Where is the relay? What else should I check?

Running lights will not turn off and draining the battery. Two shops later still does not know what is wrong. Brand new alternator, water pump, and replaced the light switch. Please help

1992 4.9 cadillac engine have to replace head gasket do i need to drill and tap alum engine block

I am thinking of buying a 92 Cadillac Deville and the previous owner stated it needs a large and small body module as well as the full muffler system. what would these repairs cost?

Battery does not keep a charge

If I let it sit for a while it will start and I can drive agan but it cut of after a mile or two and does the same thing by cutting and when I re-start it seem to have trouble getting fuel to remain running.

The high beems work but will not stay on u have to hold them. The low beems I'm having trouble with they won't turn back on. When they went out both did at the same time but only the passengers side burnt up. An I have replaced it all ready. How do I fix this where is the problem? ?

The problem only happens when I get to and below 3 gallons.

no gastank gauge, no heater air or defroster all lights out