The 2013 GMC Sierra 1500 with the 5.3L V8 uses Dexos1 Gen 1 approved motor oil with a viscosity of 5W-30. You can use a synthetic blend or full synthetic, as long as the oil meets Dexos1 Gen 1 specifications.
This article explains the approved specification, recommended viscosity, and practical details to help you choose the right oil and perform routine maintenance on this truck.
Oil specification and viscosity
Key requirements when selecting oil for this engine include Dexos1 Gen 1 approval and the standard viscosity recommended by GM for this model. The oil should be suitable for everyday driving and ideally in a synthetic blend or full synthetic form to ensure longevity and protection.
- Dexos1 Gen 1 approval for gasoline engines
- Viscosity: 5W-30 (provides good cold-start protection and hot-weather endurance)
- Oil type: synthetic blend or full synthetic (conventional oils alone are not recommended if Dexos1 Gen 1 5W-30 is specified)
- Avoid oils that do not meet Dexos1 Gen 1 specifications or that state Dexos2 unless GM specifically approves them for this engine
Adhering to these specifications helps ensure proper lubrication, engine protection, and compliance with GM’s warranty requirements for the Sierra.
Oil capacity and maintenance schedule
Before listing the practical numbers, note the general capacity and service guidance for this engine.
- Oil capacity: Approximately 8 quarts (about 7.5–8.0 qt) with a new filter
- Recommended change interval: Follow the GM owner's manual guidance; under normal driving, many owners change every 5,000–7,500 miles, while severe service (towing, dusty conditions, short trips) may require more frequent changes
- Oil filter: Replace with a GM-approved filter and ensure proper torques on the drain plug
Regularly checking the oil level and following the recommended maintenance schedule helps maintain engine health and performance.
Practical sourcing and quick tips
When shopping for oil, look for products labeled Dexos1 Gen 1 with a 5W-30 designation. If you’re unsure, ask a GM dealer or a trusted mechanic to confirm that the product meets Dexos1 Gen 1 specifications for a 2013 Sierra 5.3L.
Note: Dexos specifications have evolved over time. For a 2013 model, Dexos1 Gen 1 5W-30 remains the conventional choice, but always verify against your vehicle’s manual and any GM service guidelines for your exact build and climate.
Summary
In brief: For a 2013 GMC Sierra 1500 with the 5.3L V8, use Dexos1 Gen 1 certified motor oil with 5W-30 viscosity. Choose a synthetic blend or full synthetic, and plan on about 8 quarts per oil change. Always confirm intervals and capacity in the owner’s manual or with a GM-certified technician, especially if you tow or operate in extreme conditions.