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 family: LR4, LM7, LY2, LY5, LFA, L92, L86, L83, L87.
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.
Frequently asked questions about the GM LY2
How much power does the GM LY2 make?
The GM LY2 develops 260 - 305 hp and 400 - 415 Nm of torque.
How much oil does the GM LY2 take and which one?
Engine oil capacity: 5.7 liters. Recommended oil: 5W-30.
Does the GM LY2 have a timing belt or chain?
The GM LY2 uses a timing chain.
Is the GM LY2 turbocharged?
No, the GM LY2 is naturally aspirated.
Does the GM LY2 need valve clearance adjustment?
No, the GM LY2 has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the GM LY2 last?
The typical lifespan of the GM LY2 is ~400 000 km with proper maintenance.
What is the fuel consumption of the GM LY2?
Chevrolet Tahoe 2008: city 13.9, highway 9.0, combined 11.9 L/100 km.
What cars was the GM LY2 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.
What are the common problems of the GM LY2?
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. All known problems.
