Had electrical issues where all in cab controls froze up. Couldn't even adjust volume of radio or turn on headlights gauges didn't register at all. Radio stayed on after truck was shut off, so I disconnected power from the battery to reset the computer. Truck controls came back up fine, but the re was a check engine light on. I read the code (with my own handheld code reader) but didn't clear it so the service department could advise me, code was P2560, which I believe translates to "low coolant level", I checked the coolant level and it was right in the middle between max and min. So I drove it in to get advise as to whether it was a glitch or actually valid, what should be a 5-15 minute assessment. The service writer asked if I wanted to leave it or schedule an appointment, I said I wanted an answer as to whether it was an issue or not, the service writer then stated they were really backed up and wouldn't be able to get to it for 4 days, do I want to leave it or schedule an appointment? Wrong answer. These guys are clueless and aren't even willing to check with a tech for a simple answer and to reset a code.