Basic Information Identification Make: Chevrolet Model: Lumina APV Year: 1991 Body Style: Minivan Codes Platform Code: GM U-body Introduction Market Position Positioning: A comprehensive digital service and repair manual for DIY enthusiasts and professional technicians seeking factory-level information for the 1991 Chevrolet Lumina APV. Competitive Analysis Analogy To Print: Offers the detail and accuracy of traditional printed factory service manuals but with the convenience of digital access and searchability. Key Features Licensing: Officially licensed, derived from OE (Original Equipment) materials. Developer: RepairSurge Access: 1-year access with discounts for extensions. Compatibility: Compatible with PC, laptop, smartphone, and tablet via web browser. Manual Details Coverage Areas Primary Coverage: 1991 Chevrolet Lumina APV Page Count Estimated Page Count: Extensive (specific number not provided, but implied to be comprehensive for OE-level repair) Manual Type Type: Service and Repair Manual Software Language Language: English Format Format: Digital Download (PDF or similar web-accessible format) Manual Coverage Systems Covered Engine Mechanical: Yes Engine Performance: Yes Fuel System: Yes Ignition System: Yes Exhaust System: Yes Transmission Automatic: Yes Drivetrain Front Wheel Drive: Yes Suspension Front: Yes Suspension Rear: Yes Steering System: Yes Brake System: Yes Electrical System Charging: Yes Electrical System Starting: Yes Lighting System: Yes Instrumentation: Yes HVAC System: Yes Body Interior: Yes Body Exterior: Yes Wiring Diagrams: Yes Procedures Included Routine Maintenance: Yes Troubleshooting: Yes Component Repair: Yes Component Replacement: Yes Diagnostic Procedures: Yes Overhaul Procedures: Yes Technical Depth Depth: OE-Level: Covers everything from basic maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures and specifications. Manual Specifications File Format File Type: Digital Download (likely PDF) Print Quality Quality: High-resolution, derived from original factory materials Binding Type Binding: N/A (Digital) Paper Type Paper: N/A (Digital) Engine Specifications Primary Engine Engine Type: 3.1L V6 (3100 SFI) Engine Code: L82 (commonly associated with this engine in GM vehicles) Displacement: 3.1 Liters (189 cubic inches) Performance Horsepower Est: Approximately 140-150 HP Torque Est: Approximately 170-180 lb-ft Fuel System Fuel Delivery: Sequential Multi-Port Fuel Injection (SMPI) or Central Multi-Port Fuel Injection (CMPI) depending on specific build date/variant. Fuel Type: Unleaded Gasoline (87 octane recommended) Transmission Standard Transmission Type: 4-speed Automatic Transaxle Transmission Model Code Est: THM3T40-E (or similar GM 4-speed electronic automatic) Optional Optional Transmissions: None typically offered for this model year and engine combination. Features Drive Layout: Front-Wheel Drive (FWD) Dimensions Exterior Length: 179.0 inches Width: 74.1 inches Height: 68.7 inches Wheelbase: 109.5 inches Weights Curb Weight Est: Approximately 3,500 - 3,800 lbs Safety Features Ratings NHTSA Driver Front Impact Est: Likely 3-star or 4-star based on era standards (specific data for this year/model is scarce). NHTSA Passenger Front Impact Est: Likely 3-star or 4-star based on era standards. Active Features ABS: Available on some models, typically as an option. Passive Features Airbags: Driver-side airbag standard, passenger airbag not available. Seat Belts: Front and rear seat belts, likely with lap belts in the rear center position. Technology Features Infotainment Radio Options: AM/FM stereo with cassette player, optional CD player available on higher trims. Speakers: Typically 4 or 6 speaker configurations. Driver Assistance Cruise Control: Standard on most models. Connectivity Early Connectivity: No integrated digital connectivity features like Bluetooth or USB. Relied on aftermarket accessory integration. Maintenance Service Intervals Oil Change Interval: Every 3,000 miles or 3 months (typical for the era, though synthetic oil could extend this). Transmission Fluid Change: Every 30,000 - 50,000 miles or as per severe duty schedule. Coolant Change: Every 2 years or 30,000 miles (using conventional green coolant). Fluid Specifications Engine Oil Type: API SG or SG/CD, SAE 5W-30 (consult manual for exact spec based on temperature) Engine Oil Capacity: 4.5 US quarts (with filter) Transmission Fluid Type: Dexron-III (or equivalent automatic transmission fluid) Transmission Fluid Capacity: Approximately 10.0 - 11.0 US quarts (for a complete fluid change/overhaul) Known Issues Common Problem 1: Power steering pump leaks and whine. Common Problem 2: Intake manifold gasket leaks (a common issue on GM 3.1L V6 engines of this era). Common Problem 3: Headlight actuator failure (on pop-up headlights). Common Problem 4: Transmission solenoid issues or gradual wear leading to delayed shifts. Common Problem 5: HVAC blend door actuator failures. Vehicle History Brand Heritage Heritage Connection: Part of Chevrolet's diversification into the minivan segment, leveraging GM's global platforms. Model Evolution Generation Launch: The Lumina APV was part of GM's first generation of 'minivans' based on the U-body platform, which also included the Pontiac Trans Sport and Oldsmobile Silhouette. Production Production Period: 1990-1996 (Lumina APV) Manufacturing Location: Tarrytown, New York, USA (GM's Tarrytown facility)