See Figure 1
The lubrication chart indicates where the grease fittings are located. The vehicle should be greased according to the intervals in the Preventive Maintenance Schedule at the end of this information.
Water resistant EP chassis lubricant (grease) conforming to GM specification 6031-M should be used for all chassis grease points.
Every year or 7,500 miles the front suspension ball points, both upper and lower on each side of the van, must be greased. Most vans covered in this guide should be equipped with grease nipples on the ball joints, although some may have plugs which must be removed and nipples fitted.
Jack up the front end of the van and safely support it with jackstands. Block the rear wheels and firmly apply the parking brake. If the van has been parked in temperatures below 20°F for any length of time, park it in a heated garage for an hour or so until the ball joints loosen up enough to accept the grease.
Depending on which front wheel you work on first, turn the wheel and tire outward, either full-lock right or full-lock left. You now have the ends of the upper and lower suspension control arms in front of you; the grease nipples are visible pointing up (top ball joint) and down (lower ball joint) through the end of each control arm. If the nipples are not accessible enough, remove the wheel and tire. Wipe all dirt and crud from the nipples or from around the plugs (if installed). If plugs are on the van, remove them and install grease nipples in the holes (nipples are available in various thread sizes at most auto parts stores). Using a hand operated, low pressure grease gun loaded with a quality chassis grease, grease the ball joint only until the rubber joint boot begins to swell out.
See Figure 2
The steering linkage should be greased at the same interval as the ball joints. Grease nipples are installed on the steering tie rod ends on most models. Wipe all dirt and crud from around the nipples at each tie rod end. Using a hand operated, low pressure grease gun loaded with a suitable chassis grease, grease the linkage until the old grease begins to squeeze out around the tie rod ends. Wipe off the nipples and any excess grease. Also grease the nipples on the steering idler arms.
PARKING BRAKE LINKAGE
Use chassis grease on the parking brake cable where it contacts the cable guides, levers and linkage.
TRANSMISSION LINKAGE & DRIVESHAFT
See Figures 3, 4 and 5
Apply a small amount of clean engine oil to the kickdown and shift linkage points at 7,500 mile intervals. The driveshaft and U-joints have grease nipples like the steering linkage and, therefore, are greased in the same manner.