no heat

I have a 2006 Tahoe LT and the rear doors won't unlock using the "unlock" doors on the car or remote. Doesn't unlock automatically when placed in park. One was working then stopped so both are now not working. 2nd question: Heater stopped working. Blows but blows cold air. This isn't...

I have 95' with some air duct issues. I have replace 2 of the three actuators, the third, above the gas pedal, has cracked gear but still works. The isssue is, I have no air from the dash ducts. There is air from the floor and from the defrost, when switched to defrost. I can switch the...