GM L86 6.2L Engine for Sale | EcoTec3 V8 for Silverado, Sierra & Escalade

Looking for a GM L86 6.2L engine for sale? McClain Auto Part offers used OEM GM EcoTec3 V8 engines for compatible Chevrolet Silverado, GMC Sierra, Cadillac Escalade, and selected full-size SUV applications.

The L86 delivers 420 horsepower and 460 lb-ft of torque in its factory configuration. It combines a durable aluminum engine block with direct fuel injection, variable valve timing, and Active Fuel Management (AFM).

Whether you’re replacing a damaged engine or planning a custom truck build, the L86 offers strong factory performance and proven GM engineering.

Our team can help you confirm the correct engine configuration, available mileage, included components, and shipping options before ordering.

GM L86 6.2L Engine Key Features

Engine: GM L86 6.2L EcoTec3 V8

Engine family: Generation V GM small-block

Condition: Used OEM engine assembly

Displacement: 6.2 liters / 376 cubic inches

Horsepower: 420 hp

Torque: 460 lb-ft

Engine block: Cast aluminum

Cylinder heads: Cast aluminum

Fuel system: High-pressure direct injection

Valve timing: Variable valve timing (VVT)

Cylinder deactivation: Active Fuel Management (AFM)

Engine RPO code: L86

Warranty: Advertised six-month limited warranty

Shipping: Nationwide freight delivery available

Location: Cleveland, Ohio

Exact mileage, inspection results, and included accessories vary by engine. Confirm the details of the available unit before purchasing.

What Is the GM L86 6.2L EcoTec3 Engine?

The L86 is a naturally aspirated 6.2-liter V8 from General Motors’ Generation V small-block engine family.

GM introduced the engine for the 2014 model year, offering it in selected full-size pickups. It later appeared in premium SUVs, including the Cadillac Escalade and GMC Yukon Denali.

The L86 was designed to provide substantial horsepower and low-end torque while incorporating modern fuel-saving technology.

Unlike earlier port-injected GM truck engines, the L86 uses direct fuel injection. It also features AFM and variable camshaft timing.

These technologies help the engine balance performance, efficiency, and everyday drivability.

Strong Factory Performance

The L86 produces 420 horsepower and 460 lb-ft of torque in common factory truck and SUV applications.

Its large displacement provides strong acceleration and pulling power. As a result, the engine is well suited to full-size trucks and SUVs.

Actual vehicle performance depends on the transmission, drivetrain, axle ratio, and vehicle weight.

Lightweight Aluminum Construction

The L86 uses an aluminum engine block and cylinder heads.

This construction helps reduce engine weight compared with traditional iron-block V8 designs.

Despite its aluminum construction, the engine incorporates structural features designed for demanding truck applications.

Modern GM Small-Block Technology

The L86 retains a pushrod V8 layout while introducing modern electronic controls.

Its main technologies include:

• Direct fuel injection
• Variable camshaft timing
• Active Fuel Management
• Electronic throttle control
• Coil-near-plug ignition

Together, these systems contribute to the engine’s factory performance and efficiency.

GM L86 6.2L Engine Specifications

Specification	Details
Manufacturer	General Motors
Engine code	L86
Engine family	Gen V EcoTec3
Displacement	6.2L / 376 cubic inches
Configuration	90-degree V8
Engine block	Cast aluminum
Cylinder heads	Cast aluminum
Valvetrain	OHV, 2 valves per cylinder
Total valves	16
Camshafts	Single camshaft in block
Fuel system	Direct injection
Aspiration	Naturally aspirated
Variable valve timing	Camshaft phasing
Cylinder deactivation	Active Fuel Management
Horsepower	420 hp
Torque	460 lb-ft
Compression ratio	11.5:1
Bore	4.06 inches / 103.25 mm
Stroke	3.62 inches / 92 mm
Firing order	1-8-7-2-6-5-4-3
Fuel type	Gasoline

These are factory platform specifications. Confirm the configuration and application of the specific replacement engine.

GM L86 vs. L83: What’s the Difference?

The L86 and L83 both belong to GM’s Generation V EcoTec3 engine family.

However, they differ in displacement, power output, and internal dimensions.

The L83 is a 5.3-liter V8, while the L86 is a larger 6.2-liter engine.

L86 vs. L83 Specifications

Feature	L86 6.2L	L83 5.3L
Displacement	6.2L	5.3L
Horsepower	420 hp	355 hp
Torque	460 lb-ft	383 lb-ft
Bore	103.25 mm	96 mm
Stroke	92 mm	92 mm
Fuel injection	Direct injection	Direct injection
Variable valve timing	Yes	Yes
AFM	Yes	Yes
Engine family	Gen V	Gen V

Both engines share the same approximate stroke. The L86 achieves its larger displacement through a wider cylinder bore.

