When doing replacement or upgrading on 1988 – 2000 Chevrolet K2500 Suburban with 4 rectangular headlamps 2 halogen capsule 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 Headlight1988 – 1991 H4703
High Beam Headlight1988 – 1991 H4701
Front Fog Light1988 – 1991 H3-55W
Back Up Light1988 – 1989 1156
1990 – 1991 3156
Brake1988 – 1989 2057
1990 – 1991 3057
Dome Light1988 – 1989 211-2
1990 – 1991 578
Front Side Marker1988 – 1989 194
Front Turn Signal1988 – 1991 2357NA
License Plate1988 – 1991 194
Parking Light1988 – 1991 2357
Rear Turn Signal1988 – 1989 2057
1990 – 1991 3057
Tail Light1988 – 1989 2057
1990 – 1991 3057
Courtesy1988 – 1991 1003
Engine Compartment Light1990 – 1991 1156
Glove Box1990 – 1991 194
Radio Display1988 – 1991 1893
High Beam and Low Beam Headlight1988 – 1991 H6054
Front Fog Light1988 – 1991 H3-55W
Back Up Light1988 – 1989 1156
1990 – 1991 3156
Brake1988 – 1989 2057
1990 – 1991 3057
Dome Light1988 – 1991 211-2
Front Side Marker1988 – 1989 194
Front Turn Signal1988 – 1991 2357NA
License Plate1988 – 1991 194
Parking Light1988 – 1991 2357
Rear Turn Signal1988 – 1989 2057
1990 – 1991 3057
Tail Light1988 – 1989 2057
1990 – 1991 3057
Courtesy1988 – 1991 1003
Engine Compartment Light1990 – 1991 1156
Glove Box1990 – 1991 194
Radio Display1988 – 1991 1893
Low Beam Headlight1990 – 2000 9006
High Beam Headlight1990 – 2000 9005
Front Fog Light1999 – 2000 894
1990 – 1991, 1993 – 1998 H3-55W
Back Up Light1999 – 2000 1156
1990 – 1992 3156
Brake1990 – 1992 3057
Dome Light1992 – 1998 211-2
1990 – 1991, 1999 – 2000 578
Front Side Marker1990 – 2000 194
Front Turn Signal1994 – 1996, 1998 2357
1990 – 1991, 1993, 1997, 1999 – 2000 2357NA
1992 3057
License Plate1990 – 2000 194
Parking Light1990 – 1991, 1993 – 2000 2357
1992 3057
Rear Turn Signal1990 – 1992 3057
Tail Light1990 – 1992 3057
Luggage Compartment1993 – 1998 912
1999 – 2000 921
Center High Mount Stop Light1993 – 2000 921
Courtesy1990 – 1991 1003
Engine Compartment Light1990 – 1991 1156
Glove Box1990 – 1991, 1993 – 2000 194
Map Light1993, 1997 – 1998 168
1994 – 1996 194
Radio Display1990 – 1991 1893
High Beam and Low Beam Headlight1992 – 2000 H6054
Front Fog Light1999 – 2000 880
1993 – 1998 H3-55W
Back Up Light1999 – 2000 1156
1992 3156
Brake1992 3057
Dome Light1992 – 1998 211-2
1999 – 2000 578
Front Side Marker1992 – 2000 194
Front Turn Signal1993 – 1998 2357
1999 – 2000 2357NA
1992 3057
License Plate1992 – 2000 194
Parking Light1993 – 2000 2357
1992 3057
Rear Turn Signal1992 3057
Tail Light1992 3057
Luggage Compartment1993 – 1998 912
1999 – 2000 921
Center High Mount Stop Light1993 – 2000 921
Glove Box1993 – 2000 194
Map Light1993 – 1998 168
Low Beam Headlight1992 – 1999 9006
High Beam Headlight1992 – 1999 9005
Front Fog Light1993 – 1999 H3-55W
Back Up Light1992 – 1999 3156
Brake1992 – 1999 3057
Dome Light1992 – 1997 211-2
1998 – 1999 578
Front Side Marker1992 – 1999 194
Front Turn Signal1993 – 1999 2357NA
1992 3057NA
License Plate1992, 1995 – 1999 194
Parking Light1992 2057
1993 – 1999 2357
Rear Side Marker1995 – 1999 194
1993 – 1994 3057
Rear Turn Signal1992 – 1999 3057
Tail Light1992 – 1999 3057
Engine Compartment Light1995 – 1997 12814
Glove Box1995 – 1999 194
Map Light1993 – 1999 168
High Beam and Low Beam Headlight1992 – 1999 H6054
Front Fog Light1993 – 1999 H3-55W
Back Up Light1992 – 1999 3156
Brake1992 – 1999 3057
Dome Light1992 – 1999 211-2
Front Side Marker1992 – 1999 194
Front Turn Signal1992 2057
1993 – 1999 2357NA
License Plate1992, 1995 – 1999 194
Parking Light1992 2057
1993 – 1999 2357
Rear Side Marker1995 – 1999 194
1993 – 1994 3057
Rear Turn Signal1992 2057
1993 – 1999 3057
Tail Light1992 – 1999 3057
Engine Compartment Light1995 – 1997 12814
Glove Box1995 – 1999 194
Map Light1993 – 1999 168