The 2014 GMC Sierra 1500 with the 5.3L V8 uses Dexos1 Gen 2 synthetic motor oil with a viscosity of 0W-20.
Official oil specification
For the 5.3L EcoTec3 engine, GM specifies a Dexos1 Gen 2 certified synthetic motor oil with a 0W-20 viscosity. This combination is chosen to optimize fuel economy, cold-start protection, and overall engine longevity. Always confirm the exact specification in your owner’s manual or on the under-hood oil label on your vehicle.
Dexos1 Gen 2 and viscosity
Dexos1 Gen 2 is GM’s approved standard for newer engines, including the 5.3L in the 2014 Sierra. The recommended viscosity for this engine is 0W-20, which provides good performance across a wide temperature range while supporting efficiency.
Before any purchase, you should ensure the oil you buy explicitly meets Dexos1 Gen 2 and carries the 0W-20 specification. The bottle label will typically include Dexos1 Gen 2 certification and the 0W-20 grade.
Before you buy oil, here are the key requirements to keep in mind:
- Oil must be Dexos1 Gen 2 certified.
- Viscosity should be 0W-20.
- Oil should be a fully synthetic motor oil.
- Do not substitute non-Dexos1 Gen 2 oils unless specifically approved by GM for your engine model.
In short, the correct oil for a 2014 Sierra 1500 with the 5.3L is Dexos1 Gen 2 certified synthetic oil in 0W-20 viscosity.
Practical buying tips
When shopping for oil, check the product label for these indicators to ensure compatibility with your engine:
- Dexos1 Gen 2 certification
- 0W-20 viscosity
- Fully synthetic formulation
- Compatibility with your owner's manual recommendations
Always verify details in your owner’s manual or with a GM dealer or trusted service technician if you’re unsure about which oil to use for your vehicle’s climate, driving conditions, or service history.
Summary
The 2014 GMC Sierra 1500 with the 5.3L EcoTec3 engine requires Dexos1 Gen 2 certified synthetic motor oil with a 0W-20 viscosity. Use a high-quality, fully synthetic oil that carries the Dexos1 Gen 2 logo, and consult your owner’s manual or dealer for any model-specific nuances.
Can I run 5W30 instead of 0W20?
Modern engines designed for 0W-20 oil require specific viscosity for optimal performance, and using thicker 5W-30 oil may compromise efficiency while potentially voiding manufacturer warranties.
What kind of oil does a 2014 GMC Sierra 1500 5.3 L V8 use?
GMC Sierra 1500 Oil Requirements by Engine and Year
| Years | Engine | Oil Type |
|---|---|---|
| 2014-2024 | 5.3L V8 (DFM) | SAE 0W-20 Dexos1 Gen 2 |
| 2014-2019 | 5.3L V8 (AFM) | SAE 5W-30 Dexos1 Gen 2 |
| 2014-2024 | 6.2L V8 | SAE 0W-20 Dexos1 Gen 2 |
| DIESEL ENGINES |
What oil is best for a 2014 GMC Sierra?
The recommended oil for the GMC Sierra model is a synthetic model with 5W-30 for most models, depending on your driving habits and local climate.
How many quarts of oil does a 2014 GMC Sierra 1500 5.3 take?
8 quarts
5.3L V8 – 8 quarts.