The 3.7-liter General Motors LLR engine was assembled at a plant in America from 2006 to 2012 and installed on GMT345 / 355 platform models such as the Chevrolet Colorado and Hummer H3. This inline 5-cylinder engine is distinguished by enviable reliability, but its consumption is high.
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
- This is a completely reliable and resource unit, but its consumption is not the smallest.
- At high mileage, valve seat wear and chain stretch are common.
- Many complaints are related to the low resource of the water pump and viscous fan coupling.
- It is important to monitor their condition, as aluminum motors do not tolerate overheating.
- And here the rear crankshaft oil seal often flows and the exhaust manifold bursts.
Frequently asked questions about the GM LLR
How much power does the GM LLR make?
The GM LLR develops 242 hp and 328 Nm of torque.
How much oil does the GM LLR take and which one?
Engine oil capacity: 5.7 liters. Recommended oil: 5W-30.
Does the GM LLR have a timing belt or chain?
The GM LLR uses a timing chain.
Is the GM LLR turbocharged?
No, the GM LLR is naturally aspirated.
Does the GM LLR need valve clearance adjustment?
No, the GM LLR has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the GM LLR last?
The typical lifespan of the GM LLR is ~400 000 km with proper maintenance.
What is the fuel consumption of the GM LLR?
Hummer H3 2007: city 15.7, highway 12.4, combined 13.8 L/100 km.
What cars was the GM LLR installed on?
Chevrolet Colorado 1 (GMT355) in 2006 - 2012; GMC Canyon 1 (GMT355) in 2006 - 2012; Hummer H3 (GMT345) in 2006 - 2010.
What are the common problems of the GM LLR?
This is a completely reliable and resource unit, but its consumption is not the smallest. At high mileage, valve seat wear and chain stretch are common. All known problems.
