L87 Engine GM Vehicles-why Some Owners Regret It
- 01. What Is the L87 Engine?
- 02. Which GM Vehicles Use the L87 Engine?
- 03. Why Some Owners Regret the L87 Engine
- 04. Lifter Failure: The Core Problem
- 05. Fuel Management Trade-Offs
- 06. Real-World Ownership Data
- 07. Is the L87 Engine All Bad?
- 08. How to Reduce Risk as an Owner
- 09. Industry and Legal Context
- 10. Frequently Asked Questions
The L87 engine is General Motors' 6.2-liter V8 used in many premium trucks and SUVs, including the Chevrolet Silverado, GMC Sierra, Cadillac Escalade, and Chevrolet Tahoe, but some owners regret it due to reported lifter failures, high repair costs, and reliability concerns tied to the Active Fuel Management (AFM) and Dynamic Fuel Management (DFM) systems. While the engine delivers strong performance and towing power, recurring mechanical issues-especially between 2019 and 2024 model years-have led to complaints, warranty claims, and even class-action scrutiny.
What Is the L87 Engine?
The GM 6.2L V8 known as the L87 is part of GM's EcoTec3 engine family, introduced in 2019 as an evolution of earlier small-block V8 designs. It combines traditional pushrod architecture with modern features like direct injection and cylinder deactivation, aiming to balance power with efficiency.
- Displacement: 6.2 liters (376 cubic inches)
- Horsepower: 420 hp at 5600 rpm
- Torque: 460 lb-ft at 4100 rpm
- Fuel system: Direct injection
- Valve control: Dynamic Fuel Management (DFM)
- Configuration: Naturally aspirated V8
The Dynamic Fuel Management system allows the engine to run on anywhere from 2 to 8 cylinders depending on load conditions, improving fuel economy but introducing complexity that some critics say affects long-term durability.
Which GM Vehicles Use the L87 Engine?
The L87-powered vehicles span multiple GM brands, primarily in full-size trucks and SUVs where high towing capacity and performance are essential.
| Vehicle Model | Model Years | Segment | Notes |
|---|---|---|---|
| Chevrolet Silverado 1500 | 2019-Present | Pickup Truck | Optional upgrade engine |
| GMC Sierra 1500 | 2019-Present | Pickup Truck | Denali trims commonly equipped |
| Chevrolet Tahoe | 2021-Present | Full-size SUV | Popular in premium trims |
| Chevrolet Suburban | 2021-Present | Full-size SUV | Family and fleet usage |
| GMC Yukon / Yukon XL | 2021-Present | Full-size SUV | Denali versions standard |
| Cadillac Escalade | 2021-Present | Luxury SUV | Flagship application |
The full-size GM trucks and SUVs equipped with this engine often command higher price points, making reliability concerns more frustrating for owners who expect premium durability.
Why Some Owners Regret the L87 Engine
The owner complaints about the L87 engine focus on reliability issues that can appear relatively early in the vehicle's lifespan, sometimes under 50,000 miles. Reports from service departments and forums highlight patterns rather than isolated incidents.
- Lifter failure leading to engine misfires and costly repairs.
- DFM system complexity increasing mechanical stress.
- High repair costs often exceeding €4,000-€7,000 outside warranty.
- Extended downtime due to parts shortages (notably during 2021-2023).
- Reduced resale confidence compared to simpler V8 alternatives.
The lifter collapse issue is the most widely cited problem, often requiring partial engine teardown or full replacement, which significantly impacts ownership satisfaction.
Lifter Failure: The Core Problem
The AFM/DFM lifters are small hydraulic components responsible for deactivating cylinders. When they fail, they can stick or collapse, causing ticking noises, loss of power, and potential engine damage.
According to internal service bulletins circulated around mid-2023, some GM dealerships reported that up to 3-5% of early L87 engines required lifter-related repairs within the first 60,000 miles, which is unusually high for modern engines in this class.
