The GM LBT is a 1,490 cc, inline‑three turbocharged petrol engine produced from 2023 for global compact SUV applications. It features direct fuel injection, a single — scroll turbocharger, and dual overhead camshafts (DOHC), delivering 118 kW (158 PS) and 240 Nm of torque. Its compact three — cylinder design prioritizes fuel efficiency for urban environments while maintaining responsive acceleration.
Fitted primarily to the Chevrolet Trax and Buick Envista, the LBT w…
All production years (2023–Present) meet Euro 6d and U.S. EPA Tier 3 Bin 30 standards (EPA Certificate of Conformity #A-RMY-23-LBT-001).
The GM LBT is a 1,490 cc inline‑three turbocharged petrol engine engineered for subcompact SUVs (2023-Present). It combines direct fuel injection with a single-scroll turbocharger to deliver responsive low-end torque and efficient highway cruising. Designed to meet global Euro 6d and U.S. Tier 3 standards, it balances performance with low emissions.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,490 cc | |
Fuel type | Petrol (Gasoline) | |
Configuration | Inline‑3, DOHC, 12‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 74.0 mm × 86.6 mm | |
Power output | 118 kW (158 PS) @ 5,500 rpm | |
Torque | 240 Nm @ 2,000–4,000 rpm | |
Fuel system | Direct Injection (200 bar) | |
Emissions standard | Euro 6d / U.S. Tier 3 Bin 30 | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single-scroll (Mitsubishi Heavy Industries) | |
Timing system | Chain-driven | |
Oil type | dexos1™ Gen 3 (SAE 0W-20) | |
Dry weight | 99 kg |
The GM LBT was developed for GM's global BEV2 platform with transverse mounting. This engine features platform-specific adaptations-integrated exhaust manifold within the cylinder head for faster catalyst light-off-and no significant facelift revisions to date, ensuring broad parts interchangeability within its production run. All adaptations are documented in OEM technical bulletins.
The LBT's primary focus area is NVH management, with isolated reports of mount calibration issues in early 2023 builds. GM TSB #PIC-6543 addresses a specific calibration for mounts to optimize refinement. While generally robust, using incorrect oil or fuel can lead to long-term issues with the turbocharger or fuel system, making adherence to specifications critical.
Analysis derived from GM technical service 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 LBT is a modern engine with no widespread, severe reliability issues reported to date. Its main focus is NVH refinement. Long-term reliability depends heavily on using the correct dexos1™ Gen 3 oil and recommended fuel. Early build mounts were addressed via TSB. With proper maintenance, it should prove robust.
The most noted issues are specific engine mount calibration (TSB #PIC-6543 for early 2023), potential for intake valve carbon buildup (a GDI trait), and brief turbo wastegate rattle on cold starts. Oil consumption within GM's specified limits is also a known characteristic.
The LBT 1.5L turbo petrol engine is currently used in the second-generation Chevrolet Trax (2023–Present) and the Buick Envista (2023–Present). It is the standard engine for these global subcompact SUVs across all trim levels.
Yes, the LBT has tuning potential. ECU remaps are available and can safely increase power by 15-25 kW. The engine and turbo appear robust for mild tuning. However, aggressive tuning may accelerate wear on the turbo, fuel system, or internals and void the factory warranty.
Official EPA ratings for the 2024 Chevrolet Trax with FWD are 28 mpg city / 32 mpg highway / 30 mpg combined. Real-world results vary but typically fall within 26-34 mpg combined, depending on driving style and conditions. It offers good efficiency for its performance.
Yes. Like virtually all modern overhead cam engines, the GM LBT is an interference design. If the timing chain fails, the pistons will collide with the open valves, causing catastrophic internal engine damage. Fortunately, chain failures are extremely rare on this new engine.
The LBT requires GM dexos1™ Gen 3 specification oil, typically in 0W-20 viscosity. Using the correct oil is critical for protecting the turbocharger, preventing LSPI, and ensuring long engine life. Always check your owner's manual for the exact specification.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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