Chevrolet Impala 2003 Bulb Size
Bulb size chart
This page helps you verify the bulb sizes for the 2003 Chevrolet Impala by lighting position, so you can match the correct replacement before you buy. Whether you are changing a headlight, a license plate lamp, or an interior bulb, checking the location first is the easiest way to avoid ordering the wrong part.
The 2003 Chevrolet Impala uses a mix of common halogen bulbs and smaller interior lamps, and some positions may vary with trim, market, or body style. Use the chart on this page to compare each light location with the listed bulb type, especially if you are replacing more than one bulb at the same time.
Fitment can vary by trim package, factory lighting equipment, and whether the car has been modified with aftermarket parts. Some owners replace halogen bulbs with LED upgrades, but LED conversions may change beam pattern, brightness, or warning behavior if the housing was designed for halogen. Before ordering, it is smart to remove the installed bulb and compare the base and markings to the listing, especially for exterior lights like the 9005 high beam, 3457A front turn/parking light, 3057R tail and brake light, and 893 fog light positions.
FAQ
What bulb does the 2003 Chevrolet Impala use for the high beam headlight?
The high beam headlight bulb listed for the 2003 Chevrolet Impala is 9005.
What is the daytime running light bulb size on this Impala?
The daytime running light bulb is also listed as 9005.
Which bulb fits the front fog lights?
The front fog light bulb listed for this model is 893, and it may apply only to vehicles equipped with fog lamps.
What bulb is used for the front turn signal and parking light?
The front turn signal light bulb is 3457A, and the parking light bulb is also 3457A.
What bulb fits the rear turn signal lights?
The rear turn signal light bulb listed for the 2003 Chevrolet Impala is 3057.
What bulb do the brake lights use?
The brake light bulb listed for this model is 3057R.
What bulb fits the tail lights?
The tail light bulb listed for the 2003 Chevrolet Impala is 3057R.
What size is the back up reverse light bulb?
The back up reverse light bulb is listed as 921.
What bulb is used for the center high mount stop light?
The center high mount stop light bulb is listed as LED on this page.
What bulb fits the dome light?
The dome light bulb listed for this Impala is 578.
What bulb is used for the trunk or cargo area light?
The trunk or cargo area light bulb is listed as 912.
Which bulb sizes are used for the license plate and small interior lights?
The license plate light, glove box light, map light, courtesy light, and ash tray light are listed as 194 or 7441.
What bulb fits the side marker lights?
Both the front side marker light and rear side marker light are listed as 194NA.
Can trim or body style change the bulb fitment on a 2003 Chevrolet Impala?
Yes. Trim level, lighting package, and body style can affect fitment, so it is best to confirm the bulb by position and compare the installed bulb before buying.