From 2006 to 2014, the American company produced the GM LY5 5.3-liter V8 engine, which was fitted to vehicles built on the GMT 900 platform, including the Chevrolet Tahoe, Silverado, and Suburban. This power unit has a Flexible-fuel modification with its own LMG index.
LR4, LM7, LY2, LY5, LFA, L92, and L86 are the Vortec line.
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 fears overheating, so monitor the water pump and radiator’s condition;
The fuel pump malfunctions and the throttle assembly becomes clogged due to poor fuel;
The primary reason for this engine’s tripling is ignition coil cracking;
Here, cutting back on oil frequently causes the camshaft liners to wear down quickly;
On their own, exhaust manifold bolts may become loose and eventually disappear.