6 or 8 bolts (varies) on the heavy bracket side next to the frame, yes make sure you loosen the ground wire to the tank and make sure you clean that area so you get a good ground when reinstalling or your gauge won't read, i use one floor jack and a long piece of 1" X 6" AND YOU'LL BE FINE, IT IS A LOT EASIER TO DRAIN THE TANK DOWN WITH THE OLD GAR(ooops) garden hose or you can just take the large hose off the fuel filler which by the way you need to loosen from the side of the truck or pop the hoses where they enter the tank or you will stay in the up posistion, it really is easy for any do it yourselfer, just take your time and above all do not smoke or use ignition sources when attempting this
while your at it, look at your tank really close as the seams leak over time and now would be the best time to go buy a new tank, most local radiator shops have them at a decent price. jw