Chevrolet TrailBlazer Engines
Content
This car is a mid-size frame SUV, which is produced by the American concern General Motors. The SUV was developed by the Brazilian branch of the concern and is produced at a factory in Thailand, from where cars are shipped all over the world. Today, the second generation of the SUV is on the assembly line.
The history of the model began in 1999, when an elongated five-door version of the then-produced Chevrolet Blazer SUV was called the TrailBlazer. This experiment turned out to be more than successful, the car was sold in large quantities, commensurate with the parent car. Therefore, in 2002, it was decided to produce the car already as an independent model.
Namely, 2002 can be considered a full-fledged beginning of the history of the Trailblazer model, when the first generation of this model began to be produced.
First generation of the model
The first generation was produced from 2002 to 2009. It was based on the GMT360 platform. The car was not at all cheap and not of very high quality, but at the same time it had rather high sales circulations in the USA. Since the Americans, despite all the shortcomings, are very fond of big cars.
As was customary in the United States at the time, SUVs were equipped with large large-liter naturally aspirated power units ranging from 4,2 to 6 liters.
Second generation machine
The second generation of the machine was released in 2012. Together with the new appearance, the model received a completely new philosophy. Instead of huge gas guzzlers under the hood of the new Trailblazer, relatively compact and economical gasoline and diesel power units, with almost the same power, took their place.
Now the engine volumes of the American SUV were in the range from 2,5 to 3,6 liters.
In 2016, the car went through a planned restyling. True, except for the appearance, the technical part of the change has not been touched.
Actually, this is where you can finish the description of the brief history of the model and proceed to the review of its power units.
First generation engines
As I wrote above, the first generation of the car had large-capacity engines, namely:
- Engine LL8, 4,2 liters;
- Engine LM4 V8, 5,3 liters;
- Engine LS2 V8, 6 liters.
These motors have the following specifications:
| Engine | LL8 | LM4 V8 | LS2 V8 |
|---|---|---|---|
| Number of cylinders | 6 | 8 | 8 |
| Working volume, cm³ | 4157 | 5328 | 5967 |
| Power, hp | 273 | 290 | 395 |
| Torque, N * m | 373 | 441 | 542 |
| Cylinder diameter, mm | 93 | 96 | 103.25 |
| The piston stroke, mm | 102 | 92 | 101.6 |
| Compression ratio | 10.0:1 | 10.5:1 | 10,9:1 |
| Cylinder block material | Aluminum | Aluminum | Aluminum |
| Supply system | Multipoint fuel injection | Sequential multipoint fuel injection | Sequential multipoint fuel injection |
Next, consider these power units in more detail.
LL8 engine
This is the first motor of a large series of Atlas engines, the General Motors concern. It first appeared in 2002 on an Oldsmobile Bravada. Later, these motors began to be installed on such models as the Chevrolet TrailBlazer, GMC Envoy, Isuzu Ascender, Buick Rainier and Saab 9-7.
This power unit is an in-line 6-cylinder gasoline engine with four valves per cylinder. The gas distribution system of this engine is a DOHC model. This system provides for the presence of two camshafts in the upper part of the cylinder head. It also provides for the presence of valves with variable valve timing.
The first engines developed 270 hp. On the Trailblazer, power was slightly raised to 273 hp. A more serious modernization of the power unit was carried out in 2006, when its power was raised to 291 hp. With.
LM4 engine
This power unit belongs, in turn, to the Vortec family. It appeared in 2003 and, in addition to the Chevrolet Trailblazer, was installed on the following models:
- Isuzu Ascend;
- GMC Envoy XL;
- Chevrolet SSR;
- Buick Rainier.
These motors were made according to the V8 scheme and had an overhead camshaft.
LS2 engine
These motors also belong to the Vortec series. This power unit first appeared in 2005 on the legendary Chevrolet Corvette sports car. On the Trailblazer and SAAB 9-7X Aero, these power units got a little later.
In addition, it was these engines that were the main engines for General Motors cars in the famous NASCAR sports series.
In total, these power units were installed on the following models of the General Motors concern:
- Chevrolet Corvette;
- Chevrolet SSR;
- Chevrolet TrailBlazer SS;
- Cadillac CTS V-Series;
- Holden Monaro family;
- Pontiac GTO;
- Vauxhall Monaro VXR;
- Holden Coupe GTO;
- Holden SV6000;
- Holden Clubsport R8, Maloo R8, Senator Signature and GTS;
- Holden Barn;
- Saab 9-7X Aero.
Motors of the second generation Chevrolet TrailBlazer
As mentioned above, along with the second generation of the model, the power units have completely changed. Now Chevrolet TrailBlazer installed:
- Diesel engine XLD25, 2,5 liters;
- Diesel engine LWH, 2,8 liters;
- Petrol engine LY7 V6, 3,6 liters.
These power units have the following specifications:
| Engine | XLD25 | L.W.H. | LY7 V6 |
|---|---|---|---|
| Motor type | Diesel | Diesel | Petrol |
| Number of cylinders | 4 | 4 | 6 |
| Working volume, cm³ | 2499 | 2776 | 3564 |
| Power, hp | 163 | 180 | 255 |
| Torque, N * m | 280 | 470 | 343 |
| Cylinder diameter, mm | 92 | 94 | 94 |
| The piston stroke, mm | 94 | 100 | 85.6 |
| Compression ratio | 16.5:1 | 16.5:1 | 10,2: 1 |
| Cylinder block material | Aluminum | Aluminum | Aluminum |
| Supply system | COMMONRAIL direct injection with turbocharging and air-to-air aftercooling | COMMONRAIL direct injection with turbocharging and air-to-air aftercooling | Sequential multipoint fuel injection |
All these motors are produced and installed on the machines of the General Motors concern to this day and have proven themselves to be reliable and economical power units.
