The GMC Canyon I Extended Cab, specifically the 3.7-liter V6 4WD Automatic variant, represents GMC’s entry into the mid-size pickup truck market during the late 2000s. Produced from 2007 through 2012, this model year marked the first generation of the Canyon, sharing its platform with the Chevrolet Colorado. Positioned as a more manageable and fuel-efficient alternative to full-size trucks like the Sierra, the Canyon aimed to appeal to buyers needing truck functionality without the bulk or expense. The Extended Cab configuration offered increased passenger space compared to the standard cab, making it a versatile option for both work and family use. This particular 3.7L engine and 4-speed automatic transmission combination served as the base powertrain for the Canyon, offering a balance of affordability and capability.
Technical Specifications
| Brand | GMC |
| Model | Canyon |
| Generation | Canyon I Extended Cab |
| Type (Engine) | 3.7 (242 Hp) 4WD Automatic |
| Start of production | 2007 |
| End of production | 2012 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 4-5 |
| Doors | 4 |
| Fuel consumption (urban) | 13.8 l/100 km (17 US mpg, 20.5 UK mpg) |
| Fuel consumption (extra urban) | 10.2 l/100 km (23.1 US mpg, 27.7 UK mpg) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7.4 kg/Hp |
| Weight-to-torque ratio | 5.5 kg/Nm |
| Power | 242 Hp @ 5600 rpm |
| Torque | 328 Nm @ 2800 rpm (241.92 lb.-ft. @ 2800 rpm) |
| Maximum engine speed | 6300 rpm |
| Engine layout | Front, Transverse |
| Engine Model/Code | LLR |
| Engine displacement | 3654 cm3 (222.98 cu. in.) |
| Number of cylinders | 5 |
| Engine configuration | Inline |
| Cylinder Bore | 95.5 mm (3.76 in.) |
| Piston Stroke | 102 mm (4.02 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC, CVVT |
| Engine oil capacity | 5.7 l (6.02 US qt | 5.02 UK qt) |
| Coolant | 10 l (10.57 US qt | 8.8 UK qt) |
| Kerb Weight | 1793 kg (3952.89 lbs.) |
| Max. weight | 2404 kg (5299.91 lbs.) |
| Max load | 611 kg (1347.02 lbs.) |
| Trunk (boot) space – minimum | 1245 l (43.97 cu. ft.) |
| Fuel tank capacity | 74.2 l (19.6 US gal | 16.32 UK gal) |
| Length | 5260 mm (207.09 in.) |
| Width | 1742 mm (68.58 in.) |
| Height | 1718 mm (67.64 in.) |
| Wheelbase | 3200 mm (125.98 in.) |
| Front track | 1515 mm (59.65 in.) |
| Rear (Back) track | 1520 mm (59.84 in.) |
| Ride height (ground clearance) | 191.4 mm (7.54 in.) |
| Minimum turning circle (turning diameter) | 13.5 m (44.29 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 4 gears, automatic transmission Hydra-Matic |
| Front suspension | Independent coil spring |
| Rear suspension | Leaf spring |
| Front brakes | Ventilated discs |
| Rear brakes | Drum |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 225/70 R15; 235/75 R15 |
| Wheel rims size | 6.5J x 15 |
Powertrain & Engine Architecture
The heart of this Canyon variant is the 3.7-liter LLR inline-five cylinder engine. This engine, a departure from the traditional V6 configuration, was designed to offer a balance of power and efficiency. It features a cast iron block and aluminum cylinder heads, incorporating dual overhead camshafts (DOHC) and Continuously Variable Valve Timing (CVVT) for optimized performance across the rev range. Fuel delivery is managed by a multi-port fuel injection system. The engine produces 242 horsepower at 5600 rpm and 328 lb-ft of torque at 2800 rpm. This power is then channeled through a four-speed Hydra-Matic automatic transmission, known for its durability but considered somewhat dated by contemporary standards. The transmission’s gear ratios are geared towards providing adequate towing capacity and everyday drivability rather than outright acceleration.
Driving Characteristics
The 3.7-liter engine and four-speed automatic combination in the Canyon delivers adequate, but not exhilarating, performance. Acceleration is modest, with a 0-60 mph time estimated around 8-9 seconds. The automatic transmission, while smooth in operation, lacks the responsiveness of more modern transmissions with additional gears. The gear ratios are spaced to prioritize fuel economy and towing capability over quick acceleration. Compared to the optional 2.9L four-cylinder or the more powerful 5.3L V8, this 3.7L engine offers a middle ground. The 2.9L provided better fuel economy but lacked the towing capacity, while the 5.3L offered significantly more power but at the expense of fuel efficiency. The 4WD system provides enhanced traction in inclement weather and off-road conditions, making it a capable all-weather vehicle.
Equipment & Trim Levels
The base Canyon Extended Cab 3.7L 4WD Automatic typically included standard features such as air conditioning, power windows and locks, an AM/FM stereo with CD player, and basic cloth upholstery. Safety features included ABS brakes and front airbags. Optional extras included upgraded audio systems, cruise control, a towing package, and alloy wheels. Higher trim levels, such as the SLE and SLT, added features like leather upholstery, premium audio systems, and additional chrome exterior trim. The Extended Cab configuration provided a small rear seat suitable for occasional passengers, and increased interior storage space compared to the regular cab models.
Chassis & Braking
The Canyon I utilizes a body-on-frame construction, providing a robust and durable platform. The front suspension consists of independent coil springs, while the rear suspension employs leaf springs. This setup is designed to handle the demands of hauling and towing. Braking duties are handled by ventilated discs at the front and drum brakes at the rear. The braking system, while adequate for everyday use, lacked the stopping power of more advanced braking systems found in contemporary vehicles. The steering is rack-and-pinion with hydraulic power assist, providing a reasonably responsive steering feel.
Market Reception & Comparison
The GMC Canyon, and specifically the 3.7L 4WD Automatic variant, received mixed reviews. Critics praised its affordability and practicality, but noted its lack of refinement compared to some competitors. Fuel economy was considered average for its class. Compared to the Chevrolet Colorado, which shared the same platform, the Canyon offered a slightly more upscale interior and exterior styling. The Ford Ranger and Toyota Tacoma were often cited as benchmarks in the mid-size truck segment, offering more refined driving experiences and stronger resale values. However, the Canyon offered a competitive price point and a capable powertrain for buyers seeking a versatile and affordable pickup truck.
Legacy
The 3.7-liter LLR engine, while not known for being a particularly groundbreaking design, proved to be relatively reliable in the Canyon. Common issues include oil leaks and occasional sensor failures, but major engine failures are relatively rare. The four-speed Hydra-Matic transmission is also generally durable, although it can exhibit signs of wear and tear with high mileage. Today, the Canyon I Extended Cab 3.7L 4WD Automatic represents an affordable entry point into the used pickup truck market. Its simplicity and durability make it a practical choice for buyers seeking a workhorse vehicle. While it may not offer the latest technology or features, it remains a capable and reliable truck for those needing a mid-size pickup with four-wheel drive.
