GM Buick/Oldsmobile/Pontiac/Full-Size 1975-1990 Repair Guide



See Figure 1

Click image to see an enlarged view

Fig. Fig. 1: Lifting and jacking points.

All models covered in this guide are equipped from the factory with a ratchet-type bumper jack. This jack was only designed to aid tire changing in emergency situations; it was NOT designed as a maintenance tool. Never get under the vehicle when it is supported by only a jack.

A sturdy set of jackstands (at least two) and a hydraulic floor jack of at least 11/2ton capacity are two of the best investments you can make if you are serious about maintaining your own vehicle. The added safety and utility of a hydraulic floor jack makes this tool pay for itself many times over through the years.

Drive-on ramps are also commercially available; they raise the front end of the vehicle up about 10-12 in. (254-305mm). Make sure yours are of all-welded construction and made from strong, square tubing. You must make sure the rear wheels are blocked when using ramps.

NEVER Use concrete cinder blocks for supporting any type of vehicle. Their use can be extremely dangerous, as they easily break if the load is not perfectly distributed.

Regardless of the method of jacking or hoisting the vehicle, there are only certain areas of the undercarriage and suspension you can safely use to support the vehicle. Some models are equipped with slots in the bumpers, into which the bumper jack engages for changing tires. See the accompanying illustration, and make sure that only the shaded areas are used. Also, be especially careful not to damage the catalytic converter when jacking or supporting the vehicle.