Although the engines belong to the same family, they should not automatically be considered interchangeable.

Differences in engine calibration, internal components, and vehicle equipment may affect compatibility.

Before purchasing a replacement, confirm your vehicle’s VIN and original engine code.

GM L86 vs. L87: Important Differences

The L87 succeeded the L86 in newer GM truck and SUV applications.

Although both engines displace 6.2 liters and produce similar factory power, their engine-management and cylinder-deactivation systems differ.

The L86 uses Active Fuel Management, while the L87 introduced Dynamic Fuel Management in applicable configurations.

The L87 also incorporates other system updates.

Therefore, an L87 should not automatically be treated as a direct replacement for an L86.

For a factory replacement, match the engine code and verify any application-specific differences.

GM L86 Engine Vehicle Compatibility

The L86 was installed in selected GM trucks and SUVs.

However, availability varied by vehicle, model year, and equipment package.

Common Factory Applications

Vehicle	Relevant Model Years
Chevrolet Silverado 1500 6.2L	2014–2018
GMC Sierra 1500 6.2L	2014–2018
Cadillac Escalade / ESV 6.2L	2015–2020
GMC Yukon Denali 6.2L	2015–2020
GMC Yukon XL Denali 6.2L	2015–2020
Chevrolet Tahoe 6.2L	2018–2020, selected packages
Chevrolet Suburban 6.2L	2019–2020, selected packages

These are general application ranges, not a guarantee that every vehicle within those years used the L86.

Chevrolet Silverado and GMC Sierra

The L86 was available in selected 2014–2018 Silverado and Sierra 1500 configurations.

Examples include certain Silverado LTZ and High Country models, along with Sierra Denali and other appropriately equipped trucks.

However, not every vehicle in those trim levels has a 6.2-liter engine.

Always verify the original engine designation.

Cadillac Escalade and GMC Yukon Denali

The L86 was widely used in 2015–2020 Cadillac Escalade and GMC Yukon Denali applications.

These vehicles are among the most common factory applications for the engine.

Still, replacement assemblies can differ in accessories, oil pans, wiring, and other equipment.

Check the donor application before ordering.

Chevrolet Tahoe and Suburban

The 6.2-liter L86 became available in selected Tahoe configurations beginning with the 2018 model year.

The Suburban received the L86 in selected 2019–2020 configurations, including the RST Performance Package.

Standard 5.3-liter Tahoe and Suburban models require a different replacement engine.

How to Confirm L86 Engine Compatibility

Correct engine identification is essential when purchasing a used GM replacement engine.

Check Your VIN

The VIN can help identify the vehicle’s original engine configuration.

In applicable GM vehicles, the eighth VIN character J identifies the L86 6.2-liter engine.

However, use the complete VIN and relevant vehicle records when confirming fitment.

Check the RPO Code

GM uses Regular Production Option codes to identify factory-installed equipment.

The code L86 identifies the 6.2-liter EcoTec3 engine.

Depending on the model year, RPO information may appear on a vehicle label, through a QR-code label, or in GM vehicle records.

Confirm the Donor Engine

Even when the engine code matches, verify:

Donor vehicle year and model

Original engine configuration

Available engine identification

Wiring and sensor requirements

Oil pan and accessory arrangement

Transmission compatibility

Our team can help review these details before an order is finalized.

Understanding the L86 Direct Injection System

The L86 uses high-pressure direct fuel injection.

Instead of spraying fuel into the intake ports, its injectors deliver fuel directly into the combustion chambers.

This allows the engine-management system to control fuel delivery precisely.

Main Direct Injection Components

The system includes:

Low-pressure fuel supply

Engine-driven high-pressure fuel pump

High-pressure fuel lines

Direct fuel injectors

Fuel pressure sensors

Electronic engine controls

These components work together to deliver fuel at the pressures required by the engine.

Why Direct Injection Condition Matters

The direct injection system is an important part of the L86’s operation.

Problems with fuel pressure, injectors, or related components can affect starting, idle quality, and performance.

When purchasing a used engine, confirm which fuel system components are included and whether testing information is available.

Direct Injection for Engine Swaps

A custom L86 installation requires compatible fuel delivery and engine controls.

Unlike older port-injected LS engines, the L86 needs a suitable high-pressure direct injection system.

Therefore, builders should plan the fuel system and ECU configuration before installation.

Active Fuel Management on the L86

The L86 uses GM’s Active Fuel Management system.

Under suitable driving conditions, AFM can deactivate four cylinders to reduce fuel consumption.

When additional power is required, the engine returns to eight-cylinder operation.

Common AFM Concerns

AFM-related lifter problems are a known concern on some GM V8 applications.

Symptoms may include unusual valvetrain noise, misfires, rough operation, or other mechanical problems.

However, these symptoms can have several causes.

