What causes your 2004 Cadillac DTS engine to stall at idle speed?

A 2004 Cadillac DTS engine may stall at idle speed due to several factors, including a dirty or faulty idle air control valve, which regulates air intake during idling. Additionally, issues with fuel delivery, such as a clogged fuel filter or failing fuel pump, can lead to inadequate fuel reaching the engine. Vacuum leaks in the intake manifold or malfunctioning sensors, like the throttle position sensor, can also disrupt the engine's air-fuel mixture, causing it to stall. Regular maintenance and diagnostics can help identify and resolve these issues.