🏷️ Basic Information

Make:

Pontiac

Model:

GTO

Product Name:

Pontiac GTO 2004-2006 Service Manual

Generation Code:

Third Generation (GM Zeta Platform)

Chassis Code:

Y03 (Australia), GM MDI

👋 Introduction

Positioning:

A performance-oriented coupe designed to evoke the spirit of the original Australian Holden Monaro, offered in North America as the Pontiac GTO.

Competitors:

Ford Mustang GT, Chevrolet Camaro SS, Dodge Challenger (later models), Mitsubishi Eclipse GT.

Performance Focus:

Rear-wheel drive platform, powerful V8 engines, sport-tuned suspension.

Design Origin:

Based on the Australian Holden Monaro platform, giving it unique styling and engineering.

📋 Manual Details

Model Years Covered:

2004, 2005, 2006

Trim Levels Covered:

All

Estimated Page Count:

1500+

Type:

Comprehensive Service Manual / Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Powertrain:

Engine mechanical, fuel system, ignition system, cooling system, lubrication system, exhaust system, transmission (manual & automatic), drivetrain components (driveshafts, differentials, axles).

Chassis:

Suspension (front & rear), steering system, brake system (front & rear discs, ABS, EBD), wheel alignment.

Electrical:

Wiring diagrams, battery, charging system, starting system, lighting, instruments, gauges, HVAC controls, power accessories (windows, locks, mirrors), audio system, SRS (airbag) system, body control modules.

Body:

Body panels, doors, hood, trunk, bumpers, glass, interior trim, seats, weatherstripping, collision repair information.

Maintenance:

Oil change, filter replacement, fluid checks and top-offs, belt inspection and replacement, spark plug replacement, brake pad and rotor replacement, tire rotation.

Diagnostics:

Troubleshooting guides for common issues, diagnostic trouble codes (DTCs) interpretation, symptom-based diagnostics for all major systems.

Repair:

Engine component removal and installation (e.g., cylinder heads, pistons, crankshaft), transmission overhaul, brake caliper and master cylinder replacement, suspension component replacement (struts, control arms), steering rack replacement, electrical component repair and replacement.

Depth:

Complete overhaul and repair procedures, detailed diagnostic steps, torque specifications for all fasteners, electrical schematics, component specifications and tolerances, factory service procedures.

📊 Manual Specifications

File Quality:

High-resolution, searchable text, printable pages.

Print Quality Description:

Designed for clear printing of diagrams, schematics, and text.

Binding Type:

N/A (Digital PDF)

Paper Type Description:

N/A (Digital PDF)

⚙️ Engine Specifications

Engine Code:

LS1

Displacement:

5.7L (346 cu in)

Configuration:

V8, Overhead Valve (OHV), Pushrod

Horsepower:

350 hp @ 5200 rpm

Torque:

365 lb-ft @ 4000 rpm

Engine Code:

LS2

Displacement:

6.0L (364 cu in)

Configuration:

V8, Overhead Valve (OHV), Pushrod

Horsepower:

400 hp @ 5200 rpm

Torque:

395 lb-ft @ 4400 rpm

Induction:

Sequential Fuel Injection (SFI)

Fuel Type:

Unleaded Gasoline (91+ octane recommended for optimal performance)

🔧 Transmission

Type:

Tremec T-56 6-speed Manual

Type:

4-speed Automatic (4L65-E)

Type:

Tremec T-56 6-speed Manual

Type:

4-speed Automatic (4L65-E)

Clutch Type:

Hydraulic

Rear Axle:

Limited Slip Differential (LSD)

📐 Dimensions

Wheelbase:

114.1 inches (2900 mm)

Overall Length:

194.1 inches (4930 mm)

Overall Width:

75.3 inches (1913 mm)

Overall Height:

53.7 inches (1364 mm)

Front Headroom:

37.5 inches (953 mm)

Front Legroom:

43.5 inches (1105 mm)

Rear Headroom:

35.3 inches (897 mm)

Rear Legroom:

30.0 inches (762 mm)

Trunk Volume:

14.1 cu ft (399 L)

Curb Weight Manual:

3725 lbs (1690 kg)

Curb Weight Auto:

3755 lbs (1703 kg)

Gross Vehicle Weight Rating Gvwr:

4675 lbs (2120 kg)

🛡️ Safety Features

NHTSA Front Impact:

5-Star Driver, 5-Star Passenger

NHTSA Side Impact:

4-Star Front Passenger, 4-Star Rear Passenger

IIHS Front Offset:

Good

ABS:

Standard 4-wheel Anti-lock Braking System

Traction Control:

Standard

Electronic Brake Force Distribution:

Standard (EBD)

Airbags:

Frontal airbags for driver and front passenger, available side-impact airbags.

