
PIAA 18880 880 Xtreme White Plus
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Used for: Fog Light Bulb Front
Used for: Headlight Bulb High Beam
Used for: Headlight Bulb Low Beam
Used for: Back Up Reverse Light Bulb
Used for: Brake Light Bulb, Tail Light Bulb
Used for: Center High Mount Stop Light Bulb
Used for: Daytime Running Light Bulb
Used for: License Plate Light Bulb, Courtesy Light Bulb(Compare to original - Option 1), Glove Box Light Bulb, Instrument Panel Light Bulb(Compare to original - Option 2)
Used for: Parking Light Bulb, Turn Signal Light Bulb Front, Turn Signal Light Bulb Rear
Used for: Side Marker Light Bulb Front, Side Marker Light Bulb Rear
Used for: Ash Tray Light Bulb, Automatic Transmission Indicator Light Bulb, Instrument Panel Light Bulb(Compare to original - Option 1)
Used for: Check Engine Light Bulb, Courtesy Light Bulb(Compare to original - Option 2), High Beam Indicator Light Bulb, Instrument Panel Light Bulb(Compare to original - Option 3), Parking Brake Indicator Light Bulb, Turn Signal Indicator Light Bulb
Used for: Dome Light Bulb
Used for: Engine Compartment Light Bulb
Used for: Map Light Bulb(Compare to original - Option 1)
Used for: Map Light Bulb(Compare to original - Option 3)
Used for: Trunk or Cargo Area Light
This page helps you find the right bulb sizes for the 2001 GMC Sierra 1500 by lighting position, so you can verify each lamp before you buy. Whether you are replacing a headlight, a brake light, or a small interior bulb, the goal is to match the bulb to the exact location on the truck instead of guessing from appearance alone.
The 2001 Sierra 1500 uses a mix of exterior, interior, and dash bulbs, and some positions may vary by trim, cab style, or lighting package. Use the bulb chart on this page to confirm the correct fit for the front, rear, cabin, and instrument panel lighting on your specific truck.
For best fitment, always compare the listed bulb size with the bulb already installed in your truck, especially if your Sierra has been modified or uses an aftermarket lighting conversion. Trim and package differences can affect certain interior and exterior lamps, and halogen-to-LED swaps may require a different bulb style, added load resistors, or a compatible socket to avoid warning lights or fast flashing. If you are unsure, remove the old bulb and check the number printed on the base before ordering.
The low beam headlight bulb is 9006 on the 2001 GMC Sierra 1500.
The high beam headlight bulb is 9005.
The front turn signal light bulb and the parking light bulb are both listed as 3157A.
The rear turn signal light bulb is 3157A.
Both the brake light bulb and the tail light bulb are listed as 3157R.
The center high mount stop light bulb is 921.
The back up reverse light bulb is 3157.
The daytime running light bulb is 4114.
The front fog light bulb is 880.
The front side marker light bulb is 194NA.
The rear side marker light bulb is 194NA.
The dome light bulb is 211-2.
The trunk or cargo area light bulb is 912.
Common interior and dash bulbs listed for the 2001 GMC Sierra 1500 include 168, 194, 2721, 578, 161, and 93 depending on the location.
Use the chart as your starting point, but always confirm the installed bulb and the exact lamp position on your specific Sierra 1500 before purchasing replacements.