The GMC Terrain I, specifically the 3.6-liter V6 (301 horsepower) model with all-wheel drive and an automatic transmission, represents GMC’s entry into the increasingly popular compact crossover SUV segment. Produced from 2010 to 2015, this variant occupied a mid-to-upper trim level within the Terrain lineup, offering a more powerful engine option compared to the base 2.4-liter four-cylinder. It aimed to appeal to buyers seeking a blend of family-friendly practicality, comfortable ride quality, and capable all-weather performance. The Terrain I shared its platform with the Chevrolet Equinox and Buick LaCrosse, benefiting from General Motors’ Theta platform engineering.
Technical Specifications
| Brand | GMC |
| Model | Terrain |
| Generation | Terrain I |
| Type (Engine) | 3.6 V6 (301 Hp) AWD Automatic |
| Start of production | 2010 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 14.7 l/100 km (16 US mpg, 19.2 UK mpg, 6.8 km/l) |
| Fuel consumption (extra urban) | 10.2 l/100 km (23.1 US mpg, 27.7 UK mpg, 9.8 km/l) |
| Fuel consumption (combined) | 11.8 l/100 km (19.9 US mpg, 23.9 UK mpg, 8.5 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 6.3 kg/Hp, 158.4 Hp/tonne |
| Weight-to-torque ratio | 5.1 kg/Nm, 194.2 Nm/tonne |
| Power | 301 Hp @ 6950 rpm |
| Power per litre | 84.5 Hp/l |
| Torque | 369 Nm @ 4800 rpm (272.16 lb.-ft. @ 4800 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | LFX |
| Engine displacement | 3564 cm3 (217.49 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC-VVT |
| Engine oil capacity | 5.7 l (6.02 US qt | 5.02 UK qt) |
| Coolant | 10.2 l (10.78 US qt | 8.97 UK qt) |
| Kerb Weight | 1900 kg (4188.78 lbs.) |
| Max. weight | 2404 kg (5299.91 lbs.) |
| Max load | 504 kg (1111.13 lbs.) |
| Trunk (boot) space – minimum | 895 l (31.61 cu. ft.) |
| Fuel tank capacity | 79 l (20.87 US gal | 17.38 UK gal) |
| Length | 4707 mm (185.31 in.) |
| Width | 1849 mm (72.8 in.) |
| Height | 1684 mm (66.3 in.) |
| Wheelbase | 2858 mm (112.52 in.) |
| Front track | 1598 mm (62.91 in.) |
| Rear (Back) track | 1578 mm (62.13 in.) |
| Ride height (ground clearance) | 175 mm (6.89 in.) |
| Drag coefficient (Cd) | 0.34 |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 6 gears, automatic transmission |
| Front suspension | Independent coil spring |
| Rear suspension | Independent coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 225/65 R17 |
| Wheel rims size | 17 |
Powertrain & Engine Architecture
The heart of this Terrain variant is the LFX 3.6-liter V6 engine. This engine is a naturally aspirated, 60-degree V6 featuring direct fuel injection and a double overhead camshaft (DOHC) valvetrain with variable valve timing (VVT). The direct injection system improves fuel efficiency and power output by injecting fuel directly into the combustion chamber. The LFX engine produces 301 horsepower at 6,950 rpm and 272 lb-ft of torque at 4,800 rpm. The engine’s aluminum block contributes to weight savings. Paired with the LFX engine is a six-speed automatic transmission, providing smooth shifts and adequate responsiveness for everyday driving. This transmission was a common offering across several GM vehicles of the era.
Driving Characteristics
The 3.6L V6 Terrain offers a noticeable performance advantage over the base four-cylinder model. Acceleration is brisk, making merging onto highways and passing maneuvers relatively effortless. The automatic transmission is tuned for comfort, with gear changes generally smooth and unobtrusive. While not a sporty SUV, the Terrain provides sufficient power for most driving situations. The all-wheel-drive system enhances traction in inclement weather, providing added confidence on slippery roads. However, the added weight of the V6 and AWD system does impact fuel economy compared to the front-wheel-drive, four-cylinder version. The six-speed automatic transmission’s gear ratios are optimized for fuel efficiency and cruising comfort rather than outright performance.
Equipment & Trim Levels
The 3.6L V6 AWD Terrain typically came standard with features such as air conditioning, power windows and locks, a CD player with auxiliary input, and cruise control. Higher trim levels, such as the SLT, added features like leather upholstery, heated front seats, a power driver’s seat, a premium sound system, and a rearview camera. Optional extras included a navigation system, a sunroof, and remote start. Interior materials were generally of good quality for the price point, with a focus on durability and practicality. The dashboard layout is straightforward and user-friendly.
Chassis & Braking
The Terrain I utilizes an independent coil spring suspension on both the front and rear axles, providing a comfortable ride quality. The front suspension features MacPherson struts, while the rear utilizes a multi-link setup. The all-wheel-drive system employs an automatic-engaging system, seamlessly switching between front-wheel drive and all-wheel drive as needed. Braking duties are handled by ventilated discs on all four wheels, providing adequate stopping power. An anti-lock braking system (ABS) is standard. Stabilizer bars are present on both axles to reduce body roll during cornering.
Market Reception & Comparison
The GMC Terrain I 3.6L V6 AWD was generally well-received by automotive critics. Reviewers praised its spacious interior, comfortable ride, and powerful engine. However, some criticized its fuel economy and somewhat uninspired styling. Compared to competitors like the Honda CR-V and Toyota RAV4, the Terrain offered a more powerful engine option but lagged behind in terms of fuel efficiency and resale value. The 2.4L four-cylinder Terrain offered significantly better fuel economy, but at the expense of performance. The V6 model appealed to buyers who prioritized power and all-weather capability over fuel savings.
Legacy
The LFX 3.6L V6 engine proved to be a relatively reliable powertrain when properly maintained. Common issues include oil leaks and occasional problems with the fuel injectors. The six-speed automatic transmission is also generally reliable, although some owners have reported minor shifting issues. On the used car market, the Terrain I 3.6L V6 AWD represents a relatively affordable option for buyers seeking a spacious and capable crossover SUV. Its robust engine and all-wheel-drive system make it a good choice for those who live in areas with harsh winters or frequently drive on unpaved roads. However, potential buyers should be aware of the potential for higher fuel costs and the importance of regular maintenance.
