GM 6.2L EcoTec3 L86 V-8

6.2L V-8 Engine Specifications & Information

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 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 traffic 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


Generation V small block V-8


GMC Sierra 1500

2014 - current

Chevrolet Silverado 1500

2014 - current

GMC Yukon Denali

2014 - current

Cadillac Escalade

2014 - current

Assembly Plant(s):

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

RPO Code:

L86 (vin code "J")


376 CID, 6.2 liters

Cylinder Head Material:

Cast aluminum

Engine Block Material:

Cast aluminum

Compression Ratio:

11.5 : 1

Firing Order:

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

Cylinder Bore Dia:

4.065 in (103.25 mm)

Cylinder Stroke Len:

3.622 in (92 mm)


Naturally aspirated

Fuel System:

Direct injection, return-less fuel system


Coil-near-plug, 8 individual ignition coils


2 valves per cylinder, OHV, hydraulic roller lifters, variable valve timing (VVT)

Oil Capacity:

8.0 qts w/ filter change

Fuel Requirements:

Premium unleaded fuel, minimum 91 octane

Emissions Equipment:

catalytic converter, positive crankcase ventilation (PCV)

Max Engine Speed:

6,000 RPM

Peak Horsepower:

420 HP @ 5,600 RPM

Peak Torque:

460 lb-ft @ 4,100 RPM

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