🏷️ Basic Information Identification Make: Pontiac Model: GTO Year Range Covered: 2004-2006 Codes Vehicle Platform: GM Zeta Platform (specifically modified for Holden Monaro/Pontiac GTO) Transmission Codes Common: M12 (6-speed manual), 4L60-E (4-speed automatic) Engine Codes Common: LS1 (5.7L V8), LS2 (6.0L V8) 👋 Introduction Market Position Segment: Performance Sedan/Coupe, Muscle Car Revival Target Audience: Enthusiasts, DIY mechanics, owners of the 2004-2006 Pontiac GTO Competitive Analysis Competitors Era: Ford Mustang, Chevrolet Camaro (earlier generations), Dodge Charger (later generations), Nissan 350Z, Mitsubishi Lancer Evolution Key Features Design Origin: Rebadged Australian Holden Monaro Powertrain Focus: Rear-wheel drive, V8 engine performance Manual Value Proposition: Empowers owners with factory-level repair knowledge, saves on labor costs, enhances vehicle longevity 📋 Manual Details Coverage Areas General Coverage: Comprehensive service and repair for all GTO models 2004-2006 Page Count Estimated Page Count: Hundreds of pages (exact number not specified, but described as extensive) Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, disassembly, cylinder heads, pistons, crankshaft, camshaft, timing, lubrication system Engine Performance: Fuel injection, ignition system, emissions control, cooling system, starting and charging systems Transmission Manual: Clutch, gearbox, shifter mechanism, overhaul, repair Transmission Automatic: Torque converter, transmission control module (TCM), valve body, internal components, overhaul, repair Drivetrain: Driveshaft, differential, axles, CV joints Suspension: Front and rear suspension components, alignment, shock absorbers, springs, bushings Steering: Power steering system, steering column, steering rack, linkages Brakes: Brake system components (calipers, rotors, pads, lines, master cylinder), ABS, parking brake Electrical System: Wiring diagrams, battery, alternator, starter, lighting system, power accessories Body And Frame: Body panels, doors, hood, trunk, glass, interior trim, structural components HVAC: Heating, ventilation, and air conditioning system components, refrigerant, diagnostics Infotainment And Controls: Audio system, climate controls, instrument cluster, dashboard Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks and top-offs, tire rotation Troubleshooting: Diagnostic procedures, common problem identification, fault code interpretation Component Removal And Installation: Step-by-step guides for replacing major and minor components Engine Rebuild: Detailed instructions for complete engine disassembly and reassembly Transmission Overhaul: Detailed instructions for manual and automatic transmission rebuilds Brake Service: Pad and rotor replacement, caliper service, bleeding procedures Suspension And Steering Service: Component replacement, alignment specifications Electrical Diagnostics: Troubleshooting electrical faults using wiring diagrams and diagnostic tools HVAC Service And Recharge: System leak testing, refrigerant evacuation and recharge Technical Depth Depth: Comprehensive (from basic maintenance to complete component overhauls and diagnostics) Illustrations: Hundreds of illustrations to aid in repairs Searchability: Searchable PDF functionality Factory Knowledge: Covers procedures and knowledge as held by factory-trained technicians 📊 Manual Specifications File Format File Type: PDF Printability: Printable pages Print Quality Quality: Great quality service manual Binding Type Binding: N/A (Digital PDF format) Paper Type Paper Type: N/A (Digital PDF format) ⚙️ Engine Specifications Primary Engine Engine 2004: LS1 5.7L V8 Engine 2005 2006: LS2 6.0L V8 Performance Ls1 Horsepower Ls1: 350 hp @ 5200 rpm Torque Ls1: 365 lb-ft @ 4000 rpm Performance Ls2 Horsepower Ls2: 400 hp @ 6000 rpm Torque Ls2: 395 lb-ft @ 4400 rpm Fuel System Injection Type: Sequential Fuel Injection (SFI), Multi-port Fuel Injection (MPFI) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Cooling System Coolant Type: Dex-Cool (Orange long-life coolant), or equivalent silicate-free, phosphate-free, borate-free, nitrite-free, nitrITE-free OAT coolant Lubrication System Oil Type: SAE 5W-30 (Synthetic recommended for optimal performance and protection) Oil Capacity Ls1: 5.5 quarts (with filter change) Oil Capacity Ls2: 7.0 quarts (with filter change) 🔧 Transmission Standard Standard Transmission 2004: M12 Tremec T-56 6-speed Manual Standard Transmission 2005 2006: TR-6060 6-speed Manual (updated version of Tremec T-56) Optional Optional Transmission: 4L60-E 4-speed Automatic Features Manual Transmission Fluid: GM Synchromesh Friction Modified (or equivalent Dexron III/Mercon ATF for some components) Automatic Transmission Fluid: Dexron III/Mercon ATF 📐 Dimensions Exterior Wheelbase: 109.8 inches Length: 194.1 inches Width: 72.4 inches Height: 55.1 inches Weights Curb Weight Manual: ~3737 - 3850 lbs (depending on year and options) Curb Weight Automatic: ~3850 - 3950 lbs (depending on year and options) Wheels And Tires Wheel Size: 17-inch standard, 18-inch optional Tire Size Standard: P225/50R17 (front), P245/45R17 (rear) Tire Size Optional: P235/40R18 (front), P265/35R18 (rear) Bolt Pattern: 5x120 mm (5x4.72 inches) Center Bore: 69.4 mm (for factory wheels) 🛡️ Safety Features Ratings NHTSA Frontal Crash Rating: 5-star (Driver and Passenger) IIHS Front Offset Crash Rating: Good (for models tested) Active Features ABS: Standard Anti-lock Braking System (ABS) Traction Control: Traction Control System (TCS) - standard on most models Stability Control: Electronic Stability Control (ESC) - introduced on later models, check specific year/trim Passive Features Airbags: Frontal airbags (driver and passenger), optional side airbags Seatbelts: 3-point inertia-reel seat belts with pretensioners 💡 Technology Features Infotainment Audio System: Standard AM/FM/CD player with optional premium sound system (e.g., Pioneer), some models featured subwoofer. Instrument Cluster: Analog gauges, tachometer, speedometer,...