Target Audience:
DIY owners and professional technicians servicing the 2004 Buick Rainier
Market Segment:
Mid-size luxury SUV
Positioning:
Buick's entry in the GMT360 mid-size SUV lineup, above the Oldsmobile Bravada in trim level
Platform Relatives:
Chevrolet TrailBlazer, GMC Envoy, Isuzu Ascender, Saab 9-7X
Advantage:
Premium interior trim and quieter tuning compared to platform siblings
Service Advantage:
Shares GM GMT360 mechanicals, so repair procedures are well documented and parts are widely available
Distinctive Powertrain:
Available Atlas 4.2L inline-6 or 5.3L V8
Chassis:
Body-on-frame with rear-wheel drive or all-wheel drive
Comfort:
QuietTuning emphasis with premium interior appointments
Engine:
Complete mechanical, valve train, lubrication, and cooling system service
Fuel and Emissions:
SFI fuel injection, air intake, exhaust, and emissions controls
Ignition and Electrical:
Ignition, charging, starting, wiring diagrams, and lighting
Transmission:
4L60-E automatic transmission and transfer case service
Driveline:
Rear axle, driveshaft, and all-wheel drive components
Suspension:
Front torsion bar independent suspension and rear multi-link solid axle
Steering:
Power rack and pinion steering
Brakes:
Front and rear disc brakes, ABS, and hydraulic systems
HVAC:
Heating, ventilation, and air conditioning
Body and Accessories:
Doors, tailgate, seats, glass, trim, wipers, and mirrors
Diagnostics:
Fault code troubleshooting and symptom-based diagnostics
Step-by-Step Repair:
Disassembly, inspection, and reassembly procedures
Specifications:
Torque specifications, clearances, and adjustment values
Maintenance:
Fluids, filters, tune-ups, and scheduled service
Wiring Diagrams:
Complete electrical schematics
Special Tools:
Tool requirements and usage notes
Depth Level:
Full factory-level service detail for technicians and DIY owners
Illustrations:
Photos and diagrams supporting procedures
Part Numbers:
Referenced where applicable in OE procedures
Fluid Capacities:
Included for engine, transmission, cooling, and other systems
Torque Data:
Torque specifications provided throughout repair procedures
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Engine Type:
Inline 6-Cylinder (Atlas LL8)
Displacement:
4.2 Liters (256 cu in)
Bore X Stroke:
3.74 in x 3.62 in (95.0 mm x 92.0 mm)
Compression Ratio:
10.0:1
Horsepower:
275 hp @ 5600 rpm
Torque:
275 lb-ft @ 3200 rpm
Displacement:
5.3 Liters (327 cu in)
Bore X Stroke:
3.78 in x 3.74 in (96.0 mm x 95.0 mm)
Horsepower:
290 hp @ 5200 rpm
Torque:
325 lb-ft @ 4000 rpm
Fuel Delivery:
Sequential Electronic Fuel Injection (SFI)
Fuel Type:
Regular unleaded gasoline
Fuel Tank Capacity:
Approximately 22 gallons
NHTSA Crash Tests:
Generally strong results for the GMT360 platform; consult official NHTSA records for the 2004 Rainier
Specific Score Data:
N/A - not specified in the manual; verify with NHTSA/IIHS
ABS:
4-wheel anti-lock braking system
Traction Control:
Available traction control system
Stability Control:
StabiliTrak electronic stability control available
Airbags:
Dual front airbags with side-impact airbags available
Seatbelts:
Three-point belts with pretensioners at front outboard positions
Structure:
Body-on-frame construction with reinforced passenger compartment
Audio System:
AM/FM stereo with CD player; premium Bose audio available
Optional Features:
OnStar and DVD-based rear entertainment available on upper trims
OnStar:
Available OnStar telematics system
Driver Assistance Systems:
N/A - no modern ADAS suite on this model year
Climate:
Automatic dual-zone climate control available
Oil Change Interval:
7,500 miles or 6 months (whichever comes first)
Tire Rotation:
With every oil change, approximately 7,500 miles
Air Filter:
Inspect regularly; replace as conditions require
Recommended Oil Viscosity:
SAE 5W-30
Oil Capacity 4.2L I6:
7.0 Quarts
Oil Capacity 5.3L V8:
N/A - not specified in source data; check dipstick or OE literature
Coolant Capacity:
14.9 Quarts
Coolant Type:
Dex-Cool extended-life coolant
Transmission Fluid:
Dexron-type automatic transmission fluid per OE specification
Front Tire Pressure:
30 psi
Rear Tire Pressure:
30 psi (verify with door placard)
Known Issues / Common Wear
4.2L I6:
Known for camshaft position actuator and valve timing-related codes on high-mileage engines
Ball Joints:
Front suspension ball joints are a common wear item on GMT360 trucks
Fan Clutch:
Cooling fan clutch failures are reported on the inline-6
4L60-E:
Monitor for delayed engagement and shift quality as mileage climbs
Manufacturer:
General Motors (Buick division)
Brand Position:
Buick's first mid-size luxury SUV
Platform Family:
GMT360, shared with Chevrolet TrailBlazer and GMC Envoy
Model Years:
2004 through 2007
Debut:
Introduced for the 2004 model year, replacing the Buick's role left by the discontinued Oldsmobile Bravada
Generation:
Single generation (First Generation)
Production Location:
Moraine Assembly Plant, Dayton, Ohio