Manual Coverage
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Systems Covered
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Powertrain:
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Engine (3.1L V6, 3.8L V6), Transmission (4T60-E 4-speed automatic), Drivetrain, Fuel System, Exhaust System
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Chassis:
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Suspension (Front MacPherson strut, Rear independent multi-link), Steering (Power-assisted rack and pinion), Brakes (Front disc, Rear drum, ABS)
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Electrical:
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Wiring Diagrams, Lighting, Ignition System, Starting System, Charging System, Instrument Cluster, Power Accessories, Body Control Modules
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Body & HVAC:
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Body Panels, Doors, Windows, Seats, HVAC System (Heating, Ventilation, Air Conditioning), Emissions Control
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Procedures Included
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Routine Maintenance:
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Oil and filter changes, fluid checks and top-offs, tire rotation, spark plug replacement, air filter replacement
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Component Repair:
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Engine diagnostics and repair, transmission overhaul, brake system repair, suspension component replacement, steering system service, electrical system troubleshooting
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Troubleshooting:
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Diagnostic trouble codes (DTCs), symptom-based troubleshooting guides, electrical schematic interpretation
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Specifications:
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Torque specifications, clearances, fluid capacities, pressure readings, wiring diagrams
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Technical Depth
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Depth:
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Factory-level detail covering diagnostics, repair, overhaul, and maintenance procedures.
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Engine Specifications
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Primary Engine
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Engine Code:
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L36 (3.8L V6) and L67 (Supercharged 3.8L V6) for some Lumina models, LG8 (3.1L V6) also common.
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Engine Code 1
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Engine:
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3.1L V6 (VIN R)
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Engine Displacement 1
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Displacement:
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3.1 Liters (189 cu in)
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Engine Power 1
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Horsepower:
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160 hp @ 5200 rpm (approximate, varies slightly by year/trim)
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Engine Torque 1
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Torque:
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185 lb-ft @ 4000 rpm (approximate, varies slightly by year/trim)
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Engine Code 2
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Engine:
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3.8L V6 (VIN K)
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Engine Displacement 2
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Displacement:
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3.8 Liters (231 cu in)
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Engine Power 2
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Horsepower:
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170 hp @ 4400 rpm (approximate, varies slightly by year/trim)
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Engine Torque 2
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Torque:
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220 lb-ft @ 3200 rpm (approximate, varies slightly by year/trim)
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Fuel System
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Fuel Delivery:
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Sequential Multi-Port Fuel Injection (MPI)
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Ignition System
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Ignition Type:
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Distributorless Ignition System (DIS)
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Emission Control
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Emissions:
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Catalytic converter, EGR (Exhaust Gas Recirculation), Positive Crankcase Ventilation (PCV)
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Safety Features
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Ratings
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NHTSA Driver Front Impact:
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4 Stars (as per NHTSA data for similar GM vehicles of the era).
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NHTSA Passenger Front Impact:
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4 Stars (as per NHTSA data for similar GM vehicles of the era).
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Active Features
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ABS:
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Standard on most trims, Anti-lock Braking System.
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Passive Features
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Airbags:
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Driver and front passenger airbags.
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Seatbelts:
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Front and rear seat belts, with front pretensioners.
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Construction
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Body Structure:
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Unit-body construction with front and rear crumple zones.
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Maintenance
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Service Intervals
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Oil Change Interval:
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Every 3,000 - 7,500 miles (5,000 - 12,000 km) or 6-12 months, depending on driving conditions and oil type used (consult manual for specific recommendations).
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Air Filter Replacement:
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Every 15,000 - 30,000 miles (24,000 - 48,000 km) or as needed based on inspection.
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Spark Plug Replacement:
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Every 60,000 - 100,000 miles (96,000 - 160,000 km) for platinum or iridium plugs. Consult manual for specific type.
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Fluid Specifications
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Engine Oil:
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SAE 5W-30 for most conditions (consult manual for specific viscosity based on temperature).
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Coolant:
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GM-specific orange coolant (50/50 mix of ethylene glycol and distilled water).
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Brake Fluid:
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DOT 3.
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Known Issues
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Common Wear Items:
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Strut mounts, ball joints, tie rod ends, exhaust system components, fuel pump, intake manifold gaskets (especially on 3.1L). Oil leaks from valve covers and oil pan are also common.
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Electrical Issues:
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Intermittent electrical gremlins, issues with power windows, locks, and radio are not uncommon with age. The Body Control Module (BCM) can be a source of various issues.
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Maintenance Schedule Highlight
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Transmission Service:
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Transmission fluid and filter change recommended every 30,000 - 60,000 miles (48,000 - 96,000 km).
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