OEM Workshop Manual: 2012-2016 Buick LaCrosse Repair Manual (2nd Generation)
This is the original OEM workshop manual for the 2012-2016 Buick LaCrosse (2nd Generation) repair manual, complete with wiring diagrams in an easy-to-use PDF file format.
Also Called
- Buick Allure (Canada, 2010 only)
- Alpheon (South Korea, 2010–2015)
Related
- Buick Regal
- Cadillac XTS
- Chevrolet Impala
- Opel Insignia
- Roewe 950 (China, 2012–present)
- Saab 9-5
| File Format |
PDF |
| File Language |
English |
| You’ll Get |
161.2 MB |
| Page Count |
12,589 |
| Wiring Diagram |
Included |
| Delivery Method |
Instant Download |
Engines Covered
Key Features
- Official Resource: The same manual trusted by certified Buick dealer mechanics and technicians.
- Comprehensive Information: Covers all aspects of service, repair, and maintenance, ensuring nothing is left out.
- Straightforward Procedures: Manufacturer-authorized step-by-step instructions suitable for both professionals and DIYers.
- Wiring Diagrams: Clear, detailed electrical schematics to assist with troubleshooting and repairs.
What’s Inside
- Maintenance Guidelines: Regular servicing procedures to keep your LaCrosse running smoothly.
- Repair Instructions: Detailed steps for mechanical and electrical repairs, from basic fixes to advanced diagnostics.
- Illustrated Content: Visual diagrams and exploded views to aid understanding and precision.
- Electrical Support: Complete wiring diagrams for all systems and components.
This fully updated manual provides all the tools and knowledge needed to maintain and repair your Buick LaCrosse with confidence. Whether you’re tackling simple maintenance or major repairs, this resource is invaluable.
Download your copy now and take control of your vehicle’s performance and reliability!
This manual provides detailed procedures for maintenance, disassembly, reassembly, inspection, adjustment of components, and diagnostics, serving as a guide for experienced mechanics. Please review and utilize this manual thoroughly to ensure complete and accurate repairs, keeping your vehicle in optimal condition.
Before purchasing this manual, check if your vehicle is subject to a GM service recall so your local dealer can repair it free of charge. When replacing parts during repairs, always use genuine Buick OEM spare parts to maintain quality and performance.
Table of Contents : 2012-2016 Buick LaCrosse Repair Manual
SAMPLE PAGES
Caution: This OEM service and workshop repair manual provides detailed procedures for maintenance, disassembly, reassembly, inspection, adjustment, and diagnostics. It is intended as a comprehensive guide for experienced mechanics. To ensure thorough and accurate repairs that maintain your vehicle’s optimal performance, please read and follow this manual carefully. When replacing parts during any repair work, always use genuine Buick parts to ensure quality, safety, and reliability.
🔧 Common Issues with the 2012-2016 Buick LaCrosse
The 2012-2016 Buick LaCrosse (2nd Generation) is a full-size luxury sedan offering smooth performance, a spacious interior, and premium features. It was positioned as a refined alternative to mainstream sedans like the Toyota Avalon and Ford Taurus, competing with entry-level luxury models like the Acura TL and Lexus ES. However, the LaCrosse has some common reliability issues, particularly with its transmission, electronic systems, and engine components.
Despite Buick’s reputation for comfort and durability, the LaCrosse has a few known issues, mainly related to its powertrain and electrical system.
1. Transmission Issues (6-Speed Automatic)
-
- Issue: The 6-speed automatic transmission may experience harsh shifting, hesitation, or delayed acceleration.
- Symptoms:
- Slipping gears, rough gear shifts.
- Transmission hesitation or delayed response.
- Transmission warning light.
- Solution:
- Change transmission fluid every 50,000 miles.
- Software updates may improve shift performance.
- If symptoms persist, a valve body replacement or transmission rebuild may be required.
2. Timing Chain Wear (3.6L V6 Models)
-
- Issue: The 3.6L V6 (LFX) engine can suffer from timing chain stretch, leading to engine performance issues.
- Symptoms:
- Check engine light (P0017 or P0008 codes).
- Rough idling or misfires.
- Loss of power or poor fuel economy.
- Solution:
- Change oil every 5,000-7,500 miles to prevent sludge buildup.
- If symptoms persist, replace the timing chain and tensioners.
3. Oil Consumption & PCV System Issues
-
- Issue: Some 3.6L V6 engines consume excessive oil due to PCV (Positive Crankcase Ventilation) system problems.
- Symptoms:
- Frequent low oil levels between oil changes.
- Burning oil smell from the engine bay.
- Solution:
- Check oil levels every 1,000 miles.
- Replace PCV valve or install an oil catch can.
4. Electronic Power Steering (EPS) Failure
-
- Issue: Some LaCrosse models experience intermittent power steering loss due to EPS module failure.
- Symptoms:
- Heavy steering effort at low speeds.
- Intermittent or sudden loss of power steering assist.
- Solution:
- Inspect and replace the EPS motor or control module if necessary.
