When doing replacement or upgrading on 1991 – 2004 GMC Sonoma beam capsule cluster digital halogen headlamps inst. sealed with without, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight 1998 – 2004 9006
High Beam Headlight 1998 – 2004 9005
High Beam and Low Beam Headlight 1991 – 1992 H6054
Front Fog Light 1998 – 2004 881
1991 – 1992 H3-55W
Back Up Light 1991 – 1992 1156
1998 – 2004 3057
Brake 1991 – 1992 2057
1998 – 2004 3057
Dome Light 2002 – 2004 562
Front Side Marker 1991 – 1992, 1998 – 2001 194
2002 – 2004 194NA
Front Turn Signal 1991 – 1992 2057
2002 – 2004 3157
1998 – 2001 3157NA
License Plate 1998 – 2004 192
1991 – 1992 67
Parking Light 1991 – 1992 2057
2002 – 2004 3157
1998 – 2001 3157NA
Rear Side Marker 1998 – 2004 194
Rear Turn Signal 1991 – 1992 2057
1998 – 2004 3057
Tail Light 1991 – 1992 2057
1998 – 2004 3057
Luggage Compartment 1998 – 2004 211-2
Center High Mount Stop Light 1998 – 2004 211-2
Courtesy 1991 1003
1992 211-2
1998 – 2001 912
Engine Compartment Light 1998 – 2001 1156
Glove Box 1998 – 2004 194
Map Light 1998 – 2004 212-2
High Beam and Low Beam Headlight 1993 H6054
Front Fog Light 1993 H3-55W
Back Up Light 1993 2057
Brake 1993 2057
Front Side Marker 1993 194
Front Turn Signal 1993 2057
Parking Light 1993 2057
Rear Turn Signal 1993 2057
Tail Light 1993 2057
Engine Compartment Light 1993 1156
Glove Box 1993 1003
High Beam and Low Beam Headlight 1993 H6054
Front Fog Light 1993 H3-55W
Back Up Light 1993 2057
Brake 1993 2057
Front Side Marker 1993 194
Front Turn Signal 1993 2057
Parking Light 1993 2057
Rear Turn Signal 1993 2057
Tail Light 1993 2057
Engine Compartment Light 1993 93
Glove Box 1993 1003
Low Beam Headlight 1994 – 1997 9006
High Beam Headlight 1994 – 1997 9005
Front Fog Light 1994 H3-55W
Back Up Light 1994 – 1997 1156
Brake 1994 – 1997 3057
Front Side Marker 1994 – 1997 194
Front Turn Signal 1994 2057
1995 – 1997 3157NA
License Plate 1994 – 1997 194
Parking Light 1994 2057
1995 – 1997 3157
Rear Turn Signal 1994 – 1997 3057
Tail Light 1994 – 1997 3057
Engine Compartment Light 1995 – 1997 1156
1994 93
High Beam and Low Beam Headlight 1994 – 1997 H4666
Front Fog Light 1994 H3-55W
Back Up Light 1994 – 1997 1156
Brake 1994 – 1997 3057
Front Side Marker 1994 – 1997 194
Front Turn Signal 1994 2057
1995 – 1997 3157
License Plate 1994 – 1997 194
Parking Light 1994 2057
1995 – 1997 3157NA
Rear Turn Signal 1994 – 1997 3057
Tail Light 1994 – 1997 3057
Engine Compartment Light 1994 – 1997 93