I have a 2000 Cadillac Seville that won't shift out of the first gear.

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! If your Seville isn't shifting out of first gear and the code is pointing to transmission solenoids, it's likely they need replacing. Overheating due to a broken water pump belt could certainly contribute to solenoid failure. Replacing transmission solenoids can be a time-consuming job, typically requiring several hours. You'll need to drop the transmission pan and sometimes remove parts of the valve body to access the solenoids. Plan on a shop taking anywhere from 4 to 8 hours, depending on their familiarity with the job and any complications. Given the hard shifting when moving from park or neutral into drive, you might also have some wear in the transmission or related components. After replacing the solenoids, keep an eye on the transmission fluid condition and level to ensure everything is running smoothly. If you need any further advice or if you'd like any help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554!