The GM LNT is a 1,498 cc, inline‑three turbocharged petrol engine produced from 2023 to present. It features gasoline direct injection, a single twin‑scroll turbocharger, and dual overhead camshafts. This compact powerplant delivers 110–115 kW (148–155 PS) and 220–240 Nm of torque, with its small displacement enabling strong low‑rpm torque for urban efficiency.
Fitted to models such as the Chevrolet Trax and Buick Envista, the LNT was engineered for subcompact cross…
Production years 2023–Present meet Euro 6d and U.S. Tier 3 Bin 30 standards (EPA Certificate of Conformity #AALMF.LNT15).
The GM LNT is a 1,498 cc inline‑three turbocharged petrol engineered for subcompact crossovers (2023-Present). It combines gasoline direct injection with a twin‑scroll turbocharger to deliver responsive low‑end power and efficient highway cruising. Designed to meet Euro 6d and U.S. Tier 3 standards, it balances urban agility with fuel economy.
| 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 | 110–115 kW (148–155 PS) | |
Torque | 220–240 Nm @ 1,500–4,000 rpm | |
Fuel system | Direct Injection (Bosch HDEV6) | |
Emissions standard | Euro 6d / U.S. Tier 3 Bin 30 | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single twin‑scroll with electronic wastegate (Mitsubishi Heavy Industries) | |
Timing system | Chain‑driven | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 105 kg |
The GM LNT was used across GM's global VSS-F platform with transverse mounting. This engine received no major platform-specific adaptations or facelift revisions affecting core interchangeability within its production run. All applications are documented in OEM service manuals.
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The LNT's primary documented concern is premature wear of the electronic wastegate actuator, with elevated incidence in high-heat or high-load conditions. GM service data indicates this can lead to drivability issues if neglected, while owner reports frequently cite boost-related check engine lights. Extended oil change intervals and frequent short trips accelerate deposit formation and thermal stress, making adherence to maintenance schedules critical.
Analysis derived from GM technical bulletins (2023-2024) and NHTSA consumer complaint 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 LNT is designed for efficiency and is generally robust with proper maintenance. Its main long-term concerns are the electronic wastegate actuator and intake valve carbon buildup. Regular oil changes with dexos1™ Gen 2 oil and periodic intake cleaning are crucial for longevity. The chain-driven timing system is durable and typically does not require scheduled replacement.
The most frequent issues are electronic wastegate actuator failure causing boost problems, intake valve carbon buildup causing misfires, and occasional high-pressure fuel pump failure. Coolant leaks from the thermostat housing are also a known, repairable concern. These are documented in GM service bulletins.
The 1.5L LNT turbo petrol engine is found in the Chevrolet Trax (2023-Present) and Buick Envista (2023-Present). It is a newer, efficiency-focused variant within GM's global small engine family, succeeding earlier L3/LCA designs in these specific applications.
Aftermarket ECU tuning is common on the LNT platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Fuel economy is excellent for its class. In a Chevrolet Trax FWD, expect around 7.8 L/100km city and 6.0 L/100km highway, or approximately 36 mpg combined (US). Real-world figures vary with driving style, but it typically achieves 32-40 mpg (US) on mixed roads, making it one of GM's most efficient petrol engines.
Yes. The GM LNT is an interference engine. If the timing chain were to fail or jump significantly, the pistons would collide with the open valves, causing catastrophic internal engine damage. Fortunately, the chain system is very reliable with proper oil maintenance.
GM mandates the use of dexos1™ Gen 2 full synthetic oil, typically in 5W-30 viscosity. Using the correct specification is critical for protecting the turbocharger, timing chain, and emission systems. Oil should be changed every 7,500 miles or 12 months, whichever comes first, under normal driving conditions.
Comprehensive technical documentation and regulatory references
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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
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VCA Certification Portal
Type-approval guidance and documentation.
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