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 stron…
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 | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 104 kg |
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.
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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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The GM LKN is designed for efficiency and responsiveness. Its primary long-term consideration is fuel system sensitivity in regions with poor fuel quality, addressed by a factory service bulletin. With regular maintenance using dexos1™ oil and adherence to recommended driving cycles for the GPF, it should provide dependable service.
The most common documented issues are high-pressure fuel pump wear (in areas with poor fuel), GPF clogging from short trips, turbocharger wastegate rattle, and coolant leaks from the integrated water pump housing. These are addressed in GM service bulletins and are generally manageable.
The LKN engine is found in the Chevrolet Trax (all trims) and the Buick Envista (all trims) from the 2024 model year onwards. It is not used in any non-GM vehicles or older model years.
Yes, the LKN can be tuned. An ECU remap can yield modest gains of 10-15 kW by optimizing boost pressure and ignition timing. However, as a small three-cylinder engine, significant power increases are limited by the stock turbocharger and internal components.
Fuel economy is excellent for its class. In a Chevrolet Trax FWD, expect around 8.1 L/100km (city) and 6.5 L/100km (highway), or approximately 33 mpg (US) combined. Real-world figures vary based on driving style and conditions.
Yes. The GM LKN is an interference engine. If the timing chain were to fail (an extremely rare event), the pistons would collide with the open valves, resulting in catastrophic internal engine damage requiring a full rebuild or replacement.
GM mandates the use of dexos1™ Gen 3 full synthetic oil, typically in 5W-30 viscosity. Using the correct specification is non-negotiable for warranty compliance and to ensure the longevity of the turbocharger and variable valve timing system.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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