. I went to Nashville with my son yesterday in my 99 GC and on the way home the top radiator hose blew and threw the fan belt. I called my oldest sister and she came and got us and took us to Autozone. The dumbass sold me a thermostat without a gasket and insisted that it was correct. I argued that mine didn't have an o-ring, that it had a gasket but she wouldn't listen. So I bought some tools, the thermostat, radiator hose and 2 gallons of anit-freeze and went back to the van. My sister had to get home, so off she went and we were on our own. I told my son that I was pretty sure that the thermostat housing was going to leak and it did. I made it the two miles to Autozone and got everything put back together except for the fan belt. No matter what I tried, I couldn't get that sucker on. I even used the tool from Autozone and finally just called the wife to come get us and left it there overnight. This morning, one of my brothers and I went back to see what we could do. He's pretty strong, so he "KNEW" he could get enough slack on the tensioner. to get the belt on. After about 15 minutes of screwing with it, I went back inside, got the loaner tool and jacked up the passenger side front wheel and took it off and removed the splash shield. From underneath I was able to get enough leverage on the tensioner for him to slide the belt on. Topped it off with anti-freeze and got her home. Ran codes and go a P1491. It's not in my Haynes manual or the manual that came with my Actron scanner. It just says it's a manufacturer specific code. Any of you guys know what this is? I think it's related to the cooling fan relay, so I'm going to swap some out. Shouldn't my cooling fans come on if I turn on the a/c? If so, they're not coming on at all. Maybe that's the problem.