I am looking for an owner's manual for a 1970, Tow Low Model 400D. My daughter inherited this camper from her grandmother, who no longer has the manual. Any help with this would be greatly appreciated!

Welcome to the forum. manuals didn't change much between year models. This should get you started.

http://www.hilotrailerforum.com/f49/...gle-axle-2196/

http://www.hilotrailerforum.com/f49/...on-voyage-836/

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"Ruben"
2404T, 2003 2500HD 4X4 GMC Sierra SLT Crew Cab w/Astro camper shell and 2003 Chevy Tahoe LE 4X2
Far West Texas