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 Headlight1998 – 2004 9006
High Beam Headlight1998 – 2004 9005
High Beam and Low Beam Headlight1991 – 1992 H6054
Front Fog Light1998 – 2004 881
1991 – 1992 H3-55W
Back Up Light1991 – 1992 1156
1998 – 2004 3057
Brake1991 – 1992 2057
1998 – 2004 3057
Dome Light2002 – 2004 562
Front Side Marker1991 – 1992, 1998 – 2001 194
2002 – 2004 194NA
Front Turn Signal1991 – 1992 2057
2002 – 2004 3157
1998 – 2001 3157NA
License Plate1998 – 2004 192
1991 – 1992 67
Parking Light1991 – 1992 2057
2002 – 2004 3157
1998 – 2001 3157NA
Rear Side Marker1998 – 2004 194
Rear Turn Signal1991 – 1992 2057
1998 – 2004 3057
Tail Light1991 – 1992 2057
1998 – 2004 3057
Luggage Compartment1998 – 2004 211-2
Center High Mount Stop Light1998 – 2004 211-2
Courtesy1991 1003
1992 211-2
1998 – 2001 912
Engine Compartment Light1998 – 2001 1156
Glove Box1998 – 2004 194
Map Light1998 – 2004 212-2
High Beam and Low Beam Headlight1993 H6054
Front Fog Light1993 H3-55W
Back Up Light1993 2057
Brake1993 2057
Front Side Marker1993 194
Front Turn Signal1993 2057
Parking Light1993 2057
Rear Turn Signal1993 2057
Tail Light1993 2057
Engine Compartment Light1993 1156
Glove Box1993 1003
High Beam and Low Beam Headlight1993 H6054
Front Fog Light1993 H3-55W
Back Up Light1993 2057
Brake1993 2057
Front Side Marker1993 194
Front Turn Signal1993 2057
Parking Light1993 2057
Rear Turn Signal1993 2057
Tail Light1993 2057
Engine Compartment Light1993 93
Glove Box1993 1003
Low Beam Headlight1994 – 1997 9006
High Beam Headlight1994 – 1997 9005
Front Fog Light1994 H3-55W
Back Up Light1994 – 1997 1156
Brake1994 – 1997 3057
Front Side Marker1994 – 1997 194
Front Turn Signal1994 2057
1995 – 1997 3157NA
License Plate1994 – 1997 194
Parking Light1994 2057
1995 – 1997 3157
Rear Turn Signal1994 – 1997 3057
Tail Light1994 – 1997 3057
Engine Compartment Light1995 – 1997 1156
1994 93
High Beam and Low Beam Headlight1994 – 1997 H4666
Front Fog Light1994 H3-55W
Back Up Light1994 – 1997 1156
Brake1994 – 1997 3057
Front Side Marker1994 – 1997 194
Front Turn Signal1994 2057
1995 – 1997 3157
License Plate1994 – 1997 194
Parking Light1994 2057
1995 – 1997 3157NA
Rear Turn Signal1994 – 1997 3057
Tail Light1994 – 1997 3057
Engine Compartment Light1994 – 1997 93