How do you replace oil pump on a 1992 gmc safari?

To replace the oil pump on a 1992 GMC Safari, first, ensure the engine is cool and disconnect the battery. Remove the oil pan by taking off the necessary bolts and gently prying it free, then remove the old oil pump from its mounting. Install the new oil pump with a new gasket, ensuring it aligns properly, and then reattach the oil pan. Finally, refill the oil, reconnect the battery, and start the engine to check for leaks.