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 1990~2005 Chevrolet Blazer; 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 1992~2005 Chevy Blazer with halogen capsule headlamp: 9005
- Low beam headlight for 1992~2005 Chevy Blazer with halogen capsule headlamp: 9006; for 1992~1997 Chevy Blazer with sealed headlamp: H4666
- Fog light for 1993~1994 Chevy Blazer: H3; for 1998~1999 & 2004~2005 Chevy Blazer: 880 or 881, please check the owner manual to confirm the bulb size before purchasing; for 2000~2003 Chevy Blazer: 881 / 881L
- Front turn signal light ( blinker light)/ Parking light for 1990~1992 Chevy Blazer: 3057NA or 2057, please check the owner manual to confirm the bulb size before purchasing for 1993~1994 Chevy Blazer: 2357NA / 2357A for 1995~2005 Chevy Blazer: 3157A / 3157NA / 3157 / 3157K / 3157-SCK
- Rear turn signal light/ Brake light / Tail light for 1990~1992 Chevy Blazer: 2057 for 1993~2005 Chevy Blazer: 3057 / 3157-SCK
- Back-up reverse light for 1990~1991 & 1995~1997 Chevy Blazer: 115 for 1992~1994 Blazer: 1156 or 3156, please check the owner manual to confirm.for 1998~2005 Chevrolet Blazer: 3156
- License plate light / Tag light for 1990~1994 Chevy Blazer: 194 or 67, please check the owner manual to confirm the bulb size; for 1995~2005 Chevy Blazer: 194
- Interior Dome light for 1990~1994 Chevy Blazer: 211-2 ; for 1998~2005 Chevy Blazer: 562 or 564, pleaes check the owner manuel to confirm the bulb size.
- Interior Map light for 1990~1991 Chevy Blazer: 906 ; for 1993~1994 Chevy Blazer: 67 or 194; for 1995~1997 Chevy Blazer: 194; for 1998~2005 Chevy Blazer: 194 or 212-2
- Interior Trunk / Cargo area light : 906 / 917
- 3rd Brake light/ Center high mount stop light:LED
- Front side marker light : 194 / 194NA
- Courtesy light for 1998~2005 Chevy Blazer: 168 / 906
- Glove box light for 1990~1991 & 1998~2005 Chevrolet Blazer: 194; for 1993~1997 Chevy Blazer: 1003 or 194.
- Ash tray light: 161
- Vanity mirror light: 37
- Auto Trans Indicator light: 74
