Hi, since today I am proud Besiter of a 2001 Cadillac Seville STS, and hope someone can help me with some questions/problems. In general I am enthusiastic about the car, and next to a 2002 Pontiac TransAm is currently my second Ami. A few things disturb however, and indeed there is a problem with the ventilation (but only on the driver side), no matter what temperature I set, it comes only cold air. Is this a known problem? How is that controlled? Is there there a s any valve that doesn’t open ? Or missing vacuum ? The Twilight Sentinel or how the thing is called switches on the light already at the smallest setting . Known problem ? What to do ? At low speeds, especially when starting and when you drive at little speed over unevenness, you can feel this clearly in the steering wheel . Is something difficult to describe . As if the unevenness and associated bumps directly on the steering wheel transfer At higher speeds you can’t see anything about it anymore. Running performance is almost 70 TKM. As the car looks like from the inside, that’s probably true. But I think the car stood for a longer time. Last service according to checkbook August 2007 (75 TKM or 60 months). Does someone like me know how to read out the error codes in the 2001 model? Hope someone can help me further, thank you.