The GM LY5 5.3-liter V8 engine was produced by the American concern from 2006 to 2014 and was installed on models based on the GMT 900 platform, such as the Chevrolet Tahoe, Silverado and Suburban. There is a Flexible-fuel modification of this power unit under its own LMG index.
Vortec line: LR4, LM7, LY2, LY5, LFA, L92, L86.
Specifications
| Production years | 2006-2014 |
| Displacement, cc | 5327 |
| Fuel system | distributed injection |
| Power output, hp | 315 – 325 |
| Torque output, Nm | 455 – 470 |
| Cylinder block | cast iron V8 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 96 |
| Piston stroke, mm | 92 |
| Compression ratio | 9.9 |
| Features | OHV |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | yes |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 5.7 |
| Fuel type | petrol |
| Euro standards | EURO 3/4 |
| Fuel consumption, L/100 km (for Chevrolet Tahoe 2010) — city — highway — combined |
14.4 9.5 12.2 |
| Engine lifespan, km | ~400 000 |
The engine was installed on:
- Chevrolet Avalanche 2 (GMT940) in 2006 – 2013;
- Chevrolet Silverado 2 (GMT901) in 2006 – 2013;
- Chevrolet Suburban 10 (GMT931) in 2006 – 2013;
- Chevrolet Tahoe 3 (GMT921) in 2006 – 2014;
- GMC Sierra 3 (GMT902) in 2006 – 2013;
- GMC Yukon 3 (GMT922) in 2006 – 2014;
- GMC Yukon XL 3 (GMT932) in 2006 – 2013.
Disadvantages of the GM LY5 engine
- The unit is afraid of overheating, so keep an eye on the condition of the radiator and water pump;
- The throttle assembly is clogged from bad fuel, the fuel pump fails;
- The main cause of the tripling of this engine is the cracking of the ignition coils;
- Saving on oil here often leads to rapid wear of the camshaft liners;
- Exhaust manifold bolts can loosen on their own and then get lost.
