My primary black/gray are in the normal area up front. But my second gray tank plunger is at the back of my camper, behind the super slide. It would be about 3 feet in front of the rear bumper. Look all along the outside of the frame, I bet you'll find it.
Oh, and I had the same problem. Of course this didn't get covered at the PDI!
Ed and Sharon
2010 Wildcat 28RKBS
2011 Ford F-250 XLT, 6.7L PSD
Ride-Rite Airbags and Airlift wireless remote compressor...nice!
I thought I was wrong once, but I was wrong!