5. Dead Battery & Electrical System Failures
-
- Issue: Many owners report random battery drain, infotainment issues, and electrical malfunctions.
- Symptoms:
- Battery dies overnight.
- Infotainment system glitches (freezing, screen blackouts).
- Random warning lights (ABS, traction control, check engine light).
- Solution:
- Check for parasitic battery drain (faulty door modules, OnStar system).
- Update infotainment system software.
- Replace battery every 3-4 years.
6. Air Conditioning (A/C) Compressor Failure
-
- Issue: The A/C system may fail to blow cold air due to a faulty compressor.
- Symptoms:
- Weak airflow from vents.
- No cold air even when A/C is on.
- Solution:
- Recharge A/C refrigerant if low.
- Replace A/C compressor if it fails.
7. Front Suspension & Strut Issues
-
- Issue: The front struts and control arm bushings tend to wear out prematurely.
- Symptoms:
- Clunking noises over bumps.
- Vibration or pulling to one side when driving.
- Solution:
- Replace worn-out front struts and bushings.
🛠️ Maintenance Schedule for the 2012-2016 Buick LaCrosse
Proper maintenance is essential for avoiding expensive engine and transmission repairs.
| Maintenance Item |
Interval (Miles) |
Interval (Km) |
| Oil Change (Synthetic 5W-30) |
Every 5,000-7,500 |
8,000-12,000 |
| Transmission Fluid Change |
Every 50,000 |
80,000 |
| Brake Fluid Replacement |
Every 30,000 |
48,000 |
| Coolant Flush |
Every 50,000 |
80,000 |
| Spark Plug Replacement |
Every 100,000 |
160,000 |
| Air Filter Replacement |
Every 15,000 |
24,000 |
| Cabin Air Filter Replacement |
Every 15,000 |
24,000 |
| Timing Chain Inspection |
Every 100,000 |
160,000 |
| Power Steering Fluid Check (if applicable) |
Every 40,000 |
64,000 |
| Suspension Inspection (Struts, Bushings, Bearings) |
Every 30,000 |
48,000 |
⚡ Performance Specs
| Specification |
2012-2016 Buick LaCrosse |
| Engine Options |
2.4L I4 (Mild Hybrid) / 3.6L V6 |
| Horsepower |
182 hp (I4) / 303 hp (V6) |
| Torque |
172 lb-ft (I4) / 264 lb-ft (V6) |
| Transmission |
6-speed Automatic |
| Drivetrain |
FWD or AWD (V6 Models) |
| Fuel Economy (MPG) |
21 city / 31 highway (I4) / 17 city / 26 highway (V6) |
| Cargo Space |
13.3 cu ft (trunk space) |
✅ Pros & ❌ Cons of the 2012-2016 Buick LaCrosse
✅ Pros
✔ Comfortable & Quiet Ride – Smooth suspension and sound insulation.
✔ Spacious & Luxurious Interior – High-quality materials with premium features.
✔ Available All-Wheel Drive (AWD) – Helps in snowy or wet conditions.
✔ Strong V6 Performance – The 3.6L V6 offers 303 horsepower.
✔ Good Safety Ratings – Standard ABS, traction control, and multiple airbags.
❌ Cons
❌ Transmission Issues – Delayed shifting if fluid isn’t changed regularly.
❌ Timing Chain Wear (V6 Models) – Expensive repair if neglected.
❌ Electronic Failures – Battery drain and infotainment glitches.
❌ Poor Rear Visibility – Small rear window makes parking difficult.
❌ Tight Trunk Space – Only 13.3 cu ft due to battery placement in mild hybrid models.
🏆 6 Competitors to the 2012-2016 Buick LaCrosse
| Competitor |
Pros |
Cons |
| Toyota Avalon (2013-2016) |
More reliable, better resale value |
Less premium interior materials |
| Honda Accord V6 (2013-2017) |
Sportier, better fuel economy |
Less luxury than LaCrosse |
| Ford Taurus (2013-2019) |
Strong performance, large interior |
Heavier, worse fuel economy |
| Chrysler 300 (2012-2016) |
Bold styling, powerful V6/RWD |
Higher fuel consumption |
| Lexus ES 350 (2013-2016) |
Best reliability, luxury interior |
More expensive |
| Acura TLX (2015-2020) |
Sportier handling, AWD option |
Less rear seat space |
📌 Final Verdict: Is the 2012-2016 Buick LaCrosse Worth It?
The 2012-2016 Buick LaCrosse is a comfortable, well-equipped luxury sedan, but requires proper maintenance to avoid timing chain and transmission issues.
Best For:
✔ Buyers seeking a smooth, quiet ride with premium features.
✔ Drivers who maintain their vehicles properly.
Not Ideal For:
❌ People who want long-term reliability (Toyota Avalon is better).
❌ Those needing a large trunk or sporty handling.
👉 Verdict: A great luxury sedan for comfort, but requires strict maintenance to avoid costly repairs. 🚗💨
