AutomaticFACTORY OEM SERVICE PROCEDURE

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's manual. Be very cautious using repair info from here because these pages may not apply to your vehicle. Different variant/trim Section 1 (Manual Transmission Clutches) Section 2 (Manual Transmission) Different car Section 1 (Steering Column Switches) Section 2 (Power Mirror System) Section 3 (Power Window System) Section 4 (Wiper System And Washer System) Section 5 (Anti-Theft System) Section 6 (Cruise Control System) Section 7 (Engine Control System Self-Diagnostics - 5.7L) Section 8 (Steering Column And Steering Column Switches) Section 9 (Analog Instrument Panels) Section 10 (Remote Keyless Entry Systems) Section 11 (Power Hatch And Fuel Door Release) Section 12 (Memory Systems) Section 13 (Power Seat System) Section 14 (Starting System) Section 15 (Power Door Lock System) Section 16 (Body Control Modules) Section 17 (Engine Performance - Wiring Diagrams) Section 18 (HVAC System - Manual) Section 19 (Anti-Lock Brake System With Traction Control System - DELPHI 7) Section 20 (Computer Relearn Procedures) Section 21 (Supplemental Inflatable Restraint Systems) Section 22 (Engine Controls Self-Diagnostics - 2.2L & 2.4L) Section 23 (Steering Column & Steering Column Switches) Section 24 (Body Control Modules) Section 25 (Cruise Control System) Section 26 (Theft Deterrent System) Section 27 (Analog Instrument Panels) Section 28 (Steering Wheel And Steering Column) Section 29 (Power Mirror System) Section 30 (Remote Keyless Entry System) Section 31 (Power Window System) Section 32 (Power Door Lock System) Section 33 (Engine Control System - Removal & Installation, Overhaul) Section 34 (Engine Control System Troubleshooting - No Codes) Section 35 (Charging System) Section 36 (Wiper System And Washer System) Section 37 (Starting System) Section 38 (Warning System - Wiring Diagrams) Section 39 (Illumination - Interior Lighting Systems Wiring Diagrams) Section 40 (Exterior Lighting Systems - Wiring Diagrams) Section 41 (HVAC Systems - Manual) Section 42 (Engine Control System - Basic Diagnostic Procedures) Section 43 (Wheel Drive Shafts) Section 44 (Drive Axles) Section 45 (Computer Relearn Procedures) Section 46 (Manual Transmission Clutches) Section 47 (Front Suspension System) Section 48 (Steering Wheel & Steering Column) Section 49 (Shift Interlock Systems) Section 50 (Power Rack & Pinion Steering System) Section 51 (System Wiring Diagrams) Section 52 (System Wiring Diagrams) Section 53 (Disc Brakes & Drum Brakes) Section 54 (Automatic Transmission Servicing) Section 55 (Electrical Component Locator) Section 56 (Starting System) Section 57 (Manual Transmission Servicing) Section 58 (Engine Controls Self-Diagnostics - 2.2L) Section 59 (Engine Controls Self-Diagnostics - 2.4L) Section 60 (Engine Controls Self-Diagnostics - 2.2L CNG) Section 61 (Engine Controls Self-Diagnostics - 5.7L Corvette) Section 62 (Engine Controls - Self-Diagnostics) Section 63 (Computer Relearn Procedures) Section 64 (Engine Control System - Basic Diagnostic Procedures) Section 65 (Supplemental Inflatable Restraint System) Section 66 (Engine Control System Troubleshooting - No Codes) Section 67 (Engine Controls Removal & Installation) Section 68 (Supplemental Inflatable Restraint System) Section 69 (Supplemental Inflatable Restraint System) Section 70 (System Wiring Diagrams) Section 71 (System Wiring Diagrams) Section 72 (Automatic Transmission Servicing) Section 73 (Engine Controls - Service & Adjustment Specifications) Section 74 (Engine Controls - Service & Adjustment Specifications) Section 75 (Engine Controls - Service & Adjustment Specifications) Section 76 (Engine Control System - Service & Adjustment Specifications) Section 77 (Automatic Transaxle Servicing) Section 78 (Engine Control System - Theory & Operation) Section 79 (Engine Control System - Basic Diagnostic Procedures) Section 80 (Engine Control System - Self-Diagnostics) Section 81 (Engine Control System - System & Component Testing) Section 82 (Engine Control System - Trouble Shooting - No Codes) Section 83 (Engine Control System - Removal & Installation) Section 84 (Charging System) Section 85 (Electrical Component Locator) Section 86 (System Wiring Diagrams) Section 87 (System Wiring Diagrams) Section 88 (System Wiring Diagrams) Section 89 (System Wiring Diagrams) Section 90 (System Wiring Diagrams) Section 91 (System Wiring Diagrams) Section 92 (System Wiring Diagrams) Section 93 (Engine Controls Self-Diagnostics - 2.2L Bi-Fuel) Section 94 (ENGINE CONTROLS - TROUBLE SHOOTING - NO CODES - 2.2L Bi-Fuel) Section 95 (Engine Controls - Removal & Installation, Overhaul) Section 96 (Engine Controls - Removal & Installation) Section 97 (Wheel Alignment Specifications) Section 98 (Engine Controls Self-Diagnostics) Section 99 (Engine Control System - PID Values, Pcm Connector Views & Terminal Identification) Section 100 (Vacuum Diagrams) Section 101 (Vacuum Diagrams) Section 102 (Vacuum Diagrams) Section 103 (Vacuum Diagrams) Section 104 (Engine Controls - Self-Diagnostics) Section 105 (Engine Controls - System & Component Testing) Section 106 (Engine Controls - Basic Diagnostic Procedures) Section 107 (Engine Controls - Basic Diagnostic Procedures) Section 108 (Engine Controls - System & Component Testing) Section 109 (Engine Controls - Troubleshooting - No Codes) Section 110 (Engine Controls - Trouble Shooting - No Codes) Section 111 (Supplemental Inflatable Restraint System) Section 112 (Common Specs & Procedures) Section 113 (Common Specs & Procedures) Section 114 (Common Specs & Procedures) Section 115 (Wheel Alignment Specifications) Section 116 (Wheel Alignment Specifications) Section 117 (Electrical Component Locator) Section 118 (Electrical Component Locator) Section 119 (System Wiring Diagrams) Section 120 (System Wiring Diagrams) Section 121 (System Wiring Diagrams) Section 122 (Disc Brakes) Section 123 (Cooling System Specifications & Drive Belt Routing) Section 124 (Axle Shafts) Section 125 (Charging System) Section 126 (Starting System) Section 127 (Rear Suspension System) Section 128 (Suspension System General Diagnosis) Section 129 (Anti-Lock Brake System) Section 130 (Rear Suspension System) Section 131 (Suspension General Diagnosis) Section 132 (Tires & Wheels) Section 133 (Engine Mechanical - 2.2L (L61) (Unit Repair)) Section 134 (Engine Mechanical - 2.2L (LN2) Unit Repair) Section 135 (Engine Mechanical - 2.4L (Unit Repair)) Section 136 (Engine Exhaust System) Section 137 (Wiring Systems (General Information)) Section 138 (Engine Mechanical - 2.2L (LN2) (On-Vehicle)) Section 139 (Wheel Alignment Specifications & Adjustment Procedures) Section 140 (Engine Mechanical - 2.2L (L61) (On-Vehicle)) Section 141 (Engine Mechanical - 2.4L (On-Vehicle)) Section 142 (Vibration Symptoms Diagnosis And Correction) Section 143 (Heating, Ventilation And Air Conditioning) Section 144 (HVAC Systems - Manual) Section 145 (HVAC Systems - Automatic) Section 146 (Power Steering System) Section 147 (Steering Wheel And Steering Column) Section 148 (Variable Effort Steering System) Section 149 (Wheel Alignment Specifications & Adjustment Procedures) Section 150 (Front Suspension System) Section 151 (Tires And Wheels) Section 152 (Tire Pressure Monitoring System) Section 153 (Suspension Control System - Suspension Damping) Section 154 (Drive Shaft) Section 155 (Antilock Brake System) Section 156 (Engine Mechanical - 5.7L) Section 157 (Engine Cooling System) Section 158 (Battery) Section 159 (Engine Exhaust System) Section 160 (Manual Transmission - Mm6/M12) Section 161 (Shift Interlock System) Section 162 (Automa

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.