A proper mechanical diagnosis is necessary before identifying an AFM lifter failure.

What to Check Before Buying

When evaluating a used L86, important information includes:

Available service history

Engine oil condition

Reported valvetrain noise

Misfire history

Compression-test results

Available inspection findings

No single external inspection can guarantee the condition of every internal AFM component.

Ask for the available test results and maintenance information for the specific engine.

Can the AFM System Be Deleted?

Aftermarket AFM-delete components exist for certain GM engines.

However, a mechanical conversion can require replacement internal parts and compatible engine calibration.

It may also affect emissions compliance, warranty coverage, and vehicle legality.

Consult a qualified engine specialist before planning modifications.

An AFM delete should not be assumed necessary for every replacement engine.

Used GM L86 Engine Condition and Inspection

When buying a used 6.2 l v8 engine, mechanical condition matters as much as mileage.

The original product description advertises engine inspections and compression testing.

Before purchasing, customers should confirm which checks were completed on the exact available unit.

Compression Testing

Compression testing helps evaluate cylinder sealing.

Technicians compare readings from all eight cylinders to identify significant differences.

However, compression results should be interpreted alongside other available diagnostic information.

Ask for the recorded results and test conditions before ordering.

Visual Inspection

Important inspection points include:

Engine block and cylinder heads

Oil pan and external seals

Intake manifold

Timing cover

Visible oil and coolant leaks

Electrical connectors

Fuel system components

Signs of impact or previous damage

Oil and Coolant Condition

Oil contamination may indicate unusual wear or another mechanical issue.

Likewise, evidence of oil and coolant mixing requires further investigation.

Fluid condition alone does not establish the overall health of an engine.

Camshaft Timing System

The L86 uses a single camshaft with variable timing.

Its camshaft phaser and control components help adjust valve timing during operation.

These parts should not be confused with the independently controlled intake and exhaust camshafts used in some overhead-cam engines.

AFM and Valvetrain Assessment

AFM lifters and other valvetrain components can require additional attention.

Depending on the engine’s condition, meaningful inspection may involve diagnostic testing or partial disassembly.

Contact our team to confirm what inspection documentation is available.

What Comes With the GM L86 6.2L Engine?

Included components depend on the specific engine assembly.

Typical Engine Components

A used L86 engine may include:

Complete long block

Cylinder heads

Valve covers

Intake manifold

Oil pan

Timing cover

Fuel rails and injectors

Attached sensors, where available

Components That Require Confirmation

The following items are not guaranteed unless specifically listed:

High-pressure fuel pump

Engine wiring harness

ECU or PCM

Throttle body

Alternator

Starter motor

Water pump

Air-conditioning compressor

Exhaust manifolds

Engine mounts

Transmission

Flexplate or torque converter

Some engines arrive with additional accessories attached.

Before purchasing, request confirmation of the parts included with the available unit.

GM L86 Engine Swap Applications

The L86 is also used in custom vehicle projects.

Its factory performance makes it attractive for builders who want a modern GM V8 without adding a supercharger or turbocharger.

Potential applications include:

Chevrolet C10 restorations

Square-body Chevrolet trucks

Custom GMC pickup builds

Classic full-size SUVs

Street-performance projects

Restomod vehicles

However, a custom swap requires careful mechanical and electronic planning.

ECU and Wiring

The L86 requires a compatible engine-management system.

Builders must account for direct injection, camshaft timing, electronic throttle control, and related sensors.

A suitable wiring harness and ECU solution are essential.

Transmission Compatibility

Factory transmission applications varied by model year and vehicle.

The L86 was paired with different automatic transmissions, including six-, eight-, and ten-speed units in relevant GM applications.

Therefore, the transmission should be identified by vehicle and model year rather than assuming every L86 uses the same gearbox.

Engine Mounts and Oil Pan

Custom chassis installations may require modified engine mounts and a different oil pan.

Verify the clearance around the steering system, crossmember, front suspension, and exhaust components.

Cooling and Fuel Systems

The radiator, fuel supply, and related systems must support the L86’s requirements.

For custom installations, professional planning helps reduce fitment problems and unexpected expenses.

Nationwide GM L86 Engine Shipping

McClain Auto Part offers engine shipping from Cleveland, Ohio to destinations throughout the United States.

Because the L86 is a heavy engine assembly, freight transportation is generally required.

Shipping Process

The advertised shipping process includes:

1. Confirming the engine and order details.
2. Preparing the assembly for transport.
3. Securing the engine to a suitable freight pallet.
4. Arranging carrier pickup.
5. Providing tracking information after dispatch.

Most orders are advertised as processing within one to three business days after payment confirmation.

Actual processing and delivery times depend on availability, destination, and carrier arrangements.

Request a Shipping Quote

Freight charges depend on the destination and delivery requirements.

