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DO NOT replace the main fusible link with a fuse or circuit breaker!DO NOT replace the main fusible link with a fuse or circuit breaker as recommended by some.
- RF_Burns
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GMC Motorhome Tire & Wheel InformationThe definitive guide to tire and wheel options for the GMC Motorhome
- Christo
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Universal joint in tilt steering column is wornI hope this fixes the last of the "play" in my steering
- RF_Burns
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What every GMCer needs to knowA list of useful GMC MH information from soup to nuts!
- RF_Burns
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Embedded Lockers Flash What's Up DisplayInstructions for the What's Up Display for the EBL
- billvv
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Latest reviews
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Disc brake upgrades, part numbers and donor vehiclesThe Eldorado calipers are 63.5mm and have a parking brake lever. Be sure to use D122 pads with...- Christo
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Heat/AC Dash Control and Vacuum Control operation 2021-05-30John gave a great presentation at the 2018 GMCMI Tucson!- Richard RV
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Resource 'Starting an engine that has been sitting for an extended period'
Technical Corner MAINTENANCE, RENOVATIONS, AND MORE Starting an Engine That Has Been Sitting for an Extended Period Larry Weidner | 1978 Royale | Menomonie, Wisconsin The following is just my humble opinion. I offer this FYI. Your milage may vary. Over the last 15 yrs I have seen a number of people get into GMCing buying a GMC that has been sitting for a number of years. In several of those cases, they were able to get the GMC started, put it in gear and drive it home. Sometimes they...- Christo
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Resource 'GMC Motorhome Tire & Wheel Information'
Wheels OEM (Factory) Steel Wheels Firestone Accu-Ride / Accuride Size: 16.5" x 6" Interesting article about the oddball wheel diameter Weight: ~40 lbs. Part #27995 (GM #359402) or 27725 Used from VIN #TZE165V101674 (mid-1975) onward For radial tires 85 PSI max Part number and ® (circled R) or "Radial" stamped on inside of wheel near valve stem Part #27604 (OBSOLETE) For bias ply tires ONLY. Do not use with radial tires. Part number stamped on outside of wheel between two lug holes...- Christo
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A parts list of various disc brake upgrades including the vehicles the parts came from
Jasper TSB on spark plug crossfire
2026-05-20
5-7 igntion cross fire - keep those wires separated
- Featured
Starting an engine that has been sitting for an extended period
Front bearing replacement
front wheel bearing puller
Thingiverse GMC Motorhome Items
2026-04-28
A collection of items from various makers on Thingiverse
An article about rebuilding the Olds 455 engine by Joe Mondello
Front Wheel Bearing Replacement
Rear hub seal & retaining nut proceedures
Updated file to show complete page.
Proper installation of real hub seal and retaining nut pre-load.
Rear Wheel Ramps
2025-12-16
Wooden ramps designed for tandem wheels
My reasoning on the lower rear-end ride height on the GMC.
Locks and keys info by Joe Ekl
2025-11-20
Information on the door, ignition and glove box locks and keys
Birch Screen Door
Step-by-step photos of the Gary Bovee electronic ignition kit installation.
Birch Screen Door
Source files to add the Winlog-EBL dash to a windows PC for monitoring the EBL throttle body ECM.