The GM LNS is a 2,457 cc, inline‑four petrol engine produced between 2013 and 2017. It features dual overhead camshafts (DOHC), variable valve timing (VVT), and direct fuel injection. In standard form it delivered 132 kW (177 PS), with peak torque of 240 Nm, providing smooth, efficient power for compact applications.
Fitted to models such as the Chevrolet Cruze, Buick Verano, and Cadillac ATS, the LNS was engineered for a balance of refinement, fuel economy, and responsive performance. Emissions compliance was achieved through precise direct injection and advanced catalytic converters, meeting stringent Euro 5 standards across its production run.
One documented concern is potential failure of the high-pressure fuel pump (HPFP), which can lead to drivability issues. This issue, highlighted in GM Service Bulletin 14‑06‑01‑001, is often linked to internal wear or contamination. GM recommends inspection and replacement if symptoms arise, using only the latest revised pump assembly.
Production years 2013–2017 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5682).
The GM LNS is a 2,457 cc inline-four petrol engine engineered for compact and premium compact sedans (2013-2017). It combines DOHC with direct injection and variable valve timing to deliver smooth, responsive power and improved fuel efficiency. Designed to meet Euro 5 standards, it represents GM's focus on refined, efficient four-cylinder powertrains.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,457 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 88.0 mm × 101.0 mm | |
| Power output | 132 kW (177 PS) @ 6,200 rpm | |
| Torque | 240 Nm @ 4,900 rpm | |
| Fuel system | SIDI (Spark Ignition Direct Injection) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 11.2:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | GM Dexos1 Gen 2 (SAE 5W-30) | |
| Dry weight | 125 kg |
The high-compression, direct-injection design delivers smooth, linear power but requires strict adherence to 10,000 km oil change intervals using GM Dexos1 Gen 2 to protect the VVT system. The engine is sensitive to fuel quality; use of Top Tier gasoline is recommended to minimize intake valve carbon buildup. The high-pressure fuel pump is a known service item; any drivability issues should prompt immediate diagnosis per GM SIB 14-06-01-001. The ECU is calibrated for 95 RON fuel for optimal performance.
Oil Specs: Requires GM Dexos1 Gen 2 (5W-30) specification (GM SIB 14-06-01-001).
Emissions: Euro 5 certification applies to all 2013–2017 models (VCA Type Approval #VCA/EMS/5682).
Power Ratings: Measured under SAE J1349 standards. Requires 95 RON fuel for rated output (GM Service Manual SI-E1300A).
GM Technical Service Information: Docs SI-E1300A, 14-06-01-001
VCA Type Approval Database (VCA/EMS/5682)
SAE International: J1349 Engine Power Certification Standards
The GM LNS was used across GM's Delta II and Alpha platforms with transverse mounting. This engine received platform-specific adaptations-unique engine mounts for the Cadillac ATS and specific intake manifolds for the Chevrolet Cruze-creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the engine block, near the timing cover (GM Service Manual SI-E1300A). The 8th VIN digit for LNS-equipped vehicles is typically 'S'. The engine can be visually identified by its direct injection fuel rails running along the top of the intake manifold and the “2.5L” badge on the plastic engine cover. Critical differentiation from the LAF 2.4L: LNS has a larger displacement (2.5L vs 2.4L) and unique intake manifold casting. ECU software is specific to model and year.
The LNS's primary reliability consideration is potential failure of the high-pressure fuel pump (HPFP), a documented service item in GM bulletins. While not universal, GM internal data indicated a notable service rate for this component, making prompt diagnosis and replacement with revised parts critical for maintaining drivability.
Analysis derived from GM technical bulletins (2013-2017) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GM LNS.
Comprehensive technical documentation and regulatory references
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GM Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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
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