Provide your ZIP code and indicate whether the shipment is going to a residential or commercial address.

Additional services, such as liftgate delivery, may affect the final price.

Local pickup may also be available in Cleveland, Ohio, by prior arrangement.

Six-Month GM L86 Engine Warranty

McClain Auto Part advertises a six-month limited warranty on qualifying used engines.

The warranty is intended to cover eligible internal mechanical defects during the coverage period.

Certain conditions may be excluded, including damage related to improper installation, inadequate lubrication, overheating, or unrelated vehicle components.

If a mechanical issue occurs, contact our team with your order details and a description of the problem.

Please review the complete written warranty terms before purchasing.

Why Buy Your L86 Engine From McClain Auto Part?

Buying a used engine requires careful attention to specifications, condition, and compatibility.

At McClain Auto Part, we focus on helping customers understand the engine they are purchasing.

Our purchasing process emphasizes:

OEM engine identification

Vehicle compatibility assistance

Available mileage information

Inspection and condition details

Confirmation of included accessories

Warranty information

Nationwide freight options

Support for replacement and swap applications

Whether you’re replacing a failed Silverado engine or sourcing a V8 for a custom project, our team can help review your requirements.

Frequently Asked Questions

What Is the GM L86 Engine?

The L86 is a 6.2-liter naturally aspirated V8 from GM’s Generation V EcoTec3 engine family.

It produces 420 horsepower and 460 lb-ft of torque in common factory applications.

What Is the Difference Between an L86 and an L83?

The L86 is a 6.2-liter engine producing 420 horsepower.

The L83 is a 5.3-liter engine producing approximately 355 horsepower.

Both use direct injection, VVT, and AFM, but they have different bore dimensions and engine calibrations.

What Is the Difference Between the L86 and L87?

The L87 is a newer 6.2-liter Gen V engine that followed the L86 in later GM applications.

Among their differences are the cylinder-deactivation systems and engine controls.

They should not automatically be treated as direct replacements for one another.

Does the L86 Have Dual Independent VVT?

No. The L86 uses a single camshaft with variable valve timing.

It does not have independently controlled intake and exhaust camshafts.

Does the L86 Have AFM?

Yes. The factory L86 uses Active Fuel Management to deactivate four cylinders under suitable operating conditions.

Will This Engine Fit My Silverado or Sierra?

It may fit selected 2014–2018 Silverado and Sierra 1500 applications originally equipped with the L86.

Provide your VIN and original engine information to confirm the correct configuration.

Will an L86 Fit My Cadillac Escalade?

The L86 was used in 2015–2020 Cadillac Escalade models.

However, verify the engine configuration and application-specific components before ordering.

Does the L86 Fit a Chevrolet Tahoe?

The L86 was available in selected 2018–2020 Tahoe configurations.

It was not the standard engine in every Tahoe during those years.

Will It Fit My Chevrolet Suburban?

The L86 was available in selected 2019–2020 Suburban configurations, including the RST Performance Package.

Confirm the original engine before purchasing.

How Many Miles Are on the Engine?

Mileage depends on the specific unit available.

Contact our team to confirm the exact mileage and any supporting donor vehicle records.

Is the Engine Compression Tested?

The original listing advertises compression testing.

Ask for the available cylinder readings and inspection details for the specific engine before ordering.

Does It Include the Wiring Harness and ECU?

These components are not guaranteed.

Ask our team to confirm whether they are included with the available engine.

Does the L86 Come With a Transmission?

A transmission is not included unless the specific product listing or order confirms one.

Is the L86 Suitable for an Engine Swap?

Yes, with appropriate conversion components and planning.

The direct injection system, electronics, transmission compatibility, mounts, and cooling requirements must all be considered.

How Much Does a Used GM L86 Engine Cost?

Pricing depends on mileage, condition, included accessories, and availability.

Contact McClain Auto Part for the current price and shipping quote.

Does the Engine Include a Warranty?

A six-month limited warranty is advertised for qualifying internal mechanical defects.

Review the complete terms and exclusions before purchasing.

Do You Ship Nationwide?

Yes. McClain Auto Part offers nationwide freight shipping from Cleveland, Ohio.

Delivery arrangements and costs depend on the destination.

Order Your GM L86 6.2L EcoTec3 Engine Today

If you’re searching for a used GM L86 6.2L engine for sale, McClain Auto Part can help you review the available inventory.

Whether you need a replacement for a Chevrolet Silverado, GMC Sierra Denali, Cadillac Escalade, or another compatible vehicle, correct engine identification is essential.

Before ordering, our team can help you confirm:

Engine RPO code and application

Available mileage

Mechanical condition

Compression-test information

AFM and direct injection details

Included components

Warranty terms

Engine price and shipping cost

Visit McClain Auto Part or contact our team to discuss your engine requirements.