electrical problems

So My OBD port and Defrost and A/C fan is not working. The Defrost and A/C fan works when it it wants too meaning when I turn it on sometimes it works and then sometimes it doesn't plus the cigarette light on the right driver side doesn't work. Any suggestions of what could be going on? Oh it's...

I bought a black '05, 1500, 5.3L back in last September that looked really good when I bought it. The guy mentioned having pressure washed it to do some work replacing gaskets. I should have known then that something was wrong. Truck has had problems since buying it, shuddering while idling...

I have a 2002 Chevy avalanche 1500 and sometimes on matter what I do at night only the brights come on and other times I cant get the brights on and only the ordinary ones will come on in place of them, is there an easy way to solve this? whats the problem?

I have 2009 chevy avalanche Replaced the starter, alternator and battery several times After 3 days battery is dead. Must be bad circuit drawing power when truck is off I pulled postive terminal off battery and connected test light between batt terminal and positive cable and test light...

For reasons that I cannot explain, my cluster, radio, and climate control all get super dark to where I can't read anything. It will be fine and then while I'm driving, it's goes dark. Eventually it comes back on 🤷🏽‍♂️ Also worth noting that my radio doesn't work, I think it's the amp...

So to start, I have a 2009 Avalanche LTZ 5.3 LMG with a little over 235k on it. On Thursday 10/28, I drove across town to spend time with my daughter. On the way there, I stopped at two different grocery stores. When I came out, both times, the truck started and ran fine. Got to my daughters...

2007 5.3 ly5. 365k miles dod delete, diablo predator 2 running stock tune with no dod, new battery ,new alternator so a small history of what I am seeing or dealing with. I am having issues with one part making other parts malfunction. I had a collapsed dod lifter that made the transmission...