The GM LKJ is a 1,490 cc, inline‑three turbocharged petrol engine produced from 2017 to present. It features an aluminium block and head, dual overhead camshafts (DOHC), and direct fuel injection. This compact, efficient design delivers surprising power and torque for its size, making it ideal for GM's global small car platforms.
Fitted primarily to the Chevrolet Equinox and GMC Terrain, the LKJ was engineered to provide strong low — end torque and responsive accelerati…
All production years (2017–Present) meet US EPA Tier 3 Bin 70 emissions standards (EPA Engine Family Code GMX-LKJ).
The GM LKJ is a 1,490 cc inline‑three turbocharged petrol engine engineered for compact SUVs (2017-Present). It combines a DOHC valvetrain with direct injection and a turbocharger to deliver strong low-end torque and class-leading fuel efficiency. Designed to meet stringent US EPA Tier 3 Bin 70 standards, it offers a compelling blend of performance and economy for its segment.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,490 cc | |
Fuel type | Petrol | |
Configuration | Inline‑3, DOHC, 12‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 74.0 mm × 86.6 mm | |
Power output | 170 hp (127 kW) | |
Torque | 203 lb-ft (275 Nm) | |
Fuel system | Gasoline direct injection (GDI) | |
Emissions standard | US EPA Tier 3 Bin 70 | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single turbocharger (BorgWarner) | |
Timing system | Chain-driven | |
Oil type | DEXOS1 Gen 2 (SAE 5W-30) | |
Dry weight | approx. 240 lbs (109 kg) |
The GM LKJ was used across GM's compact SUV platforms with transverse mounting. This engine received platform-specific adaptations-different engine mounts and accessory brackets for the Equinox vs. Terrain-and shares its core architecture with the L3A 1.5L turbo. All adaptations are documented in OEM technical bulletins.
The LKJ's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in early production or high-mileage vehicles. GM service data indicated a notable number of pump replacements before 80,000 miles, while common owner reports cite turbocharger wastegate issues as a secondary concern. Infrequent oil changes and use of non-DEXOS oil make turbo wear critical.
Analysis derived from GM technical bulletins (2017-Present) and aggregated owner repair data (2019-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The GM LKJ is generally reliable with proper maintenance. The main concerns are the high-pressure fuel pump (in early units) and potential turbocharger wastegate issues. Regular oil changes with DEXOS1 Gen 2 oil and addressing any fuel system warnings promptly are essential. With these precautions, the engine can easily reach 150,000+ miles.
The most frequent issues are failure of the high-pressure fuel pump, turbocharger wastegate rattle or sticking, carbon buildup on intake valves, and coolant leaks from the water pump or thermostat housing. These are well-documented in GM service literature.
The 1.5L LKJ turbo engine is used in the Chevrolet Equinox (2018-Present) and GMC Terrain (2018-Present). It is the standard engine for these compact SUVs in North America.
Yes, within limits. A simple ECU tune can yield 20-30 additional horsepower and torque. More significant gains require a larger turbocharger and supporting modifications. Its strength is in its strong low-end torque and efficiency.
Fuel economy is excellent for a compact SUV. In a 2020 Chevrolet Equinox FWD, expect around 26 mpg (US) in the city and 31 mpg (US) on the highway. Actual figures vary with driving style and conditions.
Yes. The GM LKJ is an interference engine. If the timing chain were to fail or jump significantly, the pistons and valves will collide, causing severe internal engine damage.
GM mandates the use of DEXOS1 Generation 2 specification oil, typically SAE 5W-30. Using non-DEXOS oil can void the warranty and lead to premature engine wear. Change intervals should not exceed 7,500 miles.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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