The 3.6-liter V6 General Motors LLT engine was produced in the US and Canada from 2007 to 2017 and was installed on the Cadillac CTS, STS, as well as Chevrolet Traverse, Buick Enclave and GMC Acadia crossovers. This power unit is essentially a modification of the LY7 engine with direct fuel injection.
High Feature family: L3B, LP9, LF1, LFX, LFY, LGX, LLT, LY7.
Specifications
| Production years | 2007-2017 |
| Displacement, cc | 3564 |
| Fuel system | direct injection |
| Power output, hp | 280 – 315 |
| Torque output, Nm | 350 – 380 |
| Cylinder block | aluminum V6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 94 |
| Piston stroke, mm | 85.6 |
| Compression ratio | 11.3 |
| Features | DOHC |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | Dual VVT |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 5.7 |
| Fuel type | petrol |
| Euro standards | EURO 4/5 |
| Fuel consumption, L/100 km (for Cadillac CTS 2010) — city — highway — combined |
16.6 8.7 11.6 |
| Engine lifespan, km | ~280 000 |
| Weight, kg | 180 |
The engine was installed on:
- Buick Enclave 1 (GMT967) in 2008 – 2017;
- Buick LaCrosse 2 (GMX353) in 2009 – 2011;
- Cadillac CTS II (GMX322) in 2007 – 2011;
- Cadillac STS I (GMX295) in 2007 – 2011;
- Chevrolet Camaro 5 (GMX521) in 2009 – 2011;
- Chevrolet Traverse 1 (GMT561) in 2008 – 2017;
- GMC Acadia 1 (GMT968) in 2008 – 2016;
- Saturn Outlook 1 (GMT966) in 2008 – 2010.
Disadvantages of the GM LLT engine
- This is a completely reliable motor, but its timing chain has a small resource;
- This is especially true for the units of the first years, their chain stretched up to 100,000 km;
- Also, a lot of trouble can be thrown by a capricious direct fuel injection system;
- Like all direct injection engines, it is prone to valve deposits;
- Monitor the condition of the cooling system: radiators are leaking, the pump does not run for long.
Frequently asked questions about the GM LLT
How much power does the GM LLT make?
The GM LLT develops 280 - 315 hp and 350 - 380 Nm of torque.
How much oil does the GM LLT take and which one?
Engine oil capacity: 5.7 liters. Recommended oil: 5W-30.
Does the GM LLT have a timing belt or chain?
The GM LLT uses a timing chain.
Is the GM LLT turbocharged?
No, the GM LLT is naturally aspirated.
Does the GM LLT need valve clearance adjustment?
No, the GM LLT has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the GM LLT last?
The typical lifespan of the GM LLT is ~280 000 km with proper maintenance.
What is the fuel consumption of the GM LLT?
Cadillac CTS 2010: city 16.6, highway 8.7, combined 11.6 L/100 km.
What cars was the GM LLT installed on?
Buick Enclave 1 (GMT967) in 2008 - 2017; Buick LaCrosse 2 (GMX353) in 2009 - 2011; Cadillac CTS II (GMX322) in 2007 - 2011; Cadillac STS I (GMX295) in 2007 - 2011; Chevrolet Camaro 5 (GMX521) in 2009 - 2011; Chevrolet Traverse 1 (GMT561) in 2008 - 2017 and 2 more (see the full list above).
What are the common problems of the GM LLT?
This is a completely reliable motor, but its timing chain has a small resource. This is especially true for the units of the first years, their chain stretched up to 100,000 km. All known problems.
