GMC 1995 Suburban Owner's Manual page 434

Maintenance Schedule I
-
Diesel Engines
17,500 Miles (28 000 km)
E l
Change engine oil and filter (or every 3 months, whichever occurs
first). An E ~ ~ i s s i o u Control Sorvic*e.
0
Lubricate the front suspension, king pin bushings, steering linkage,
transmission shift linkage, transfer case shift linkage, parking brake
cable guides, rear driveline center splines, front axle propshaft splines,
brake pedal springs and clutch pedal springs. Ball joints and king pin
bushings should not be lubricated unless their temperature is 10" F
(-1 2" C), or higher. When weather is cold, let the ball .joints and king
pin bushings warm up before lubrication or they could be damaged.
Perform each of the listed lubrication service items at this mileage
interval (or every 12 months, whichever occurs first).
20,000 Miles
( 3 2
000 km)
0
Change engine oil and filter (or every 3 months, whichever occurs
first). An Emission Corztrol
Sur-rke.
0
Lubricate the front suspension, king pin bushings, steering linkage,
transmission shift linkage, transfer case shift linkage, parking brake
cable guides, rear driveline center splines, front axle propshaft splines,
brake pedal springs and clutch pedal springs. Ball .joints and king pin
bushings should not be lubricated unless their temperature is 10" F
(-1 2" C), or higher. When weather is cold, let the ball joints and king
pin bushings warm up before lubrication or they could be damaged.
Perform each of the listed lubrication service items at this mileage
interval (or every 12 months, whichever occurs first).
0
Inspect shields and underhood insulation for damage or looseness.
Adjust or replace as required. This is a Noise Emission Control
Service. Applicable only to vehicles sold in the United States.
7-66