What kind of engine is in a Trailblazer?
The Trailblazer today uses turbocharged inline-3 engines—specifically 1.2-liter or 1.3-liter EcoTec units—paired with a 9-speed automatic transmission. Older TrailBlazer models used larger V6 or V8 powerplants.
This article explains the engine options across the two main eras of the Trailblazer name: the modern, compact SUV introduced in the 2020s, and the original TrailBlazer lineup from the early 2000s. It highlights how the focus shifted from bigger displacement performance to efficient turbocharged small engines, and what buyers should know when evaluating different model years and trims.
Current Chevrolet Trailblazer engine options
Before listing the engines, note that the modern Trailblazer offers two turbocharged EcoTec inline-3 options, each paired with a nine-speed automatic transmission and available with front- or all-wheel drive depending on the trim.
- 1.2-liter turbocharged inline-3: approximately 137 horsepower and 162 lb-ft of torque.
- 1.3-liter turbocharged inline-3: approximately 155 horsepower and 174 lb-ft of torque.
In practice, these engines are designed to balance daily drivability with fuel efficiency, while the 9-speed automatic and optional all-wheel drive provide versatility for city driving and light off-road duty.
Historic TrailBlazer engines (2002–2009)
Before the modern era, the TrailBlazer nameplate encompassed larger, more traditional GM V8 and inline-6 powertrains. Here are the most notable engine options from that period, which varied by year and trim, including the high-performance SS variant.
- 4.2-liter inline-6 (the early baseline engine for many TrailBlazer models), roughly around 260–275 horsepower depending on year and tuning.
- 5.3-liter V8 (Vortec 5300), typically in the 290–320 horsepower range with torque in the mid-300s of lb-ft, depending on the exact configuration and drivetrain.
- 6.0-liter V8 (used in the TrailBlazer SS and some higher-performance builds), roughly in the 390–400 horsepower range, with substantial torque for strong highway and trail performance.
Horsepower and torque figures in this era varied by model year, emission standards, and whether the vehicle carried all-wheel drive, but the pair of V8 options and the robust inline-6 were the defining engines for the original TrailBlazer lineup.
What to consider when evaluating Trailblazer engines
If you’re shopping, note that the two eras serve different buyers: the modern Trailblazer emphasizes efficiency and city-friendly performance with small turbo I-3 engines, while the early TrailBlazer offered more traditional off-road capability and high-end power via larger displacement V8s. Always verify the exact engine and transmission in the specific year and trim you’re considering, as features and outputs can vary significantly.
Summary
In short, the Trailblazer name covers two distinct approaches to propulsion. The current model uses turbocharged 1.2L or 1.3L inline-3 engines with a 9-speed automatic, focusing on efficiency and practicality. The original TrailBlazer lineup relied on larger displacement engines, including a 4.2L inline-6 and multiple V8s (notably the 5.3L and the high-performance 6.0L in the SS). When assessing a Trailblazer, identify the model year and trim to determine the exact engine configuration and performance characteristics.
Is the Trailblazer a 3-cylinder or 4 cylinder?
Engine, Transmission, and Performance
As with the Encore GX, the Trailblazer comes with one of two turbocharged three-cylinder engines. The standard turbocharged 1.2-liter three-cylinder generates 137 horsepower and 162 pound-feet of torque and is mated to a continuously variable automatic transmission (CVT).
What year to avoid a Chevy Trailblazer?
Years to avoid for the Chevy Trailblazer include 2002-2004, 2006, and 2010-2012, due to common issues like engine, transmission, and electrical problems. 2003 and 2006 were particularly problematic, while more recent models like 2020-2023 and 2025 have reported issues with braking systems, transmissions, and other defects.
First Generation (2002-2009)
- 2002-2004: These years are plagued by engine and transmission problems, electrical issues, and steering problems.
- 2003: Especially problematic due to transmission and engine issues, and early problems with the AC blower resistor and cooling fan clutch.
- 2005: Generally considered one of the better years, with fewer major issues reported.
- 2006: Despite being a "Super Sport" model, it suffered from a high number of problems, including engine, transmission, and electrical issues.
- 2007-2008: Continued to have issues with the cooling fan clutch and electrical systems.
Second Generation (2020-Present)
- 2020-2023: These years have been subject to safety recalls and a number of common issues including electric brake boost failure, sluggish engine performance, and transmission problems.
- 2023: Reported problems include braking system malfunctions, electrical defects, and transmission performance issues.
- 2025: Has reported transmission and engine problems.
What is the most common problem with the Chevy Trailblazer?
The most common problems are with the ignition system, infotainment system, braking system, noise, and vibration.
What are the downsides of the Trailblazer?
But the issues remained—engine, transmission and electrical problems were common, and combined with braking issues, poor fuel level sensors, rear light issues and climate control problems, the Trailblazer saw one of its worst model years.
