The Chevrolet LLW is a 2,997 cc, V6 gasoline engine produced between 2014 and 2019. It features direct fuel injection, dual overhead camshafts (DOHC), and continuously variable valve timing (VVT). In standard tune it delivers 275 hp (205 kW) and 269 lb — ft (365 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 Express, the LLW was engineered for drivers seeki…
Production years 2014–2016 meet U.S. Tier 3 Bin 30 and Euro 6c; 2017–2019 models include updated emissions monitoring (EPA File #EPA-CAFE-LLW-2017).
The Chevrolet LLW is a 2,997 cc V6 gasoline engine engineered for mid-size trucks and vans (2014–2019). It combines direct fuel injection with variable valve timing to deliver responsive low-RPM torque and smooth power delivery. Designed to meet U.S. Tier 3 and Euro 6c emissions standards, it balances performance with real-world efficiency.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,997 cc | |
Fuel type | Gasoline | |
Configuration | 60° V6, DOHC, 24-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 94.0 mm × 71.9 mm | |
Power output | 205 kW (275 hp) @ 6,400 rpm | |
Torque | 365 Nm (269 lb-ft) @ 4,100 rpm | |
Fuel system | Direct injection (DI) | |
Emissions standard | U.S. Tier 3 Bin 30 / Euro 6c | |
Compression ratio | 11.3:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Dual chain-driven (DOHC) | |
Oil type | GM Dexos1 Gen 2 (5W-30) | |
Dry weight | 180 kg (397 lbs) |
The Chevrolet LLW was used across Chevrolet's Mid-Size Truck & Van platforms with longitudinal mounting and utilised in GMC variants under shared GM architecture. This engine received platform-specific calibrations-shorter intake runners in the Express and revised exhaust tuning in the Colorado Z71-and from 2017 the updated Colorado models adopted enhanced timing tensioner design, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The LLW's primary reliability risk is timing chain tensioner wear on early builds, with elevated incidence in stop-start urban use and cold climates. GM internal field reports from 2018 noted a significant number of pre-2017 engines requiring tensioner replacement before 120,000 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 (2014-2019) and US EPA durability reports (2015-2020). Repair procedures should follow manufacturer guidelines.
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The LLW provides smooth performance and good towing capability, but early models (2014-2016) had timing chain tensioner concerns. Later revisions (post-2017) improved component durability, so well-maintained examples can exceed 150,000 miles. Regular servicing and using correct oil (5W-30 GM Dexos1 Gen 2) are essential for longevity.
The most documented issues are timing chain tensioner wear (especially on cold starts), intake carbon buildup from EGR, coolant leaks at the intake manifold, and fuel pump relay failure. These are confirmed in GM service bulletins and field reports from fleet operators.
The LLW was used in Chevrolet Colorado and Canyon (2014-2019), as well as the Express 2500/3500 vans (2015-2019). It was also available in GMC Savana models under GM's shared architecture. All meet U.S. Tier 3 Bin 30 and Euro 6c emissions standards.
Yes, but with limitations. ECU tuning can yield modest gains (~20-30 hp) by optimizing fuel and timing maps. However, the naturally aspirated design and DOHC valvetrain limit high-RPM potential. Supporting mods like headers and exhaust help, but significant power increases require internal upgrades.
Moderate for a V6. In a Colorado, expect ~18 mpg (13.1 L/100km) city and ~25 mpg (9.4 L/100km) highway. Real-world mixed driving typically yields 21-23 mpg (11.2-10.2 L/100km). Fuel economy depends heavily on load, towing, and driving style.
Yes. The LLW is an interference engine. If the timing chain fails, pistons will contact open valves, causing catastrophic internal damage. Timing chain maintenance and using correct oil are critical to prevent failure.
GM specifies 5W-30 synthetic oil meeting GM Dexos1 Gen 2 specification. This oil is critical for timing chain and high-pressure fuel pump protection. Change intervals should not exceed 10,000 miles or one year, whichever comes first, especially in severe service conditions.
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