GM 6.2L EcoTec3 L86 V-8

General Motors' 6.2L EcoTec3 is a modern high compression, direct fuel injection V-8 engine found in 2014 to current Chevrolet Silverado 1500 and GMC Sierra 1500 pickup truck models. The engine is rated at a peak 420 horsepower and 460 lb-ft of torque, which are relatively high output ratings for a naturally aspirated engine that displaces a mere 376 cubic inches. Despite its large size, the engine is rated up to 15 city mpg and 21 highway mpg for 2018 model year trucks.

The 6.2L V-8's total output and low end performance are largely the result of the engine's relatively high 11.5 to 1 compression ratio. As a result of this high compression ratio, the engine is required to run on a minimum 91 octane gasoline to avoid detonation/knocking. Chevrolet Silverado and GMC Sierra pickup trucks equipped with the 6.2L V-8 are rated at a maximum 15 city mpg and 21 highway mpg for the 2018 model year; actual EPA estimations will be vary by vehicle configuration and driving conditions.

GM's 6.2L features an active fuel management system commonly referred to industry wide as cylinder deactivation. In order to improve fuel efficiency, the system will deactivate 4 of the 8 cylinders under the appropriate driving conditions. The engine can rapidly transition from 4 and 8 cylinder operation modes.

GM 6.2L EcoTec V-8 Specs


General Motors 6.2L EcoTec3 V-8

RPO Code:


VIN Code:

J (8th digit of VIN)

Assembly Plants:

Tonawanda Engine Plant, Tanawanda, NY
St. Catherines Engine Plant, St. Catherines, Ontario, Canada

Applications/Production Years:

2014 - current GMC Sierra 1500
2014 - current Chevrolet Silverado 1500
2014 - current GMC Yukon
2014 - current Cadillac Escalade


376.05 CID (376 CID nominal), 6.16 liters (6.2 liters nominal)


Generation V small block V-8


4.065 in (103.25 mm)


3.622 in (91.99 mm)

Bore/Stroke Ratio:

1.12 (oversquare)

Compression Ratio:

11.5 : 1

Firing Order:

1 - 8 - 7 - 2 - 6 - 5 - 4 - 3

Engine Block Material:

Cast aluminum

Cylinder Head Material:

Cast aluminum

Fuel System:

Direct injection, returnless fuel system


Naturally aspirated


Coil-near-plug, 8 individual ignition coils


Overhead valve (OHV), 2 valves per cylinder
Standard pushrod V-8
Variable valve timing (VVT)
Hydraulic roller lifters

Engine Oil Capacity:

8.0 qts w/ filter change

Lube Oil Filter P/N:

ACDelco UPF63R


Premium unleaded fuel, minimum 91 octane

Peak Horsepower:

420 hp @ 5,600 rpm

Peak Torque:

460 lb-ft @ 4,100 rpm

Governed Speed:

6,000 rpm

Emissions Equipment:

Catalytic converter, positive crankcase ventilation (PCV)

Engine Dimensions:


29.6 in


25.2 in


32.2 in

GM 6.2L L86 Horsepower and Torque Curves

GM 6.2L V-8 horsepower and torque curve chart

2014 - 2018 GM 6.2L EcoTec3 L86 Horsepower and Torque Curves

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Last update: 12/09/2021

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