both brake lights work but they are very dim the third brake light works fine on 2001 Chevrolet Express 3500

ive tried just about everything but replacing thr lights themselves with euro custom lights will that solve the problem

Asked by for the 2001 Chevrolet Express 3500
Check for a loose or corroded ground, the 3rd brake light is sometimes a more independent circuit, or an LED type of bulb system.
1 more answer
Sounds like a bad ground, Check the wires