I have a 2009 Chevy 2500HD 4X4 that is an occasional driver, now used mostly for towing either my 5th wheels or boat. I had noticed last year while towing that it was taking me longer to stop than in the past. I also noticed that without a trailer it was taking me longer to stop. I did a complete brake job with new rotors and pads, flushed the brake fluid and re-bled - no difference. Checked the system and no leaks viable an no puddles anywhere.

I decided to purchase a high performance brake kit from Summit thinking that would help the problem. $500 dollars later no difference in braking.

Looking for any ideas anyone has as to where to look next.