When upgrading the stock halogen / incandescent lamps to led lighting bulbs, the bulb size guide will be much helpful, below are the bulb size guide for 1990~2002 Chevrolet C1500/ C2500 / C3500 / C1500 Suburban / C2500 Suburban / C3500 Suburban; yet it is for reference only, it is suggested to check the owner manual to confirm the bulb size guide is correct before purchasing.
- High beam headlight for the vehicle with halogen capsule headlamp: 9005; for 1990~1991 Chevy C1500/ C2500 / C3500 with 4 rectangular headlamps: H4701; for 1992~2002 vehicle with sealed beam headlamp: H6054
- Low beam headlight for the vehicle with halogen capsule headlamp: 9006; for 1990~1991 Chevy C1500/ C2500 / C3500 with 4 rectangular headlamps: H4703; for 1992~2002 vehicle with sealed beam headlamp: H6054
- Fog light for 1990~1998 vehicles: H3; for 1999~2003 vehicles: 880 or 894, please check the owner manual to confirm the bulb size before purchasing
- Front turn signal light ( blinker light)/ Parking light for 1990~1991 & 1993~2003 vehicles: 2357A / 2357NA, for 1991 vehicles: 3057 / 3057KX / 3157-SCK
- Rear turn signal light/ Brake light / Tail light for 1990~1992 models: 3057 / 3057KX / 3157-SCK; for 1993~2003 models: 2057 or 3057 / 3157-SCK ; please check the owner manual to confirm the bulb size before purchasing. for 1992~1998 Chevy C1500 Suburban/ C2500 Suburban: 3057 / 3157-SCK
- Back-up reverse light for 1990~1992 models: 3156;for 1993~1998 Chevy C1500/ C2500/3500: 1156 or 3156, please check the owner manual to confirm;for 1999~2002 Chevy C1500/ C2500/3500: 1156 for 1992~1999 Chevrolet C1500 Suburban/ C2500 Suburban: 3156
- License plate light / Tag light for 1993~1994 models: 194 or 67, please check the owner manual to confirm the bulb size;for 1995~2003 models: 194
- Interior Dome light: 211-2
- Interior Map light for 1993~1998 Chevy C1500/ C2500/ C3500: 168 ; for Chevy C1500 Suburban/ C2500 Suburban & 1999~2002 Chevy C1500/ C2500/ C3500: 194 or 212-2
- Interior Trunk / Cargo area light : 906 / 917
- 3rd Brake light/ Center high mount stop light for 1993~2002 Chevy C1500/ C2500 / C3500: 921; for Chevy C1500 Suburban/ C2500 Suburban:LED
- Front side marker light : 194 / 194NA ; Rear side marker light for 1995~1999 Chevy C1500 Suburban / C2500 Suburban: 194
- Courtesy light for 1998~2005 Chevy Blazer: 168 / 906
- Glove box light : 194
- Ash tray light: 194
- Vanity mirror light: 37
- Auto Trans Indicator light: 74
