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 crossovers prioritizing fuel economy, low emissions, and responsive city driving. Emissions compliance is achieved through advanced engine management and a close‑coupled catalytic converter, meeting stringent global standards including Euro 6d and U.S. Tier 3 Bin 30.
One documented concern is potential for premature wear of the turbocharger’s electronic wastegate actuator, which can lead to boost control issues. This issue, addressed in GM Service Bulletin PIC6521A, is attributed to electrical component sensitivity in high-heat environments. GM has issued revised actuators for affected vehicles.
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 | dexos1™ Gen 2 (SAE 5W‑30) | |
| Dry weight | 105 kg |
The twin-scroll turbo provides immediate throttle response ideal for city traffic but requires adherence to 7,500-mile oil change intervals using dexos1™ Gen 2 oil to protect the turbo bearings and timing chain. The electronic wastegate actuator is susceptible to heat-related wear; symptoms like boost fluctuations warrant inspection per SIB PIC6521A. Due to its direct injection design, periodic intake valve cleaning (every 50,000 miles) is recommended. Coolant should be replaced at 150,000 miles.
Oil Specs: Requires GM dexos1™ Gen 2 specification (GM Owner's Manual). Critical for turbocharger and emission system longevity.
Emissions: Certified to U.S. EPA Tier 3 Bin 30 and Euro 6d standards (EPA Certificate #AALMF.LNT15). Applies to all model years 2023–present.
Power Ratings: Measured under SAE J1349 standards. Peak output requires 91+ octane fuel for optimal performance (GM PT-2023).
GM Technical Information System: Docs GME-2023, PT-2023, SIB PIC6521A
U.S. Environmental Protection Agency: Certificate of Conformity #AALMF.LNT15
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code 'LNT' stamped on the front of the engine block, near the timing cover (GM TIS Doc. 00-00-89-12345). The 8th digit of the VIN is 'L' for this engine family. Visually, it can be identified by its compact 3-cylinder layout and the twin-scroll turbocharger housing on the exhaust manifold. Critical differentiation from the L3/LCA: The LNT has a slightly different bore/stroke and is tuned for efficiency over peak power; the turbocharger features an electronic wastegate actuator. Service parts like the turbo assembly are specific to the LNT and not interchangeable with earlier variants (GM SIB PIC6521A).
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.
Find answers to most commonly asked questions about GM LNT.
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