The Chevrolet Tracker brake light utilizes 7443 and 1157 bulb sizes for the specific lighting components located at the rear of the vehicle. Data for the specified automotive lighting requirements covers the period from 1998 through 2004.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Chevrolet Tracker uses the 7443 bulb for brake lights across the 1999-2004 model years. This bulb is a dual-filament T20 wedge type rated at 12V with a 21W/5W output, where the higher wattage filament serves the brake function and the lower wattage filament serves a secondary running light function.
The 1998 Chevrolet Tracker uses the 1157 bulb for the brake light position rather than the 7443 found in later model years. Although both the 7443 and 1157 share the same 12V, 21W/5W dual-filament rating, they are not interchangeable due to their different base types. The 7443 uses a wedge base while the 1157 uses a BAY15d bayonet base.
Both the 7443 and 1157 bulbs conform to ANSI standards applicable in the US and Canada, indicating standardized electrical and photometric performance across both types.
The Center High Mount Stop Light on the Chevrolet Tracker uses the 921 bulb for the 1998-2002 and 2004 model years. This is a single-filament T15 wedge bulb rated at 12V and 16W.
The 2003 Tracker Center High Mount Stop Light is specified with a 168 bulb rather than the 921 used in surrounding model years. The 168 is a T10 miniature wedge bulb rated at 12V and 4.9W, a significantly lower wattage than the 921.
The 921 and 168 bulbs are not interchangeable despite both using wedge-style bases. The 168 operates at 4.9W compared to the 921 at 16W, and the two bulbs belong to different T-series size classifications, T10 and T15 respectively.
All four bulb types specified for the Tracker, the 7443, 1157, 921, and 168, carry ANSI designations valid for both the US and Canadian markets.