1998 GMC SIERRA engine

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Page 378 of 452

GMC SIERRA 1998  Owners Manual I Short  Trip/City  Maintenance  Schedule -- Gasoline  Engines I 
The services shown in this schedule up to 100,000 miles 
(I 66 000 km) should be performed after 100,000 miles 
(166 000 km)  at  the

Page 379 of 452

GMC SIERRA 1998  Owners Manual 1 Short  Trip/City  Maintenance  Schedule -- Gasoline  Engines I 
4:::: Drive axle service  (see "Recommended  Fluids and 
Lubricants" 
in the  Index  for  proper  lubricant to use): 
0 Locking  Diffe

Page 380 of 452

GMC SIERRA 1998  Owners Manual I Short TripKity  Maintenance  Schedule -- Gasoline  Engines I 
3,000 Miles (5 000 km) 
Ci Change engine oil and filter (or every 3 months, whichever occurs  first). 
0 Lubricate chassis components (o

Page 381 of 452

GMC SIERRA 1998  Owners Manual I Short TripKity  Maintenance  Schedule -- Gasoline  Engines I 
Lubricate  chassis  components  (or  every 3 months, whichever occurs first). 
0 Check readfront  axle  fluid  level  and add fluid  as

Page 382 of 452

GMC SIERRA 1998  Owners Manual I Short  Trip/City  Maintenance  Schedule -- Gasoline  Engines I 
15,000 Miles (25 000 km) (Continued) 
0 Check rear/front axle fluid  level  and  add  fluid as needed. Check constant 
0 For Two-Wheel

Page 383 of 452

GMC SIERRA 1998  Owners Manual I Short  Trip/City  Maintenance  Schedule -- Gasoline  Engines I 
0 Lubricate  chassis components (or every 3 months, whichever  occurs  first). 
0 Check rearlfront axle fluid level and add fluid as n

Page 384 of 452

GMC SIERRA 1998  Owners Manual I Short  TripKity  Maintenance Schedule -- Gasoline  Engines I 
30,000 Miles (50 000 km) 
0 Change engine oil and filter  (or every 3 months, whichever occurs  first). 
An Emission  Control  Service.

Page 385 of 452

GMC SIERRA 1998  Owners Manual I Short TripKity  Maintenance  Schedule -- Gasoline  Engines I 
0 Lubricate  chassis components  (or every 3 months, whichever  occurs  first). 
0 Check redfront  axle  fluid level and add  fluid  as