Usually under the plastic cap that has the HOT or COLD icon, there is a Philips head screw that holds the knob on. Under that will be the ring nut that holds the mechanism in place. You might want to have the water off when you loosen the ring nut. When you lube the 'O'ring that is the squeeker, use plumbers grease, not anything else. You can get that at Lowes or Home Depot or any good hardware store
2004 Itasca Sunrise W22 chassis GM 8.1 Allison 1000 Towing a 2007 Chevy Cobalt four wheels down.