Manufacturers and Distributors of   Original GMC Motorhome Parts and Publications since 1979.

GMC Motorhome Publications Cinnabar Engineering, Inc. is the distributor of all GMC Motorhome and GMC Transmode publications. You can click on any of the titles below for more information about these publications. GMC Motorhome Maintenance Manual X-7525 1976 Maintenance Manual Supplement X-7625 1977 & 1978 Maintenance Manual Supplement X-7725 GMC Motorhome Service Bulletins X-0021 GMC Motorhome & Transmode Parts Book 78Z 1977 GMC Motorhome Operating Manual X-7721A 1978 GMC Motorhome Operating Manual X-7821A 1977 GMC Transmode Operating Manual X-7780A 1978 GMC Transmode Operating Manual X-7880A GMC Motorhome & Transmode Maintenance Schedule X-7822A GMC Motorhome Vacationland Coloring Book 7325 To order any of these publications, please call 800-720-2227 or 810-648-2444. Important Note We distribute publications for GMC Motorhomes built from 1973 to 1978. Helm distributes all other GM publications. Some will be photocopies. For other GM Publications, telephone Helm at 1-800-782-4356. GMC Motorhome News is a publication dedicated to the preservation of a classic & timeless vehicle, the GMC Motorhome. Learn much more about GMC Motorhome News right here! Previous Page Home Page || Site Map || Contact Us

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