I own a 2004 tahoe z71. I purchased it brand new. It has always had electrical issues. First radio. Then headed seats. You would turn on one and the other would go out. Rear door locks. Power seats .Ac blows heat .. Rear sound . All intermittent. Dealerships either think I am crazy or find and repair problem only to have it come back again. Service recommended I get a new car . Only one problem at a time. It seems as soon as I have one thing fixed or it fixes itself another pops up. Till now just irritating. Yesterday tahoe wouldn't start. Clicked odd , and nothing. No warranty . Radio was crazy and reset time to 12 ever time I tried to start it. It has 80k miles. Hoping someone has an idea on repair .. Thank you
Beginning with the no start---is your security light on?