Engines

The TrailBlazer came standard with an all-aluminum 4.2L Atlas LL8 inline-six engine that produced up to 203.5 kW (273 hp; 277 PS) and 376 N⋅m (277 lb⋅ft) of torque, or an optional aluminum small-block 5.3L V8 engine producing up to 225 kW (302 hp; 306 PS) and 447 N⋅m (330 lb⋅ft) of torque. The inline-six engine option made the TrailBlazer the most powerful six-cylinder SUV in its class at the time of production.^{[citation needed]} The Active Fuel Management system on the LH6 5.3L V8 engine shuts off four of the eight cylinders during highway travel and idle to conserve fuel. The inline-six versions of the TrailBlazer produce up to 20 miles per US gallon (12 L/100 km; 24 mpg_‑imp) on the highway, according to United States Environmental Protection Agency estimates.

The TrailBlazer won the North American Truck of the Year award in 2002. The 4.2L engine appeared on the Ward's 10 Best Engines list from 2002 to 2005 with innovative features such as DOHC, variable valve timing on the exhaust camshaft, and GM's patented lost-foam casting process.

• 2002–2009 LL8 4.2L I6
• 2003–2004 LM4 5.3L V8
• 2005–2009 LH6 5.3L V8
• 2006–2009 LS2 6.0L V8

Trim levels

Throughout its production run, the TrailBlazer was available in several different trim levels.

The LS was the base trim level of the TrailBlazer, and included a plentiful amount of standard equipment, including aluminum-alloy wheels, four-wheel disc brakes, the 4.2L Vortec inline six-cylinder gasoline engine, a four-speed automatic transmission, cloth seating surfaces, a full-size, matching spare tire with black-painted steel spare wheel, an AM/FM stereo with single-disc CD player, a six-speaker audio system, power windows, door locks, and mirrors, keyless entry, a 65/35 split-folding rear bench seat, dual-zone climate control, cruise control, and a Driver's Information Center. Optional features included a combination cassette and single-disc CD player or a six-disc CD player, a power front driver's seat, a security system, satellite radio (later models), and OnStar.

The LT was the mid-level trim of the TrailBlazer, and added further convenience items to the base LS trim, including upgraded aluminum-alloy wheels, a power front driver's seat, a security system, and a leather-wrapped steering wheel. Optional features included a Bose six-speaker premium amplified audio system, a combination cassette and single-disc CD player or a six-disc, in-dash CD changer, luxury leather-trimmed seating surfaces, dual heated front bucket seats, a power front passenger's seat, a driver's memory system for front driver's seat, mirrors, and radio pre-set settings, a power moonroof, a rear DVD entertainment system by Panasonic (newer models), polished aluminum-alloy wheels, OnStar, a touch-screen radio with a GPS navigation system (later models), and a universal garage door opener system with travel note recorder.

The LTZ was the top-of-the-line trim level of the TrailBlazer, and added further luxury features to the already well-equipped LT trim, including a Bose six-speaker premium amplified audio system, a six-disc, in-dash CD changer, luxury leather-trimmed seating surfaces, dual heated front bucket seats, OnStar, a universal garage door opener system with travel note recorder, a power moonroof, and upgraded interior trim. Additional options included polished aluminum-alloy wheels, a touch-screen radio with a GPS navigation system (later models), and a rear DVD entertainment system by Panasonic. This trim was only offered for the 2002 and 2003 model years.

The SS, introduced for the 2006 model year, was the performance-oriented model of the TrailBlazer, and was based on either the LS or LT trim, depending on the equipment package selected (see the specific models above for standard and optional equipment, which is identical to those trim levels). The differences included unique interior trim, unique polished aluminum-alloy wheels, a unique leather-wrapped steering wheel with an "SS" center emblem, "SS" emblems on the polished wheel center caps, "SS" embroidery for both front bucket seats, unique premium cloth or luxury leather-trimmed seating surfaces, and a 6.0L V8 gasoline engine taken from the Chevrolet Corvette (C6).

EXT

The TrailBlazer was also available as a 3-row, 7-passenger EXT version. This vehicle was 410 mm (16 in) longer and had a higher roofline in the rear to allow easier access to the third row of seats. Chevrolet disguised the higher roofline using roof racks. The TrailBlazer EXT platform was given the internal designation GMT370, which was shared with the GMC Envoy XL and Isuzu Ascender LWB; long-wheelbase versions of the Oldsmobile Bravada, Buick Rainier, and Saab 9-7X were never offered.

Production of the EXT model was handled by the Oklahoma City Assembly plant in Oklahoma City, Oklahoma. The last TrailBlazer EXT rolled off the assembly line on February 20, 2006, because GM had reportedly closed that plant, making 2006 the final year for the TrailBlazer EXT.

The EXT could be identified by its much straighter rear doors, which do not extend into the rear wheel arches.

