When doing replacement or upgrading on 1960 – 1986 Chevrolet C20 Pickup Suburban Panel with 4 headlamps 2 round rectangular, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

 

Low Beam Headlight1981 – 1986H4656
High Beam Headlight1981 – 1986H4651
Back Up Light1981 – 19861156
Brake1981 – 19821157
1983 – 19862057
Dome Light1981 – 1984211-2
1985 – 1986578
Front Side Marker1981 – 1986194
Front Turn Signal1981 – 19821157
1983 – 19862057
License Plate1981 – 198667
Parking Light1981 – 19821157
1983 – 19862057NA
Rear Side Marker1985 – 1986168
Rear Turn Signal1981 – 19821157
1983 – 19862057
Tail Light1981 – 19821157
1983 – 19862057
Luggage Compartment1985 – 19861142
Courtesy1981 – 19841004
Engine Compartment Light1985 – 19861156
Radio Display1985 – 19861893
High Beam and Low Beam Headlight1981 – 1986H6054
Back Up Light1981 – 19861156
Brake1981 – 19821157
1983 – 19862057
Dome Light1981 – 1984211-2
1985 – 1986578
Front Side Marker1981 – 1986194
Front Turn Signal19811157
19821157NA
1983 – 19842057NA
1985 – 19863057NA
License Plate1981 – 198667
Parking Light1981 – 19821157
1983 – 19842057NA
1985 – 19863057NA
Rear Side Marker1985 – 1986168
Rear Turn Signal1981 – 19821157
1983 – 19862057
Tail Light1981 – 19821157
1983 – 19862057
Luggage Compartment1985 – 19861142
Courtesy1981, 1983 – 19841004
Engine Compartment Light1985 – 19861156
Radio Display1985 – 19861893
High Beam and Low Beam Headlight1975 – 1978H6024
Back Up Light1975 – 1978199
Brake1975 – 1978198
Dome Light1975 – 1978578
Front Side Marker1975 – 197897
Front Turn Signal1975 – 1978198
License Plate1975 – 197897
Parking Light1975 – 1978198
Rear Side Marker1975 – 1978168
Rear Turn Signal1975 – 1978198
Tail Light1975 – 1978198
Courtesy1975 – 1978211-2
High Beam and Low Beam Headlight1979 – 19806014
Back Up Light1979 – 19801156
Brake1979 – 19801157
Dome Light1979 – 1980211-2
Front Side Marker1980194
197967
Front Turn Signal1979 – 19801157
License Plate197997
Parking Light1979 – 19801157
Rear Side Marker19801895
1979194
Rear Turn Signal1979 – 19801157
Tail Light1979 – 19801157
High Beam and Low Beam Headlight1979 – 1980H6054
Back Up Light1979 – 19801156
Brake1979 – 19801157
Dome Light1979 – 1980211-2
Front Side Marker1980194
197967
Front Turn Signal1979 – 19801157NA
License Plate197997
Parking Light1979 – 19801157
Rear Side Marker19801895
1979194
Rear Turn Signal1979 – 19801157
Tail Light1979 – 19801157
High Beam and Low Beam Headlight19676014
Brake1967198
Dome Light1967211-2
Front Turn Signal1967198
License Plate196789
Parking Light196767
Rear Turn Signal1967198
Tail Light1967198
Courtesy1967211-2
Low Beam Headlight1960 – 1963H5006
High Beam Headlight1960 – 1963H5001
Brake19631034
1960 – 19621157
Dome Light1960 – 1963211-2
Front Turn Signal1962 – 19631034
1960 – 19611156
License Plate1960 – 196367
Parking Light19621034
19631157
1960 – 196167
Rear Turn Signal19621034
1960 – 19611156
19631157
Tail Light1960 – 19631157
High Beam and Low Beam Headlight1960 – 19636014
Brake1960 – 19611034
1962 – 19631157
Dome Light1960 – 1963211-2
Front Turn Signal1960 – 19611156
1962 – 19631157
