21 Years Available
GMC C2500 Light Bulb Sizes
Complete bulb size reference for the GMC C2500 from 1979 to 2000. Find headlight, fog light, turn signal, and brake light bulb sizes for every model year.
The GMC c2500 changed low beam specifications across model years — 1981–2000: H6054; 1982–1986: H4656; 1979–1980: H6024; 1990: 9006. Make sure to select your exact year below to get the right bulb size.
Year Range
1979 – 2000
21 model yearsBulb Sizes Across Years
| Position | Bulb Type(s) | Years | Status / Shop |
|---|---|---|---|
| Low Beam | H6054(1981–2000) H4656(1982–1986) H6024(1979–1980) 9006(1990–1990) | 21 years | Changed |
| High Beam | H6054(1981–2000) 9005(1988–1992) H4651(1982–1986) H6024(1979–1980) | 21 years | Changed |
| Fog Light | H3(1993–2000) | 8 years | Consistent |
| Brake Light | 74(1993–1997) 1157(1979–1982) 3157CK(1990–1992) 921(1999–2000) 912(1998–1998) | 15 years | Changed |
| Side Marker | 194(1988–2000) 168(1979–1986) | 21 years | Changed |
| Turn Signal Front | 2357NA(1993–2000) 1157A(1979–1982) 3157CK(1992–1992) 1157(1981–1981) | 13 years | Changed |
| Turn Signal Rear | 1157(1979–1982) 3057(1998–2000) 3157CK(1990–1992) | 10 years | Changed |
| Reverse Light | 1156(1979–1997) 3156(1990–2000) | 21 years | Changed |
| License Plate | 194(1988–2000) | 13 years | Consistent |
| Parking Light | 2357NA(1993–2000) 1157A(1979–1982) 3157CK(1992–1992) 1157(1981–1981) | 13 years | Changed |
| Trunk Light | 912(1999–2000) 921(1998–1998) | 3 years | Changed |
| Tail Light | 3157CK(1990–2000) 1157(1979–1982) 3057(1996–1998) | 15 years | Changed |
| Daytime Running | 3157CK(1999–1999) | 1 years | Consistent |
| Dome Light | 211-2(1993–1998) | 6 years | Consistent |
Common C2500 Replacement Parts
Select Your Year
More from GMC
Frequently Asked Questions
We have bulb size data for the GMC C2500 from 1979 to 2000, covering 21 model years. Select your year below for a complete position-by-position bulb chart.
Yes, the GMC C2500 changed low beam bulb specifications across generations: 1981–2000: H6054; 1982–1986: H4656; 1979–1980: H6024; 1990–1990: 9006. Make sure to check your exact year using the list below.
The GMC C2500 uses a H6054 bulb for the low beam (same bulb serves both high and low beam via dual filament), and a H3 for the fog lights. Select your year below for the exact fitment chart.
Yes. The GMC C2500 uses a H6054 low beam, and direct-fit LED conversion kits for that size are widely available. LED upgrades typically produce 2–3× more light output than stock halogen and last 25,000+ hours. Look for a DOT-compliant kit with a proper beam cutoff pattern.
Select your model year from the list below. Each year page shows every bulb position — low beam, high beam, fog light, turn signal, and brake light — with the correct size and a link to buy it on Amazon.