Chevrolet Suburban front and rear side marker bulb sizes include 194, 168, 67, and 3057 options across different model generations. The replacement chart covers 1972 through 2014 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 194 bulb is the most widely used front and rear side marker bulb across the Chevrolet Suburban's model history covered by these specifications. It is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W.
The 168 bulb shares the same T10 wedge form factor as the 194 but draws more power at 4.9W versus 3.78W. Although both are T10 wedge types, they are not the same bulb and are not interchangeable without confirming socket and circuit compatibility.
The Chevrolet Suburban (1992-2014) uses the 194 bulb for the front side marker position across all listed model years in that range, representing the longest uninterrupted fitment span in the specifications.
The front side marker position on the Suburban shifted from the 168 bulb to the 194 bulb between the 1991 and 1992 model years, marking a change in wattage from 4.9W to 3.78W at that position.
The 1979 Suburban front side marker uses the 67 bulb, which has a BA15s bayonet base rather than a wedge base. This base type is physically distinct from the T10 wedge socket used by the 194 and 168 bulbs, making cross-substitution impossible without a socket adapter.
The 97 bulb, used in the front side marker position for 1975-1978 and the rear side marker for 1972, also uses a BA15s bayonet base and is rated at 13W, making it the highest-wattage bulb listed across all side marker positions in these specifications.
The rear side marker position for the 1993-1994 Suburban uses the 3057 bulb, a dual-filament T25 wedge type rated at 27W/7W. This is the only position in the specifications that calls for a dual-filament bulb, and it is not interchangeable with the single-filament 194 used in surrounding model years.
The 2000 Suburban rear side marker is listed with an Early Model qualifier for the 194 bulb, indicating that not all 2000 model year vehicles share the same fitment for that position.
The rear side marker position used the 168 bulb for 1975-1979 before transitioning to the 194 for 1985 onward, with both being T10 wedge types but differing in wattage.
The 1972 Suburban rear side marker uses the 97 bulb with a BA15s bayonet base, while the front side marker for the same year uses the 194 T10 wedge bulb, meaning the two side marker positions on the 1972 model require bulbs with different base types.