The 2006 GMC sierra 1500 oil type and capacity iS5w30 and 6 quarts. Having high quality oil is key for the engine to run smoothly. You will run into issues with the oil at some point. Knocking noise may show up from the engine. Bad oil can cause the engine to stop working. A common problem is an awful burning smell. This needs to be inspected as soon as possible or the car might explode. You could experience bad gas mileage. Your oil needs to be replaced eventually. Every 5,000 to 10,000 miles is a good rule of thumb. If You don't replace it, there will be issues with the engine.
John A.
January 2, 2020
All the engine options available for the the 2006 GMC Sierra 1500 all use synthetic formulated 5W30 oil. The following are the capacities for the different available engines for the 2006 GMC Sierra 1500: the 4.3L V6=4.5 quarts the 4.8L V8=6 quarts the 5.3L V8 (engine code [B] B)=6 quarts the 5.3L V8 (engine code [B] L33 1)=6 quarts the 5.3L V8 (engine code [T] D)=6 quarts the 5.3L V8 (engine code [T] T)=6 quarts the 5.3L V8 Flex=6 quarts and the 6.0L V8=6 quarts. The 2006 GMC Sierra 1500 HD's 6.0L V8 needs 6 quarts of 5W30 synthetic oil.
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