On my 2010 2604SS the low point drains are up under the left side skirting and about 8-12 inches forward of the sewer connection. If you lay down and look up in this area you will see them. Once you know where they are it easy to reach under the skirting and find them. My low point drains do have red and blue T handles on the ends. The low point drain T handles are quite small 3/4 inch ?, not to be confused with the black/grey tank dump valves 1 1/2 to 2 inches and black. Hope this clarifies.
2010 Rockwood 2604SS
2008 Silverado 1500 LTZ 4X4
Great Wife and Idiot Yorkie
True Friends are like diamonds, precious and rare.
False ones like autumn leaves found everywhere