When doing replacement or upgrading on 2004 – 2007 Buick Rainier, 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 – 2007 9006
High Beam Headlight 2004 – 2007 9005
Front Fog Light 2004 – 2007 H8/H11/H16
Back Up Light 2004 – 2007 3157
Brake 2004 – 2007 3157
Dome Light 2004 – 2007 212-2
Front Side Marker 2004 – 2007 194
Front Turn Signal 2004 – 2007 3757NA
License Plate 2004 – 2007 194
Parking Light 2004 – 2007 3757NA
Rear Turn Signal 2004 – 2007 3157
Tail Light 2004 – 2007 3157
Luggage Compartment 2004 – 2007 578
Courtesy 2004 – 2007 194
Glove Box 2004 – 2007 194
Map Light 2004 – 2007 194