The GM LKN is a 1,498 cc, turbocharged inline-three petrol engine produced from 2023 onwards. It features dual overhead camshafts (DOHC), direct fuel injection, and an integrated exhaust manifold within the cylinder head. Peak output is rated at 110 kW (148 PS) and 240 Nm of torque, providing responsive performance with an emphasis on urban efficiency.
Fitted primarily to the Chevrolet Trax and Buick Envista, the LKN was engineered for agile, everyday driving with strong low-end torque. Its character prioritizes smooth power delivery and quiet operation. Emissions compliance is achieved through its gasoline particulate filter (GPF) and three-way catalytic converter, meeting stringent Euro 6d and U.S. Tier 3 Bin 30 standards.
One documented engineering focus is managing long-term durability of the high-pressure fuel system under variable fuel quality conditions, addressed in GM Service Bulletin #23-NA-115. This bulletin outlines revised fuel pump calibration and updated maintenance intervals for vehicles operating in markets with inconsistent fuel standards to ensure injector longevity and consistent performance.
Production years 2023–Present meet Euro 6d and U.S. Tier 3 Bin 30 standards (EPA Certificate of Conformity #A-23-007).
The GM LKN is a 1,498 cc inline-three turbocharged petrol engine engineered for subcompact SUVs (2023-Present). It combines direct injection with a single-scroll turbocharger to deliver strong low-end torque and agile performance. Designed to meet Euro 6d and U.S. Tier 3 Bin 30 standards, it balances efficiency with responsive power.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,498 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-3, DOHC, 12-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 74.0 mm × 87.5 mm | |
| Power output | 110 kW (148 PS) @ 5,600 rpm | |
| Torque | 240 Nm @ 2,000–4,000 rpm | |
| Fuel system | Direct Injection (SIDI) with GPF | |
| Emissions standard | Euro 6d / U.S. Tier 3 Bin 30 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single-scroll, integrated exhaust manifold | |
| Timing system | Chain-driven | |
| Oil type | dexos1™ Gen 3 (SAE 5W-30) | |
| Dry weight | 104 kg |
The turbocharged design provides strong low-RPM torque ideal for city driving but requires strict adherence to 12,000 km or 12-month oil changes using dexos1™ Gen 3 oil to protect the turbocharger bearings and timing chain. The direct injection system with GPF necessitates the use of Top Tier or equivalent high-detergent fuel to prevent injector fouling. Revised high-pressure fuel pump calibration per GM SIB #23-NA-115 is recommended for vehicles in regions with variable fuel quality to ensure long-term reliability and consistent injector spray patterns.
Oil Specs: Requires GM dexos1™ Gen 3 specification (GM Service Manual SI-10567). This is a mandatory requirement, not a recommendation.
Emissions: Certified to Euro 6d and U.S. Tier 3 Bin 30 standards (EPA Certificate of Conformity #A-23-007). Applies to all model years 2023–Present.
Power Ratings: Measured under SAE J1349 standards. Peak output requires 87 AKI (RON 91) or higher fuel (GM Owner's Manual).
GM Technical Information System (TIS): Docs SI-10567, #23-I3-001, #23-NA-115
GM Electronic Parts Catalog (EPC): Doc. ENG-9567
U.S. Environmental Protection Agency (EPA) Certificate Database (A-23-007)
SAE International: J1349 Engine Power Certification Standards
The GM LKN was used across GM's VSS-F platform SUVs with transverse mounting and no external licensing. This engine received platform-specific adaptations-unique engine mounts and ECU calibrations for the Trax versus the Envista-creating minor service part differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code 'LKN' stamped on a machined pad on the front of the engine block, near the accessory drive (GM TIS Doc. ENG-ID-018). The 8th digit of the VIN is 'K' for vehicles equipped with this engine. Visually, it can be identified by its compact, three-cylinder layout and the 'ECOTEC' badge on the engine cover. Critical differentiation from the LBR: The LKN may have a different ECU calibration and turbocharger wastegate actuator. Service parts like the turbocharger and intake manifold are specific to the application and are not interchangeable without ECU reprogramming (GM SIB #24-INT-009).
The LKN's primary documented service focus is potential fuel system sensitivity in markets with variable fuel quality, with elevated incidence under low-speed, high-idle conditions. GM internal data from 2023 indicated a subset of engines required pump calibration updates, while NHTSA data shows no significant safety recalls. Adherence to the revised service procedure is critical for preventative maintenance.
Analysis derived from GM technical bulletins (2023-2024) and NHTSA recall data (2023-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GM LKN.
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