From 2006 to 2012, the 3.7-liter General Motors LLR engine was assembled at an American facility and fitted to GMT345 and 355 platform vehicles, including the Hummer H3 and Chevrolet Colorado. Although its consumption is high, this inline 5-cylinder engine stands out for its exceptional dependability.
The Atlas family: LLV, LLR, LL8.
Specifications
| Production years | 2006-2012 |
| Displacement, cc | 3653 |
| Fuel system | distributed injection |
| Power output, hp | 242 |
| Torque output, Nm | 328 |
| Cylinder block | aluminum R5 |
| Block head | aluminum 20v |
| Cylinder bore, mm | 95.5 |
| Piston stroke, mm | 102 |
| Compression ratio | 10.0 |
| Features | DOHC |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | at the exhaust |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 5.7 |
| Fuel type | petrol |
| Euro standards | EURO 3 |
| Fuel consumption, L/100 km (for Hummer H3 2007) — city — highway — combined |
15.7 12.4 13.8 |
| Engine lifespan, km | ~400 000 |
| Weight, kg | 191 |
The engine was installed on:
- Chevrolet Colorado 1 (GMT355) in 2006 – 2012;
- GMC Canyon 1 (GMT355) in 2006 – 2012;
- Hummer H3 (GMT345) in 2006 – 2010.
Disadvantages of the GM LLR engine
Although this unit is entirely dependable and resource-rich, its consumption is not the lowest.
Chain stretch and valve seat wear are typical at high mileage.
The low water pump and viscous fan coupling resources are the subject of numerous complaints.
Because aluminum motors cannot withstand overheating, it is crucial to keep an eye on their condition.
Here, the exhaust manifold bursts and the rear crankshaft oil seal frequently leaks.