Market Segment:
Mid-size sedan and coupe, competing in a segment with strong offerings from Ford (Taurus), Honda (Accord), and Toyota (Camry).
Competitive Advantage Of Manual:
Provides vehicle-specific, factory-level repair information, mirroring what dealership technicians use, offering superior accuracy and detail compared to generic repair guides.
Manual Key Features:
Comprehensive A-Z coverage, step-by-step instructions, diagrams, illustrations, wiring schematics, specifications, printable format, vehicle-specific information.
Engine Systems:
Engine mechanical, fuel service specifications, emission control, intake/exhaust/cooling, lube, ignition, starting, charging.
Drivetrain Systems:
Automatic transmission, manual transmission, clutch, transfer/propeller shaft, drive shaft, differential, axle, suspension.
Braking Steering Systems:
Brake control, brake system (hydraulic, disc, drum), parking brake, steering column, power steering.
Electrical Body Systems:
Electrical system, multiplex/CAN communication, supplemental restraint system (airbag), seat belt, engine immobilizer, cruise control, wipers/washer, door locks, meter/audio/visual, horn, windshield/glass/mirror, instrument panel, seats, engine hood/door, exterior/interior trim.
Diagnostic Procedures:
Detailed diagnosis and troubleshooting for all systems, including specific fault codes and symptom-based troubleshooting.
Repair Procedures:
Complete step-by-step instructions for maintenance, servicing, disassembly, repair, and reassembly of all vehicle components.
Wiring Schematics:
Comprehensive wiring diagrams and schematics for all electrical systems.
Depth Of Coverage:
Factory-level technical detail, suitable for professional technicians and experienced DIY mechanics, covering everything from basic maintenance to complex diagnostics and component rebuilds.
File Format Details:
PDF (Portable Document Format), compatible with Adobe Reader, allowing for viewing, searching, and selective printing of pages.
Print Quality:
High-quality printable pages with clear diagrams and illustrations. Images can be enlarged for detailed viewing.
Binding Type:
Digital (PDF) - no physical binding; users print specific pages as needed.
Paper Type:
N/A (Digital format); printable on standard paper.
Engine Options 1991:
2.5L (151 cu in) V6 (LG7), 3.1L (189 cu in) V6 (LHO/LH0).
Horsepower 2.5L V6:
Approximately 140 hp @ 4800 rpm
Torque 2.5L V6:
Approximately 170 lb-ft @ 2000 rpm
Horsepower 3.1L V6:
Approximately 160 hp @ 4800 rpm
Torque 3.1L V6:
Approximately 185 lb-ft @ 2000 rpm
Fuel Delivery:
Throttle Body Injection (TBI) for 2.5L, Multi-Port Fuel Injection (MPFI) for 3.1L.
Ignition Type:
Distributorless Ignition System (DIS) for 2.5L V6, Distributor-based ignition for 3.1L V6 (may vary by specific engine code).
Standard Transmission Type:
3-speed automatic (THM 3T40) for 2.5L V6. 4-speed automatic (4T60-LE) for 3.1L V6.
Optional Transmission Type:
Manual transmission was not a common option for the Lumina in 1991, predominantly automatic.
Transmission Fluid Type:
Dexron-III (or equivalent) automatic transmission fluid.
Safety Ratings 1991:
NHTSA ratings for 1991 vehicles are generally available, but specific Lumina ratings for this year would need to be confirmed via original NHTSA data. Early 1990s vehicles typically did not have the standardized rating system of today.
Active Safety Features:
Front disc brakes, rear drum brakes (ABS was becoming optional on some models, but not standard on all 1991 Luminas).
Passive Safety Features:
Seat belts, reinforced passenger compartment. Supplemental Restraint System (SRS) - driver-side airbag became increasingly common, though may have been optional on certain trims.
Infotainment System 1991:
Basic AM/FM stereo with cassette player. Optional CD player on some higher trims. Analog gauges and controls.
Driver Assistance Features 1991:
Cruise control was a common feature. Anti-lock Braking System (ABS) was an option on some models, particularly those with the 3.1L engine. No advanced electronic driver assistance systems (e.g., traction control, stability control) were standard.
Connectivity Options 1991:
No modern connectivity features such as Bluetooth or USB ports. Communication was primarily through the car's audio system and perhaps an optional cellular phone integration package for very high trims.
Oil Change Interval:
Typically 3,000-5,000 miles or 3-6 months, depending on driving conditions. Refer to manual for exact specifications.
Coolant Flush Interval:
Every 2 years or 30,000 miles, using an appropriate ethylene glycol-based coolant.
Transmission Fluid Change Interval:
Every 30,000-50,000 miles, or as specified in the manual, especially under severe driving conditions.
Engine Oil Spec:
SAE 5W-30 or 10W-30, API Service SG or SH rated (check manual for exact viscosity by temperature).
Coolant Spec:
GM Type II or equivalent (50/50 mix of antifreeze and distilled water).
Brake Fluid Spec:
DOT 3 brake fluid.
Common Issues 1991 Lumina:
Transmission issues (e.g., Torque converter shudder, solenoid failures), radiator leaks, power steering pump leaks, intake manifold gasket leaks (especially on 3.1L engines), and electrical gremlins common to GM vehicles of this era.
Oil Filter Example Part Number:
AC-Delco PF2 or equivalent (e.g., Fram PH3506, Wix 51085 - check for specific engine application).
Spark Plug Recommendation:
Refer to manual for specific plug type and gap for each engine. Typically AC-Delco or equivalent platinum/iridium plugs for extended life. For 2.5L V6, often 3 plugs for DIS. For 3.1L V6, typically 6 plugs.
Chevrolet Brand Positioning:
Chevrolet, as GM's mainstream brand, focused on providing value, reliability, and a range of vehicles for diverse consumer needs.
Lumina Introduction Context:
The Lumina was introduced for the 1990 model year as a replacement for the Chevrolet Celebrity. It was part of GM's W-body platform, which also underpinned the Pontiac Grand Prix, Oldsmobile Cutlass Supreme, and Buick Regal.
Production Locations:
Primarily manufactured at GM's Oshawa Car Plant in Ontario, Canada.