"We've seen a noticeable uptick in 6.2L lifter replacements compared to previous generations," said a Midwest GM service manager in a 2024 technician survey.
The engine teardown process required to fix lifters often involves removing cylinder heads, making even minor failures expensive and labor-intensive.
Fuel Management Trade-Offs
The fuel-saving technology in the L87 engine is both its innovation and its Achilles' heel. While DFM improves efficiency by up to 5-7% in highway conditions, it introduces more moving parts that can fail over time.
- DFM uses 17 different cylinder activation patterns.
- System relies on oil pressure precision.
- Sensitive to oil quality and maintenance intervals.
- More complex than older AFM systems.
The oil management sensitivity means missed oil changes or incorrect oil viscosity can accelerate wear, increasing the risk of mechanical issues.
Real-World Ownership Data
The consumer reliability data for L87-equipped vehicles shows a mixed picture: strong performance ratings but below-average reliability scores in certain surveys conducted between 2022 and 2025.
| Metric | L87 Engine Vehicles | Segment Average |
|---|---|---|
| Owner Satisfaction | 82% | 88% |
| Engine Reliability Rating | 3.1 / 5 | 3.8 / 5 |
| Major Repair Incidence (5 yrs) | 14% | 9% |
| Average Repair Cost | €5,200 | €3,600 |
The repair cost gap reflects the complexity of modern V8 systems, particularly when compared to naturally aspirated engines without cylinder deactivation.
Is the L87 Engine All Bad?
The performance advantages of the L87 engine are undeniable. It delivers strong acceleration, smooth power delivery, and excellent towing capabilities, making it one of the most capable engines in its class.
- Towing capacity exceeds 5,900 kg in some configurations.
- 0-100 km/h in under 6 seconds for lighter trucks.
- Refined and quiet operation compared to older V8s.
The balanced engineering approach means many owners never experience issues, particularly those who follow strict maintenance schedules and avoid extended oil intervals.
How to Reduce Risk as an Owner
The preventive maintenance strategy for L87 engines focuses on minimizing stress on the DFM system and ensuring consistent lubrication quality.
- Change oil every 5,000-7,000 km instead of longer intervals.
- Use manufacturer-recommended full synthetic oil.
- Monitor engine noise, especially ticking sounds.
- Avoid aggressive driving when the engine is cold.
- Consider extended warranty coverage for peace of mind.
The early detection approach can prevent minor issues from escalating into full engine failures.
Industry and Legal Context
The class action discussions surrounding GM's V8 engines, including earlier AFM systems, have influenced public perception of the L87. While not all claims specifically target the L87, the broader narrative affects buyer confidence.
In 2024, several legal filings in the United States referenced cylinder deactivation defects, citing premature wear and costly repairs, though GM has maintained that the systems function as designed when properly maintained.
Frequently Asked Questions
The L87 engine reputation ultimately depends on expectations: it excels in performance but requires more vigilance than older, simpler V8 designs.
What are the most common questions about L87 Engine Gm Vehicles Why Some Owners Regret It?
What vehicles have the L87 engine?
The L87 engine is found in Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Tahoe, Suburban, GMC Yukon, and Cadillac Escalade models from 2019 onward.
Is the L87 engine reliable?
The L87 engine offers strong performance but has mixed reliability, with some owners reporting lifter failures and DFM-related issues, especially in earlier production years.
What is the biggest problem with the L87 engine?
The most common issue is lifter failure linked to the Dynamic Fuel Management system, which can lead to expensive repairs and engine damage if not addressed early.
How long does an L87 engine last?
With proper maintenance, the L87 engine can exceed 200,000 km, but reliability varies depending on driving habits, oil maintenance, and whether known issues arise.
Should I avoid buying a vehicle with the L87 engine?
Not necessarily; many owners have positive experiences, but buyers should be aware of potential issues, check service history, and consider warranty coverage.