Your GMC, 1000-Series’s oil pan gasket makes a seal between the engine block and the oil pan. The gasket keeps the oil in the oil pan, as well as helping to maintain the correct pressure. When an oil pan gasket isn’t working properly, oil leaks can show up around the perimeter of the oil pan. At this point, too many drivers mistake a faulty gasket for a malfunctioning oil pan and spend a significant amount of money replacing the entire pan. If the oil pan on your GMC, 1000-Series appears undamaged, replace the gasket first and see if the leak goes away. Replacing a oil pan gasket can be a messy task, but as long as you keep a few points in mind, your car will perform better. Try not to bend the oil pan on your GMC, 1000-Series. Don’t pry it off with a screwdriver or hit it with a mallet. Once the pan is off, check it for metal bits that can indicate other problems... View more and clean the gunk out of the bottom of the pan so you can inspect it for cracks. View less
