Park the vehicle on a level surface. Drain the oil and change the filter. Add 4.5 quarts of the correct weight oil and start the engine. Let it run for 1 minute and shut down. Wait 30 minutes and check the oil level. Add as necessary to reach the full mark. You now know the capacity. Do not overfill.
10.1 quarts
5
For the oil it holds 6 quarts with oil/filter change.
6 qts for the 3.5
around between 6.47 and 8.19 quartz
The gas tank on the 2008 GMC Canyon holds 19 gal..
The gas tank on the 2008 GMC Savana holds 31.0 gal..
The gas tank on the 2008 GMC Yukon holds 26 gal..
The gas tank on the 2008 GMC Acadia holds 22 gal..
13 quarts
The gas tank on the 2008 GMC Yukon-Hybrid holds 24.5 gal..
The gas tank on the 2008 GMC Sierra-1500 holds 26.0 gal..