2004 Buick Century BaseFACTORY OEM SERVICE PROCEDURE

External Pages

's manual. Be very cautious using repair info from here because these pages may not apply to your vehicle. Different car Section 1 (Drive Axles) Section 2 (Engine Controls Self-Diagnostics - 5.7L Corvette) Section 3 (Automatic Transmission Servicing) Section 4 (Engine Controls - Service & Adjustment Specifications) Section 5 (Engine Controls - Service & Adjustment Specifications) Section 6 (Automatic Transaxle Servicing) Section 7 (Electrical Component Locator) Section 8 (System Wiring Diagrams) Section 9 (System Wiring Diagrams) Section 10 (System Wiring Diagrams) Section 11 (Engine Controls - Removal & Installation, Overhaul) Section 12 (Engine Controls - Removal & Installation) Section 13 (Engine Controls Self-Diagnostics) Section 14 (Vacuum Diagrams) Section 15 (Vacuum Diagrams) Section 16 (Engine Controls - Self-Diagnostics) Section 17 (Engine Controls - System & Component Testing) Section 18 (Engine Controls - Basic Diagnostic Procedures) Section 19 (Engine Controls - Basic Diagnostic Procedures) Section 20 (Engine Controls - System & Component Testing) Section 21 (Computer Relearn Procedures) Section 22 (Engine Controls - Troubleshooting - No Codes) Section 23 (Engine Controls - Trouble Shooting - No Codes) Section 24 (Engine Control System - Sensor Range Charts) Section 25 (Supplemental Inflatable Restraint System) Section 26 (Common Specs & Procedures) Section 27 (Common Specs & Procedures) Section 28 (Wheel Alignment Specifications) Section 29 (Wheel Alignment Specifications) Section 30 (Electrical Component Locator) Section 31 (System Wiring Diagrams) Section 32 (Disc Brakes) Section 33 (Vibration - Drivetrain) Section 34 (Cooling System Specifications & Drive Belt Routing) Section 35 (Axle Shafts) Section 36 (Charging System) Section 37 (Starting System) Section 38 (Rear Suspension System) Section 39 (Suspension System General Diagnosis) Section 40 (Testing Wiring Systems For Intermittent & Poor Connections) Section 41 (Vibration Symptoms Diagnosis And Correction) Section 42 (Heating, Ventilation And Air Conditioning) Section 43 (HVAC Systems - Manual) Section 44 (HVAC Systems - Automatic) Section 45 (Power Steering System) Section 46 (Steering Wheel And Steering Column) Section 47 (Variable Effort Steering System) Section 48 (Wheel Alignment Specifications & Adjustment Procedures) Section 49 (Front Suspension System) Section 50 (Tires And Wheels) Section 51 (Tire Pressure Monitoring System) Section 52 (Suspension Control System - Suspension Damping) Section 53 (Drive Shaft) Section 54 (Antilock Brake System) Section 55 (Engine Mechanical - 5.7L) Section 56 (Engine Cooling System) Section 57 (Battery) Section 58 (Engine Exhaust System) Section 59 (Manual Transmission - Mm6/M12) Section 60 (Shift Interlock System) Section 61 (Automatic Transmission - 4L60-E/4L65-E (Service & Replacement)) Section 62 (Manual Transmission Clutches) Section 63 (Data Link Communication System) Section 64 (Lighting Systems) Section 65 (Wiper System And Washer System) Section 66 (Entertainment System) Section 67 (Personalization Systems) Section 68 (Body Control System) Section 69 (Instrument Panel, Gages, And Console) Section 70 (Keyless Entry System) Section 71 (Horn System) Section 72 (Theft Deterrent System) Section 73 (Cruise Control System) Section 74 (Stationary Window System) Section 75 (Bumper System) Section 76 (Body Front End) Section 77 (Door System, Mirror System & Window System) Section 78 (Folding Top System) Section 79 (Seat System) Section 80 (Interior Trim) Section 81 (Body Rear End) Section 82 (Seat Belt System) Section 83 (Jacking And Lifting) Section 84 (Transfer Case - Overhaul - STEYR) Section 85 (Engine Controls 3.8L (Diagnostic Information & Procedures)) Section 86 (Engine Controls 3.8L (Introduction, Service & Replacement)) Section 87 (Engine Mechanical - 3.8L) Section 88 (Engine