When doing replacement or upgrading on 2004 – 2018 GMC Canyon, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight2004 – 2012 9006
2015 – 2018 H11
High Beam Headlight2004 – 2012, 2015 – 2018 9005
Front Fog Light2004 – 2012 9045
2015 – 2018 PS24WFF
Back Up Light2004 – 2012 3057
2015 – 2018 921
Brake2004 – 2012 3057
2015 – 2018 7443
Daytime Running Light2004 – 2012 4157
Dome Light2004 – 2008 561
2009 – 2012 578
Front Side Marker2015 – 2018 194
2004 – 2012 3757NA
Front Turn Signal2004 – 2012 3757NA
2015 – 2018 7444NA
License Plate2009 – 2012 12961
2004 – 2008, 2015 – 2018 194
Parking Light2004 – 2012 3757NA
2015 – 2018 7443NA
Rear Side Marker2004 – 2012 3057
2015 – 2018 7443
Rear Turn Signal2004 – 2012 3057
2015 – 2018 7443
Tail Light2004 – 2012 3057
2015 – 2018 7443
Luggage Compartment2004 – 2012 912
2015 – 2018 921
Center High Mount Stop Light2004 – 2012 912
2015 – 2018 921
Courtesy2009 – 2012 168
Map Light2015 – 2018 12961
2004 – 2008 212-2
2009 – 2012 578