SS

An SS model was introduced for the 2006 model year. This was the first time a production SUV wore the Super Sport badge, which was first introduced with the 1961 Impala.^[6] The TrailBlazer SS came standard with a 6.0L LS2 V8 engine which produced up to 395 bhp and 400 lb-ft (540 nm) of torque, the same standard engine as the 2005–2007 C6 Corvette, except with different exhaust (more restrictive) and a taller intake manifold to better use the engine's torque characteristics in the much heavier body. The suspension was stiffened and lowered from the factory, with an air-leveling system in the rear, and rode on 20 in (510 mm) wheels wearing 255 mm (10.0 in) wide tires—all which contributed to much improved handling. The TrailBlazer SS also came with a 4.10 rear axle ratio, improving off-the-line acceleration, and was available in both rear-wheel-drive and all-wheel-drive configurations. About 1.7% of total TrailBlazer production had the SS package (Regular Production Option code B4U).^[7]

Safety

IIHS tests in early 2009 gave early TrailBlazers an Acceptable^[8] overall rating in the frontal offset test, while 2005–2009 models received an Acceptable rating. For 2008 models, side-curtain airbags became standard. At that time, the TrailBlazer received a Marginal overall side impact rating, tested with optional side airbags present. Torso-type side airbags were not available then.^{[9][needs update]}

2007 National Highway Traffic Safety Administration (NHTSA) Crash Test Ratings:^[10]

• Frontal Driver:
• Frontal Passenger:
• Side Driver:
• Side Rear Passenger:
• Rollover 2wd:
• Rollover 4wd:

Yearly American sales

Discontinuation

The next-generation TrailBlazer was to be built on an upgraded version of the current GMT360 platform called the GMT361. It was scheduled to be launched in spring 2007, but in January 2006, GM decided to refresh the current platform under the code GMT360NG. However, in June 2006, GM announced that the GMT360NG platform had been cancelled because of high development costs. GM decided to keep the current TrailBlazer until the 2009 model year (2008 in Mexico).

Buick instead had the Enclave, a GM Lambda platform–based crossover SUV to replace the Rainier (along with the Rendezvous and the Terraza minivan), while GMC had the GM Theta platform–based crossover SUV Terrain to replace the Envoy. Saab replaced the 9-7X with the Cadillac SRX–based 9-4X, which was discontinued only nine months after its introduction as a result of Saab's bankruptcy.

The TrailBlazer was replaced by the Traverse in 2009. GM had closed the Moraine plant on December 23, 2008, ending production of all GMT360 products.^[15] The last TrailBlazer rolled off the Moraine line on December 16, 2008, a week before the plant's closure. The closing of the last factory that manufactured the SUVs was the subject of a 2009 HBO documentary The Last Truck: Closing of a GM Plant.^[16]

Recall

In 2012, General Motors and Isuzu recalled more than 258,000 SUVs in the U.S. and Canada to fix short-circuits in power window and door lock switches that could cause fires. The recall covered TrailBlazer, Envoy, Rainier, Ascender, and 9-7X SUVs from the 2006 and 2007 model years. The SUVs were sold or registered in 20 U.S. states, Washington, D.C., and Canada, where salt and other chemicals are used to clear roads in the winter.^[17]

Engines

The second generation Trailblazer comes with three engine options, two of them are diesels, one featuring a Duramax 2.5 L that produces 110–132.5 kW (148–178 hp; 150–180 PS) and 350–440 N⋅m (260–320 lb⋅ft) of torque as standard, and an optional Duramax 2.8 L that produces 132.5–147 kW (178–197 hp; 180–200 PS) and 470–500 N⋅m (350–370 lb⋅ft) of torque. For the Brazilian, South African, and Middle Eastern markets, the 3.6 L V6 gasoline engine option that produces 178 kW (239 hp; 242 PS) (in the Brazilian market, the 2015 version producing 208 kW (279 hp; 283 PS)) and 360 N⋅m (270 lb⋅ft) of torque is also available.

The 2.8 L diesel engine have several new parts, namely a water-cooled variable-geometry turbocharger, high-pressure common-rail fuel delivery system, exhaust gas recirculation (EGR) system, intake manifold, cylinder head, cylinder block, balance shaft unit, and Engine Control Module (ECM).^[23]

Holden Colorado 7/Trailblazer

Holden Colorado 7

Holden Trailblazer (facelift)

The Trailblazer was sold in Australia since 2012 as the Holden Colorado 7. The range consists of two trim levels; LT and LTZ. Standard equipment for all Colorado 7s includes cruise control, body-colored bumpers, side steps, front fog lights, aluminum roof rails, rear parking sensors (in addition to the rear camera), Bluetooth phone connectivity, USB input, roof mounted climate control vents for second and third rows, and a leather-wrapped steering wheel with multifunction controls. The LTZ adds 18-inch wheels, projector headlights, exterior chrome highlights, leather seats, a premium sounds system, a six-way adjustable driver's seat, higher grade interior trim elements, and LED tail-lights.^[20] The Colorado 7 is powered by the same VM Motori 2.8 L turbo-diesel engine as the Colorado.

At its first model update in 2016, the Colorado 7 was renamed to Trailblazer.^[24]

Sales