1978 Royale in Cosmopolis, WA

Currently on Hold

Last Updated: 7/12/2019 | Ad Source: Direct

Location: Cosmopolis, Washington

Asking Price: $24,900

1978 Cosmopolis WA

Motorhome Features

  • Model Year: 1978
  • Odometer: 100K
  • Trim: Royale
  • Length: 26FT

Seller Information

  • Seller Type: Private Owner
  • Contact Name: Currently on Hold
  • Phone: Currently on Hold
  • Email: Currently on Hold

Description & More Pictures

Update 7/12/2019 – Ad on hold temporarily.  Please leave your information in the comments section below.

GMC – 1978 Royale w/Caddy 500 engine

1972 Caddy 500ci w/FAST EZ-EFI self-learning; compression 8.5; “RV” cam; built late 2015; smooth running and has about 10k miles; total miles on coach unknown but probably around 150k; was totally rebuilt in about 1995 to the tune of about $100k, complete with new paint, cabinets, mechanical—even etched windows and bar (actually the subject of a long story, mainly about the sociopathic “heiress” who owned it)

HD engine compartment “blanket” system installed when engine was out, reducing decibel and heat levels substantially; went from unable to talk while baking in 70 degree weather to easy conversation and controlled environment—IMHO a necessity for the GMC

Front end completely rebuilt 2019, complete with lower A-frame on L side

New Manny tranny; 3.21 final drive; all disc brakes; Timken bearings

Rear queen bed w/lots of side, end & upper storage; day/night sliding shades throughout coach

Onan 6k generator running on the coach’s 7g LPG tank (smoother & quieter); ceiling/roof AC/heat unit running on 120VAC with ability to install a second unit (with generator, this can be operated on the road); there is a backup propane source, a portable 3g tank

Digidash engine monitoring system; electric wiper conversion

2 – 6VDC series 24 or 27 size house batteries w/water filling system; regular 12VDC starting battery

Marine auto charging system so one or both batteries will charge when not in “combined” status)

Marine style “1 – 2 – Combined” switch; newer 12VDC charging system

Aux electric vacuum pump (mandatory if you want brakes when engine dies)

DRL system for headlights (relay takes load off switch)

Large Zip Dee awning w/supplemental supports; Dual hi/lo rearview cameras

Fire suppression system for engine compartment

Nice fridge/freezer (LPG/12VDC); 2-burner LPG cooktop; 120VAC microwave

Stock air bags w/wi-fi control; Alcoa aluminum wheels w/SS center caps

Micro-lock hydraulic parking brake (w/chocks; original cables gone)

30’ of 50A 120VAC cable (we usually don’t pull more than 15A, per onboard meter)

Newer radiator (OEM brass style for best engine & tranny cooling)

Stock fuel (50g), gray & black tanks; 40g water w/accumulator

Flexsteel capt chairs ($1k ea. In 1995?)

All LED interior lighting & running lights, plus LED red/white cockpit ceiling light

Pex plumbing w/new kitchen faucet; outside shower; dry bath w/original shower (big enough for 6-3 250#); new toilet; new 10g LPG/120VAC hot water tank

Ragusa cast folding step, front bumper step & window wings; lighted chrome ext. handle & LED motion porch light

Tires good for another couple years; TPMS system; CB radio & blue-tooth stereo

Ramco power mirrors; newer headlight/taillight mod’s

2-way ceiling fan w/screen & cover; 2nd non-powered vent (formerly 2nd AC unit)

Aux air system for horns, tires, misc.; accessories for tire changing; HD trailer hitch

Low pressure fuel pump, with plumbed standby switched at dash, to get fuel to the high-pressue EFI resevoir/pump in front of engine (no history of vapor lock issues)

Large cargo pod on roof (Height overall: just under 10’)

Custom door restraint system to prevent distortion of door

John, 360.580.0614 (call/text) [email protected]


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GMCRVForSale.com is a North American ads aggregator focused on (1973 - 1978) Classic GMC Motorhomes. This site features both directly submitted and reposted listings from Craigslist, eBay, RV Trader and more.


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