This bulletin applies to 2015-2018 GMC Yukon vehicles equipped with a 5.3L or 6.2L engine, and 2019 Savana vehicles equipped with a 4.3L engine. Some customers may comment about an underhood fuel odor and/or starting the engine sometimes requires extended cranking time.
GM O-ring Woes
Some owners of select GM vehicles may comment on a low brake pedal during braking. See the application list at the end of this bulletin.