License Plate1960 – 196367
Parking Light1962 – 19631157
1960 – 196167
Rear Turn Signal1960 – 19611156
1962 – 19631157
Tail Light1960 – 19631157
High Beam and Low Beam Headlight1964 – 19746014
Back Up Light1969 – 1974199
Brake1964 – 1974198
Dome Light1964 – 1968, 1974211-2
Front Side Marker1974168
1972 – 1973194
Front Turn Signal1966 – 1974198
1964 – 1965199
License Plate1966 – 196889
197497
Parking Light1971 – 1974198
1964 – 196867
1969 – 197097
Rear Side Marker1974194
1972 – 197397
Rear Turn Signal1964 – 1965, 1969 – 19711156
1966 – 1968, 1972 – 1974198
Tail Light1964 – 1974198
Courtesy1964 – 1968211-2
1973212-2
1969 – 1972578
197490
Low Beam Headlight1982 – 1986H4656
High Beam Headlight1982 – 1986H4651
Back Up Light1982 – 19861156
Brake19821157
1983 – 19862057
Dome Light1982 – 1984211-2
1985 – 1986578
Front Side Marker1985 – 1986168
1982 – 1984194
Front Turn Signal19821157
1983 – 19862057
License Plate1982 – 198667
Parking Light19821157
1983 – 19862057NA
Rear Side Marker1985 – 1986194
Rear Turn Signal19821157
1983 – 19862057
Tail Light19821157
1983 – 19862057
Luggage Compartment1985 – 19861142
Courtesy1985 – 19861003
1983 – 19841004
Engine Compartment Light1985 – 19861156
Radio Display1985 – 19861893
High Beam and Low Beam Headlight1982 – 1986H6054
Back Up Light1982 – 19861156
Brake19821157
1983 – 19862057
Dome Light1982 – 1984211-2
1985 – 1986578
Front Side Marker1985 – 1986168
1982 – 1984194
Front Turn Signal19821157NA
1985 – 19862057
1983 – 19842057NA
License Plate1982 – 198667
Parking Light19821157
1983 – 19862057NA
Rear Side Marker1985 – 1986194
Rear Turn Signal19821157
1983 – 19862057
Tail Light19821157
1983 – 19862057
Luggage Compartment1985 – 19861142
Courtesy1983 – 19861003
Engine Compartment Light1985 – 19861156
Radio Display1985 – 19861893
Low Beam Headlight1981H4656
High Beam Headlight1981H4651
High Beam and Low Beam Headlight1967 – 19746014
1975 – 1978, 1980H6024
Back Up Light1980 – 19811156
1969 – 1978199
Brake1980 – 19811157
1967 – 1978198
Dome Light1967 – 1968, 1974, 1980 – 1981211-2
1975 – 1978578
Front Side Marker1974, 1980168
1972 – 1973, 1981194
1975 – 197897
Front Turn Signal1980 – 19811157
1967 – 1978198
License Plate1980 – 198167
1967 – 196889
1974 – 197897
Parking Light1980 – 19811157
1971 – 1978198
1967 – 196867
1969 – 197097
Rear Side Marker1975 – 1978168
1974194
1972 – 197397
Rear Turn Signal1969 – 19711156
1980 – 19811157
1967 – 1968, 1972 – 1978198
Tail Light1980 – 19811157
1967 – 1978198
Courtesy1975 – 1978105
1980168
1967 – 1968211-2
1973212-2
1969 – 1972578
197490
High Beam and Low Beam Headlight19796014
Back Up Light19791156
Brake19791157
Dome Light1979211-2
Front Side Marker197967
Front Turn Signal19791157
License Plate197997
Parking Light19791157
Rear Side Marker1979194
Rear Turn Signal19791157
Tail Light19791157
High Beam and Low Beam Headlight1979H6054
Back Up Light19791156
Brake19791157
Dome Light1979211-2
Front Side Marker197967
Front Turn Signal19791157NA
License Plate197997
Parking Light19791157
Rear Side Marker1979194
Rear Turn Signal19791157
Tail Light19791157