2015 GMC SIERRA spark plugs replace

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Page 382 of 439

GMC SIERRA 2015  Owners Manual Black plate (5,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
Service and Maintenance 11-5
Maintenance Schedule
Additional Required
Service

Page 384 of 439

GMC SIERRA 2015  Owners Manual Black plate (7,1)GMC 2015i Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-8431500) - 2015 - crc - 6/20/14
Service and Maintenance 11-7
Maintenance Schedule
Additional Required
Service