The Chevrolet LE9 is a 2,695 cc, inline-four turbocharged gasoline engine produced between 2017 and 2022. It features direct and port fuel injection (Dual Injection), dual overhead camshafts (DOHC), and continuously variable valve timing. In standard tune it delivers 250 hp (186 kW) and 260 lb-ft (353 Nm) of torque, offering a balance of responsiveness and efficiency for mid-size truck and crossover applications.
Fitted to models such as the Colorado, Canyon, and Trailblazer, the LE9 was engineered for drivers seeking strong low-end pulling power with improved fuel economy over larger V6 and V8 options. Emissions compliance was achieved through a close-coupled catalytic converter and advanced combustion tuning, allowing the engine to meet U.S. Tier 3 Bin 30 and Euro 6d-FINAL standards across global markets.
One documented concern is premature turbocharger wastegate actuator binding, which can lead to overboost or limp-mode conditions. This issue, highlighted in GM Service Information Bulletin 18-NA-004, is often linked to carbon buildup and thermal stress in high-load operation. In 2019, Chevrolet introduced a revised actuator design with improved sealing and heat resistance, reducing field failure rates.
Production years 2017–2018 meet U.S. Tier 3 Bin 30 and Euro 6c; 2019–2022 models comply with Euro 6d-FINAL and EPA GHG Phase 2 (EPA File #EPA-GHG-2019-LE9).
The Chevrolet LE9 is a 2,695 cc inline-four turbocharged gasoline engine engineered for mid-size trucks and crossovers (2017–2022). It combines direct and port fuel injection with a twin-scroll turbocharger to deliver responsive low-RPM torque and broad power delivery. Designed to meet U.S. Tier 3 and Euro 6d emissions standards, it balances performance with real-world efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,695 cc | |
| Fuel type | Gasoline | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (twin-scroll) | |
| Bore × stroke | 88.0 mm × 110.0 mm | |
| Power output | 186 kW (250 hp) @ 5,500 rpm | |
| Torque | 353 Nm (260 lb-ft) @ 2,000–4,000 rpm | |
| Fuel system | Dual Injection (direct + port) | |
| Emissions standard | U.S. Tier 3 Bin 30 / Euro 6d-FINAL | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single twin-scroll turbo with electronic wastegate | |
| Timing system | Chain-driven (DOHC) | |
| Oil type | GM Dexos1 Gen 2 (0W-20) | |
| Dry weight | 158 kg (348 lbs) |
The twin-scroll turbo provides strong low-RPM torque ideal for urban driving and light towing but requires strict adherence to 10,000-mile oil change intervals to prevent turbo bearing and timing chain wear. GM Dexos1 Gen 2 (0W-20) oil is critical due to its low-viscosity formulation supporting fuel economy and turbo lubrication. Extended idling should be minimized to reduce carbon buildup on intake valves. The dual injection system reduces carbon deposits but is sensitive to low fuel pressure; ensure pump and filter are maintained. Post-2019 models feature improved wastegate actuator design; pre-2019 units should be inspected for binding per GM SIB 18-NA-004. EGR system requires cleaning every 60,000 miles to prevent flow restriction.
Oil Specs: Requires GM Dexos1 Gen 2 (0W-20) specification (GM SIB 18-NA-004). Replaces previous Dexos1 standards.
Emissions: Euro 6d-FINAL certification applies to 2019+ models (EPA File #EPA-GHG-2019-LE9). U.S. models meet Tier 3 Bin 30.
Power Ratings: Measured under SAE J1349 standards. Output consistent across Colorado, Canyon, and Trailblazer applications (GM PT-2017).
Chevrolet Technical Information System (TIS): Docs C27100, C27045, SIB 18-NA-004
EPA Certification Database (EPA-GHG-2019-LE9)
SAE International: J1349 Engine Power Certification Standards
The Chevrolet LE9 was used across Chevrolet's Mid-Size Truck & SUV platforms with longitudinal mounting and utilised in GMC variants under shared GM architecture. This engine received platform-specific calibrations-shorter intake runners in the Trailblazer and revised exhaust tuning in the Colorado ZR2-and from 2019 the updated Trailblazer models adopted enhanced turbo actuator sealing, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine ID code stamped on the left-side engine block near the cylinder head (Chevrolet TIS C27110). The 8th VIN digit indicates engine type ('L' for LE9 series). Pre-2019 models have a black turbocharger housing with silver actuator; post-2019 units use a revised actuator with improved heat shield. Critical differentiation from LFX: LE9 has a twin-scroll turbo and dual injection system; LFX is naturally aspirated with port injection only. Service parts require model-year verification - turbo actuators for pre-2019 engines are incompatible with later revisions due to internal redesign (GM SIB 18-NA-004).
The LE9's primary reliability risk is turbocharger wastegate actuator binding on early builds, with elevated incidence in towing and hot climates. GM internal field reports from 2020 noted a significant number of pre-2019 engines requiring actuator replacement before 100,000 miles, while US EPA durability records highlight EGR cooler clogging in high-idle fleet vehicles. Frequent short trips and infrequent oil changes increase wear, making oil quality and interval adherence critical.
Analysis derived from GM technical bulletins (2017-2022) and US EPA durability reports (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CHEVROLET LE9-145CUL4.
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