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Introduction
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Market Position
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Market Segment:
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Compact/Mid-size Sedan and Coupe, aimed at value-conscious buyers seeking sporty styling and decent performance.
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Competitive Analysis
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Key Competitors 1999:
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Ford Contour, Honda Accord, Toyota Camry, Chevrolet Malibu, Dodge Stratus
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Key Features
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Model Highlights:
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Distinctive 'sculpted' exterior design, available in coupe and sedan body styles, offer of a supercharged engine in higher trims (GT/GTP).
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Manual Utility
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Primary Benefit:
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Empowers owners and technicians to perform maintenance, repairs, and diagnostics efficiently and accurately, reducing reliance on costly professional services.
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Digital Advantage
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Advantages Of Download:
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Instant access, portability on mobile devices for on-the-go repairs, eco-friendly (saves trees), printable pages for clean workshop use, lifetime replacement policy.
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Manual Coverage
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Systems Covered
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Engine Systems:
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Engine Removal and Installation, Engine Specifications, Intake & Exhaust Systems, Fuel System, Lubrication and Cooling System, Engine Mechanical Components
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Drivetrain Systems:
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Transmission, Drive Chain & Sprockets (as applicable to specific models/engines, primarily Automatic Transaxle)
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Chassis Systems:
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Steering System, Shocks (Suspension), Brakes, Wheels and Tires
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Electrical Systems:
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Electrical System, Wiring Diagrams, Lighting, Ignition System, Charging System, Starting System, Instrumentation
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Body Systems:
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Body Work, Interior Components, Exterior Trim, Doors, Windows, Seats, Bumpers
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Comfort And Convenience:
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HVAC System, Climate Control, Audio System, Power Accessories
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Procedures Included
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Maintenance Procedures:
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Routine Maintenance, Oil Changes, Filter Replacements, Fluid Checks and Replacements, Belt Inspections and Replacements, Spark Plug Replacement
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Repair Procedures:
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Component Overhaul, Component Replacement, Engine Reassembly, Transmission Service, Suspension Repair, Brake Service, Electrical Component Diagnosis and Repair
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Diagnostic Procedures:
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Advanced Troubleshooting, Symptom-based Diagnostics, Diagnostic Trouble Codes (DTCs), Check Engine Light Diagnosis
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Installation Procedures:
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Engine Installation, Transmission Installation, Component Reassembly
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Technical Depth
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Depth Of Information:
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Comprehensive, covering everything from basic maintenance to advanced diagnostics and component-level repair. Includes detailed torque specifications, diagnostic flowcharts, and wiring diagrams.
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Engine Specifications
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Primary Engine
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Engine Option 1 Code:
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L36 (3.8L V6)
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Engine Option 1 Displacement:
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3.8 Liters (231 cubic inches)
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Engine Option 1 Cylinders:
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V6
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Engine Option 1 Horsepower:
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Approx. 190-200 hp @ 5000-5200 rpm
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Engine Option 1 Torque:
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Approx. 225-230 lb-ft @ 2800-3000 rpm
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Secondary Engine
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Engine Option 2 Code:
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L67 (3.8L Supercharged V6)
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Engine Option 2 Displacement:
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3.8 Liters (231 cubic inches)
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Engine Option 2 Cylinders:
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V6 (Supercharged)
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Engine Option 2 Horsepower:
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Approx. 240 hp @ 5200 rpm
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Engine Option 2 Torque:
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Approx. 280 lb-ft @ 3600 rpm
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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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Fuel Type:
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Unleaded gasoline (Octane rating specified in manual)
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Lubrication
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Oil Type And Capacity:
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Refer to manual for specific SAE viscosity grade (e.g., 5W-30) and capacity (approx. 4.5 quarts with filter for 3.8L V6).
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Cooling System
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Coolant Type:
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Ethylene glycol based antifreeze, typically Dex-Cool compatible coolant (orange) for later models or traditional green coolant for earlier production runs, as specified in manual. Capacity approx. 8-10 quarts.
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Transmission
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Standard
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Standard Transmission:
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4-Speed Automatic Transaxle (4T60-E, 4T65-E)
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Optional
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Optional Transmission:
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None for 1999 model year in North America.
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Features
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Transmission Features:
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Electronically controlled, front-wheel drive, potentially with traction control system (TCS) on higher trims.
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Fluid Specifications
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Transmission Fluid Type:
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Dexron-III Automatic Transmission Fluid (ATF), or equivalent as specified in the manual.
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Fluid Capacity
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Transmission Fluid Capacity:
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Approximately 4.5-5.5 quarts for a fluid change, larger capacity for a full overhaul. Refer to manual for exact specification.
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Maintenance
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Service Intervals
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Oil Change Interval:
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Typically every 3,000-7,500 miles or 3-6 months, depending on driving conditions and oil type used. Refer to manual for specific recommendation.
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Transmission Fluid Service:
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Inspect every 30,000 miles, replace approximately every 50,000-100,000 miles, depending on severity of use. Refer to manual.
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Spark Plug Replacement:
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Typical interval of 60,000-100,000 miles for platinum or iridium spark plugs, depending on type specified in manual.
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Fluid Specifications
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Brake Fluid Type:
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DOT 3 or DOT 4, as specified in the owner's manual. Check reservoir cap for marking.
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Power Steering Fluid:
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GM Power Steering Fluid or Dexron-III ATF, as specified in the manual.
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Known Issues
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Common Problems 1999 Grand Am:
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Intake manifold gasket leaks (particularly on 3.8L V6), upper strut mount bearing failure, power steering pump noise, ABS sensor failures, door lock actuator issues, potential for head gasket issues on certain engine variants (though less common on the '99 3.8L compared to earlier models).
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Filter Part Numbers
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Oil Filter Examples:
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ACDelco PF1218, Fram PH3500, Bosch 3422 (Verify compatibility with specific engine via manual or parts lookup).
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Air Filter Examples:
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ACDelco A2191C, Fram CA3944 (Verify compatibility with specific engine via manual or parts lookup).
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