RE: Class C cab squeak
Hello,
I use CRC "Heavy Duty Silicone Multi-Use Lubricant" available from Wal-Mart. Look in either hardware or automotive department. It is a large red can with a white label. I spray it along the joints or wherever I find a squeak. It seems to work pretty well. It does smell a little bit at first, so air out your RV for awhile, but the oder dissipates rather quickly. Hope it helps!