The engine requires about 8 quarts of engine oil when performing a full change with a new filter. If you skip changing the filter, you’ll be closer to 7 quarts.
In detail, this applies to the 5.3-liter V8 (LC9/L99 family) used in the 2012 GMC Sierra. The total oil capacity is listed as 8 quarts with the filter, and roughly 7 quarts without replacing the filter. For best results, use a Dexos1-certified oil of 5W-30 viscosity and follow Chevrolet-GMC service guidelines, including proper drain, fill, and dipstick checks after running the engine.
Oil capacity specifics
The exact capacity varies depending on whether the oil filter is replaced during the service. The following numbers reflect standard practice for a typical oil change.
- With oil filter: 8 quarts (approximately 7.5–8.0 quarts depending on filter size and drain).
- Without oil filter: about 7 quarts.
Bottom line: For a standard oil-change visit that includes a new filter, plan on adding about 8 quarts of oil.
Oil type and fill procedure
Before listing the recommended oil type and the basic filling steps, note that GM recommends using Dexos1-certified oil, typically 5W-30, suitable for a broad range of temperatures. Always install a new filter, lubricate the gasket, and fill gradually while checking the level with the dipstick.
- Oil type: Dexos1-certified 5W-30 (synthetic or conventional, depending on your preference and driving conditions).
- Fill procedure: After draining, pour oil gradually, run the engine briefly, then recheck with the dipstick and add as needed to reach the full mark.
- Oil filter: Replace with a quality OEM-style filter; consider resetting the oil life monitor if equipped.
Conclusion: Following this approach ensures the correct capacity and proper lubrication for the engine’s longevity.
Oil change intervals and monitoring
Guidance on timing helps drivers plan maintenance, though the vehicle’s oil life monitor can adjust intervals based on actual use.
- Normal driving: about 7,500 miles (12,000 km) between changes, depending on the oil life monitor and driving conditions.
- Severe service: roughly 3,000–5,000 miles (4,800–8,000 km) between changes, depending on conditions such as extreme temps, towing, or dusty environments.
- Oil life monitor: rely on the vehicle’s built-in monitor to determine the optimal change interval.
Conclusion: Adhering to the monitor’s reading and the above guidelines helps maintain engine health and performance.
Summary
The 2012 GMC Sierra 5.3L V8 holds about 8 quarts of engine oil with a new filter; roughly 7 quarts if you do not replace the filter. Use Dexos1-certified 5W-30 oil and follow GM’s recommended change intervals or the oil-life monitor. Replacing the filter is standard for an accurate fill, and always verify the final level with the dipstick after running the engine and rechecking.