The following safety points cannot be overemphasized:
Always block the opposite wheel or wheels to keep the vehicle from rolling off the jack.
When raising the front of the vehicle, firmly apply the parking brake.
When the drive wheels are to remain on the ground, leave the vehicle in gear to help prevent it from rolling.
Always use jackstands to support the vehicle when you are working underneath. Place the stands beneath the vehicle's jacking brackets. Before climbing underneath, rock the vehicle a bit to make sure it is firmly supported.
Fig. Fig. 1: Hoisting and jacking points
Fig. Fig. 2: Place a jack in the front on the lower crossmember ...
Fig. Fig. 3: ... but also have a stand available to assist in the support of the vehicle
Fig. Fig. 4: These stands can be placed on the edge of the frame as shown
Fig. Fig. 5: In the rear of the vehicle place the jack on the crossmember after the gas tank
Fig. Fig. 6: When using a lift, place the arm supports in these locations
Fig. Fig. 7: Front lift support location