Why is there no heat in your 2005 rendezvous?

If there is no heat in your 2005 Rendezvous, it could be due to several issues. Common culprits include a malfunctioning thermostat, a clogged heater core, or low coolant levels in the system. Additionally, problems with the heater control valve or the climate control system may also prevent warm air from circulating. It's best to check these components or consult a mechanic for a thorough diagnosis.