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The recommended oil type and capacity for a 2005 GMC Sierra 1500 is 5w30 and 6 quarts. It is crucial to use high-quality oil to ensure the engine functions properly. Using bad oil can lead to engine failure, indicated by symptoms like a burning smell and knocking noises. This should be addressed promptly to prevent potential dangers like a car explosion. It is advisable to replace the oil every 5,000 to 10,000 miles to maintain engine health and avoid problems with gas mileage. Failure to do so could result in engine issues.
In 2005, all engines available in the GMC Sierra 1500 and 1500 HD require 5W30 synthetic oil. The 2005 Sierra 1500 HD exclusively features the 6.0L V8 engine that needs 6 quarts of oil. On the other hand, the 2005 Sierra 1500 offers various engine choices: the 4.3L V6 base (4.5 quarts), the optional 4.8L V8 (6 quarts), four versions of the 5.3L V8 engine option (engine code B, D, T, and Z Flex require 6 quarts), and the 6.0L V8 (6 quarts).