2003 GMC SIERRA DENALI gas mileage

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Page 286 of 428

GMC SIERRA DENALI 2003  Owners Manual As in the  chart  shown  previously, SAE 5W-30 is the 
only  viscosity  grade  recommended  for  your  vehicle. 
You  should  look  for  and  use only oils  which  have the 
API  Starburst  symbol  an

Page 379 of 428

GMC SIERRA DENALI 2003  Owners Manual Part A: Scheduled  Maintenance 
Services 
This part contains engine oil and chassis lubrication  scheduled  maintenance  which  explains the engine oil life 
system  and  how  it indicates  when to ch