The GM LY2 or Vortec 4800 4.8-liter V8 engine was produced by the company from 2006 to 2017 and was installed on Tahoe and Yukon SUVs, Silverado pickups, Express and Savana minibuses. In 2009, this unit received a variable valve timing system and its L20 index.
Vortec line: LR4, LM7, LY2, LY5, LFA, L92, L86.
Specifications
| Production years | 2006-2017 |
| Displacement, cc | 4806 |
| Fuel system | distributed injection |
| Power output, hp | 260 – 305 |
| Torque output, Nm | 400 – 415 |
| Cylinder block | cast iron V8 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 96 |
| Piston stroke, mm | 83 |
| Compression ratio | 9.1 |
| Features | OHV |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | since 2009 |
| 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 2008) — city — highway — combined |
13.9 9.0 11.9 |
| Engine lifespan, km | ~400 000 |
The engine was installed on:
- Chevrolet Express 2 (GMT610) in 2006 – 2017;
- Chevrolet Silverado 2 (GMT901) in 2006 – 2013;
- Chevrolet Tahoe 3 (GMT921) in 2006 – 2009;
- GMC Savana 2 (GMT610) in 2006 – 2017;
- GMC Sierra 3 (GMT902) in 2006 – 2013;
- GMC Yukon 3 (GMT922) in 2006 – 2009.
Disadvantages of the GM LY2 engine
- Keep an eye on the condition of the radiator and water pump, there are many problems from overheating;
- The use of bad oil often results in wear of the camshaft liners;
- From bad fuel, the throttle quickly becomes dirty, the fuel pump fails;
- And cracking of ignition coils often leads to tripling of the power unit
- Still here, the exhaust manifold bolts are often unscrewed and its casing falls off.