Controls Troubleshooting & Diagnosis 3.8L) Section 89 (Engine Controls Diagnosis 3.8L (DTC P0138 To P0453)) Section 90 (Engine Controls Diagnosis 3.8L (DTC P0030 To DTC P0137)) Section 91 (Engine Controls Diagnosis 3.8L (DTC P0455 To P1404)) Section 92 (Engine Controls Diagnosis 3.8L (DTC P1640 To P1670)) Section 93 (Cellular Communication System) Section 94 (Data Link Communication System) Section 95 (Body Control System) Section 96 (Battery, Charging System And Starting System) Section 97 (Wiring Systems) Section 98 (Stationary Window System) Section 99 (Horn System) Section 100 (Lighting Systems) Section 101 (Door System, Mirror System & Window System) Section 102 (Entertainment System) Section 103 (Service Programming System) Section 104 (Interior Trim) Section 105 (Instrument Panel System Displays, Gauges And Console) Section 106 (Seat System) Section 107 (Sunroof System) Section 108 (Cautions And Notices) Section 109 (Cruise Control System) Section 110 (Antilock Brake System, Traction Control System & Stability Control System) Section 111 (Engine Controls (Diagnostic Information & Procedures) - 3.8L) Section 112 (Supplemental Inflatable Restraint System) Section 113 (Engine Controls (Introduction) - 3.8L) Section 114 (General Information) Section 115 (Steering Wheel And Steering Column) Section 116 (HVAC Systems - Manual) Section 117 (Body Rear End) Section 118 (Keyless Entry System) Section 119 (Personalization Systems) Section 120 (Theft Deterrent System) Section 121 (Accessory Power Socket) Section 122 (Engine Controls Diagnosis (DTC P0453 To DTC P1374) - 3.8L) Section 123 (Shift Interlock System) Section 124 (Hydraulic Brake System) Section 125 (Retained Accessory Power System) Section 126 (Seat Belt System) Section 127 (Wiper System And Washer System) Section 128 (Body Front End) Section 129 (Bumper System) Section 130 (Exterior Trim) Section 131 (Water Leaks) Section 132 (Tires & Wheels) Section 133 (Frame And Underbody) Section 134 (Engine Mechanical - 3.8L) Section 135 (Power Steering System) Section 136 (Front Suspension System) Section 137 (Automatic Transaxle - 4T65-E (Introduction, Service & Replacement)) Section 138 (Wheel Alignment Specifications & Adjustment Procedures) Section 139 (Engine Cooling System) Section 140 (Tire Pressure Monitoring System) Section 141 (Parking Brake System) Section 142 (Electronic Steering System - Variable Effort Steering) Section 143 (Disc Brake System) Section 144 (Suspension System General Diagnosis) Section 145 (Wheel Drive Shafts) Section 146 (Rear Suspension System) Section 147 (Maintenance And Lubrication) Section 148 (Vibration Symptoms Diagnosis And Correction) Section 149 (Heating, Ventilation & Air Conditioning) Section 150 (Engine Exhaust System) Section 151 (Automatic Transaxle, 4T65-E (Troubleshooting)) Section 152 (Engine Controls Diagnosis (DTC P0138 To P0452) - 3.8L) Section 153 (Engine Controls (Troubleshooting & Diagnosis) - 3.8L) Section 154 (Automatic Transaxle, 4T65-E (Diagnostic Information & Procedures)) Section 155 (Engine Controls Diagnosis (DTC P0030 To P0137) - 3.8L) Section 156 (Automatic Transaxle, 4T65-E Diagnosis (DTC P0218 To P1819)) Section 157 (Engine Controls Diagnosis (DTC P1380 To DTC P2229) - 3.8L) Section 158 (Automatic Transaxle, 4T65-E Diagnosis (DTC P1820 To DTC P1887)) Section 159 (Cruise Control System) Section 160 (Data Link Communication System) Section 161 (Body Control System) Section 162 (Battery, Charging System & Starting System) Section 163 (Antilock Brake System, Traction Control System & Stability Control System) Section 164 (Manual Transmission -- TREMEC 6-Speed) Section 165 (Automatic Transmission, 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P2761)) Section 166 (Engin

Factory Service Tools

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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.

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