When doing replacement or upgrading on 2004 – 2018 Chevrolet Colorado with halogen capsule headlamps sealed beam, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight 2004 – 2006 9006
High Beam Headlight 2004 – 2006 9005
Front Fog Light 2004 – 2006 H8/H11/H16
Back Up Light 2004 – 2006 3057
Brake 2004 – 2006 3057
Daytime Running Light 2004 – 2006 4157
Dome Light 2004 – 2006 561
Front Turn Signal 2004 – 2006 3757NA
License Plate 2004 – 2006 194
Parking Light 2004 – 2006 3757NA
Rear Turn Signal 2004 – 2006 3057
Tail Light 2004 – 2006 3057
Luggage Compartment 2004 – 2006 912
Center High Mount Stop Light 2004 – 2006 912
Map Light 2004 – 2006 578
High Beam and Low Beam Headlight 2004 – 2006 H6054
Back Up Light 2004 – 2006 3057
Brake 2004 – 2006 3057
Daytime Running Light 2004 – 2006 4157
Dome Light 2004 – 2006 561
Front Turn Signal 2004 – 2006 3757NA
License Plate 2004 – 2006 194
Parking Light 2004 – 2006 3757NA
Rear Turn Signal 2004 – 2006 3057
Tail Light 2004 – 2006 3057
Luggage Compartment 2004 – 2006 912
Center High Mount Stop Light 2004 – 2006 912
Map Light 2004 – 2006 578
Low Beam Headlight 2007 – 2012 9006
2015 – 2018 H11
High Beam Headlight 2007 – 2012, 2015 – 2018 9005
Front Fog Light 2009 – 2012 9045
2007 – 2008 H8/H11/H16
2015 – 2018 PS24WFF
Back Up Light 2007 – 2012 3057
2015 – 2018 921
Brake 2007 – 2012 3057
2015 – 2018 7443
Daytime Running Light 2007 – 2012 4157
Dome Light 2007 – 2008 561
2009 – 2012 578
Front Side Marker 2015 – 2018 194
2009 – 2012 3757NA
Front Turn Signal 2007 – 2012 3757NA
2015 – 2018 7444NA
License Plate 2009 – 2012 12961
2007 – 2008, 2015 – 2018 194
Parking Light 2007 – 2012 3757NA
2015 – 2018 7443NA
Rear Side Marker 2009 – 2012 3057
2015 – 2018 7443
Rear Turn Signal 2007 – 2012 3057
2015 – 2018 7443
Tail Light 2007 – 2012 3057
2015 – 2018 7443
Luggage Compartment 2007 – 2012 912
2015 – 2018 921
Center High Mount Stop Light 2007 – 2012 912
2015 – 2018 921
Courtesy 2009 – 2012 192
Map Light 2009 – 2012 212-2
2007 – 2008 578