Find a wiring brake light wiring diagram?

Tiny
APRILCHRISTMAS83
  • MEMBER
  • 2005 CHEVROLET SILVERADO
  • 0.8L
  • V8
  • 4WD
  • AUTOMATIC
  • 23,300 MILES
I can't seem to find a wiring brake light wiring diagram for my friends 2005 Chevrolet Silverado 2500 HD
Sub-Model:
Base
Engine:
8 Cylinders 6.0L Vortec Compressed Natural Gas (CNG) he had tried to fix the little light in the middle in the back you know the cargo light or whatever on the outside so I can roof of the truck and his brake lights stop working he changed the module and he needs a wiring diagram we're both on a fixed income and I'm confused and he's at his Wit's end trying to figure it out and trying to find one without being charged a million dollars so if you can get me a wiring diagram that would be great thank you for the brake lights

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Monday, February 2nd, 2026 AT 4:34 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 15,507 POSTS
Wow, he has a CNG truck? Those are RARE around here, unless you work for one of the pipelines, or converted your own.
I'll attach the oem and the redrawn diagrams. There is a fuse for the center brake light that may have blown. If he lost all brake lights then check the fuse in the box under the hood, the other two are under the dash.
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Tuesday, February 3rd, 2026 AT 11:30 AM

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