A/c

Chevrolet » Trailblazer » 2002-2008
Question

recently i had to swap relays on my truck to get my low beams to work propperly, there was a faulty relay i hadnt replaced yet, i dont know if thats the issue or if something else is going on, id like to know what fuses/relays to check before i go and spend money on something i could have done myself