Belts Squeal When towing??

[Softride62]

gents,
New to the 200, and had issues with 100 when hooking up trailer lights. On the 200 I hear a belt squeal sound when the trailer is hooked up, could this be an issue with the harness, alternator or something else? On the 100 I had to get a trailer shop wire directly to the battery, or else I would have crazy electrical issues as soon as I hooked up the trailer's lights, like the AC would stay on even after I turned the truck off, etc until I unplugged the trailer then it would go back to normal...help please.

thanks

 

[Softride62]

I hear their may be a potential issue with the trailer module on 2008s, can anyone confirm, is there a TSB?, I have searched high and low

 

[Softride62]

well, I found out it has nothing to do with the trailer/towing. I drove 3 hours on Wed and it started to squeal again...looks like new belt needed? It doesnt do it all the time which is strange...

 

[bdac]

Probably the belt, but check if you waterpump is leaking. My waterpump was leaking at 60k, but didn't exhibit any squealing.

 

[Softride62]

found out it was the tensioner, got it replaced under warranty at Dealer (but had to pay for the belt of course)