Hi all, I have a 2006 HSE SC 4.2. 175k, mi. Today I blew the alternator serpentine belt, the battery died and I was stuck. Prior to this, the RR had been running very rough. When it is in park, the engine runs like it is going to take off. The fan is going like crazy. It is not idling nicely. Occasionally i will lose power. The truck will almost be in a slow mode, it is running but feels like it is limited in power?? Warning message says to check coolant. I check it and it is fine? Any Thoughts? Thank you.