1998 GMC SIERRA engine

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Page 402 of 452

GMC SIERRA 1998  Owners Manual Long TriplHighway  Maintenance  Schedule -- -asoline  Engines 1 
45,000 Miles (75 000 km) (Continued) 
0 Check readfront  axle  fluid level and  add fluid as needed. Check constant 
0 Vehicles  With

Page 403 of 452

GMC SIERRA 1998  Owners Manual Long Tripmighway Maintenance  Schedule -- Gasoline  Engines I 
52,500 Miles (87 500 km) 
0 Change engine oil and filter  (or  every 12 months, whichever  occurs  first). 
0 Lubricate  chassis componen

Page 404 of 452

GMC SIERRA 1998  Owners Manual I Lono Tripmighway  Maintenance  Schedule -- Gasoline  Engines I 
- 
,000 Miles (100 000 km) (Continued) 
An Emission  Control Service. 
0 Inspect  engine 
accessory drive belt. 
0 Replace fuel filter

Page 405 of 452

GMC SIERRA 1998  Owners Manual Long Tripmighway Maintenance  Schedule -- Gasoline  Engines I 
67,500 Miles (112 500 km) 
~~  ~  ~~ 
17 Change engine oil and filter  (or  every  12 months, whichever  occurs  first). 
0 Lubricate cha

Page 406 of 452

GMC SIERRA 1998  Owners Manual Long Tripmighway Maintenance Schedule -- Gasoline  Engines I 
82,500 Miles (I37 500 km) DATE I 
Change engine oil and  filter (or evl_-,r I2 months, whichever occurs  first). 
An Emission  Control Ser

Page 407 of 452

GMC SIERRA 1998  Owners Manual Long  Tripmighway  Maintenance  Schedule -- GasolineEngcI 
0 Vehicles With GVWR Above 8,500 Ibs. Only:  Inspect  shields and underhood 
insulation  for damage  or looseness. Adjust  or replace 
as req

Page 408 of 452

GMC SIERRA 1998  Owners Manual Long  Tripmighway  Maintenance  Schedule -- Gasoline  Engines I 
100,000 Miles (166 000 km) 
0 
0 
0  0 
Inspect spark plug wires. 
An E~nission Control  Service. 
Replace spark plugs. 
An Emission  C

Page 409 of 452

GMC SIERRA 1998  Owners Manual 1 Long  Tripmighway  Maintenance  Schedule -- Gasoline  Engines 
150,000 Miles (240 000 km) DATE 
Drain, flush and  refill  cooling  system  (or  every 60 months  since  last  service, 
Inspect  hoses