corn18

Replaced the power steering pump. The power steering fluid was very dark and smelled bad. Steering is easier now as well. So maybe that was the problem all along. Will see tomorrow AM when I start the engine cold.

Well, the squeal is still there. Will replace power steering pump today.

Ok, replaced the water pump and the squeal seems to have gone away. Will have to wait until tomorrow morning to know for sure but I am hopeful.

Yup, left the belt on the ac when I removed the serpentine belt. I'll replace the water pump and go from there. Thanks!

Ok, finally got around to this. I removed the serpentine belt and started the truck. No squeal or odd noises, so the air conditioner compressor is not the source. Replaced the serpentine belt and the squeal was there. I also removed the clutch fan and the squeal was still there. So I guess it is either the water pump or the power steering pump. I did turn the steering wheel and the squeal did not change so would my best bet be to change the water pump?

Coolio. Will try that in the morning. Can only troubleshoot one thing a day.

Howdy. About a year ago my 2015 2500HD 6.0L flex fuel developed a loud squeal on the first startup of the day. Only happens on the first startup even if the truck sits for a long while after the first startup. I have changed the serpentine belt, tensioner pulley and the idler pulley. Still there. I tried listening with one of those stethoscope thingies but the radiator fan is too loud. Before I take it to a stealer, what else can I troubleshoot? Thanks! Here's a link to a video on facebook. Not sure how to post it directly here. https://www.facebook.com/100004961733954/videos/493003216698713/

Contact the folks @ https://boostautoparts.com. They will have a solution. It likely is not the motor but a control box. I had the same issue with my passenger side mirror and they sent me a new control box and it works like a charm. Good luck!

I just put the rubber wrapper type cover on mine and works like a champ. https://www.amazon.com/gp/product/B074RFB84R/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I have a 2015 2500HD 6.0 gasser. I bought a Diablo tuner and used a stock tune and added a pedal box. That helped a little but not worth the money. Then I had diablew do a custom tune for me and that really lit up the truck. I had him do a 92 octane tune. Not towing the truck is how I would have expected it to be from the factory. It improved gas mileage just a skosh. I went from 11.5 mpg with mixed driving to 12.5. I asked diablew to maximize towing performance, so not sure what he did, but it wasn't maximize mpg. The towing performance is better. I haven't towed enough to know for sure. I am pulling an 11,000 lbs 5er.

I had this installed on my 2015 Chevy 2500HD 6.0 gasser for a year. I finally got a custom tune and no longer need this. This pedal box does a great job of improving throttle response. I got tired of flooring it every time I wanted to go faster. This does the job. It does nothing but change the signal going to the ECU, so no power boost. Just feels better. $200 shipped. (sells for $299 new). Tom

I got an intune i3 platinum and went with the stock 93 tune. It improved things but I still had to get a pedal box so I wasn't flooring it all the time to get moving. Then a nice fellow recommended I contact diablewtuning.com. I did. Since I had the i3 platinum, he could help me out. So I did a data log and sent that to him. He sent me back a custom tune. Holy crap! I had to pull the pedal box because I kept squealing the tires. This thing is now performing as I would have expected vs. being a giant, 2 ton pig. I'm only 90 miles into this diablew tune. Once I hit 150 miles, he wants me to do another data log during a WOT acceleration run. Then he tweaks it and sends it back. If it gets any better, I will be really happy. The reason I wanted a tune was for towing my 10,000 lbs fifth wheel. It's snowing here, so won't be able to pull it for a while. Unfortunately, he doesn't do custom tunes for other brand tuners. But if anyone is in the market for a great custom tune for their 6.0, I would highly recommend going the diablew route. Major improvement.

20,000 lbs of camping goodness.

Get a bigger truck. You are approaching DRW territory with that trailer. 2x a year or not, your truck is way overloaded with that trailer.

You're going to be overweight pulling a 14k 5er.