Seatbelts:

3-point active seatbelts with pretensioners.

Rollover Protection:

Reinforced roof structure.

💡 Technology Features

Audio System:

Standard AM/FM/CD player. Optional premium sound system with amplifier and subwoofer.

Display:

Center console mounted display for audio and climate controls.

Cruise Control:

Standard

Keyless Entry:

Standard

Onstar:

Available on select models.

🔧 Maintenance

Oil Change Interval:

Every 7,500 miles (12,000 km) or 6 months, whichever comes first. Check oil level regularly.

Air Filter Replacement:

Inspect every 15,000 miles (24,000 km), replace as needed. Replace every 30,000 miles (48,000 km) or sooner if driving in dusty conditions.

Spark Plug Replacement:

Replace every 100,000 miles (160,000 km) with iridium-tipped plugs.

Transmission Fluid Change Auto:

Every 45,000 miles (72,000 km) or 36 months for severe service, 90,000 miles (144,000 km) or 72 months for normal service.

Transmission Fluid Change Manual:

Every 45,000 miles (72,000 km) or 36 months. Check for leaks.

Engine Oil:

SAE 5W-30 Synthetic (GM dexos1 Gen 2 or equivalent). Capacity: 7 Quarts (6.6 Liters) with filter.

Coolant:

GM Dex-Cool (Orange) Long-Life Antifreeze/Coolant. 50/50 mix with distilled water. Capacity: Approximately 12.7 Quarts (12.0 Liters).

Brake Fluid:

DOT 3 or DOT 4 compatible. Check level regularly, flush and replace every 2 years.

Power Steering Fluid:

GM Power Steering Fluid or equivalent (Dexron VI ATF often acceptable, check specific model year). Check level regularly.

Transmission Fluid Auto:

Dexron VI Automatic Transmission Fluid. Capacity: 5.5 Quarts (5.2 Liters) dry fill, 4.5 Quarts (4.3 Liters) refill.

Transmission Fluid Manual:

GM Synchromesh Manual Transmission Fluid (or equivalent API GL-4, 75W-85 or 75W-90 gear oil). Capacity: 2.5 Pints (1.2 Liters).

Differential Fluid:

GM 75W-90 Synthetic Rear Axle Lubricant (with limited slip additive if specified). Capacity: 1.75 Quarts (1.66 Liters).

Fuel Pump Reliability:

Some models experienced premature fuel pump failure.

Interior Rattles And Squeaks:

Common in GM vehicles of this era due to interior trim fitment and materials.

Clutch Wear:

High-performance nature can lead to faster clutch wear, especially with aggressive driving.

Brake Dust And Wear:

Performance brakes can generate significant dust and wear faster than standard pads.

Exhaust Hangers Failure:

Rubber exhaust hangers can degrade and fail over time.

📚 Vehicle History

Pontiac Legacy:

Pontiac's history of performance-oriented vehicles, including the original GTO muscle car, Firebird, and Trans Am.

Third Generation Introduction:

Launched for the 2004 model year, representing Pontiac's attempt to revive the GTO nameplate with a modern interpretation.

Key Changes 2005:

Upgraded LS2 6.0L engine, revised front fascia, brighter dashboard lighting, improved exhaust note.

Key Changes 2006:

Revised rear spoiler (optional), new wheel options, introduction of optional hood scoops, revised interior color options.

Assembly Location:

Elizabeth, South Australia, Australia (Holden's plant)

Production Years:

2004-2006

Total Production Units:

~40,846 (US and Canada combined)

🏆 Awards & Recognition

Car And Driver 10Best:

Named to Car and Driver's 10Best list for 2004.

Motor Trend Car Of The Year:

Competed for Motor Trend Car of the Year.