Posted on 8/12/2025
When your Cadillac's onboard computer turns on the "check engine light" it usually is not a cause for celebration. In rare cases, it could be something as simple and inexpensive as the gas cap no longer sealing tight, and a simple gas cap replacement is all that's needed. Unfortunately, there are literally thousands of conditions that could cause the check engine light to be illuminated. At South Denver Automotive, our nationally ASE certified technicians will inspect your Cadillac, and will perform thorough testing to get to the root cause of the problem. From faulty spark plugs, ignition coils that need replacement, bad oxygen sensor, to emission issues and even catalytic converter problems, we will get your vehicle diagnosed and repaired right. In order to expedite the testing, we not only employ highly skilled technicians, but we also provide them with state-of-the-art diagnostic tools, and access to nationwide databases to allow them to rapidly test and diagnose ... read more