So what did you do to your GMC today?

  • Please note, the forum recently had a problem with outbound emails for notifications, registrations, etc. A new email provider has been set up which should resolve all email issues. If you have any further trouble, please DM Christo or reach out via the Contact Us link in the website footer.
Been away for far too long. GMC has sat for a couple of years due to life, but we've been back at it getting it roadworthy again. I'd say this is what have we done to the GMC over the last month LOL.

-Drain tanks
-Change oil
-Pull distributor and prime engine
-Replace ignition module (had a miss when we had last parked it)
-Change oil Onan. Replace head gaskets, clear out the rat nest on top and fix a few chewed up wires
-Get Olds carb rebuilt as it dumped gas into the intake when I tried starting it from a gas jug.
-Also fix chewed on oil pressure gauge line that we discovered was spraying oil when trying to start it up again (thanks rat!)
-Change oil again because of all the gas that dumped into the intake.
-New plugs and wires
-Fix more chewed on wires
-Installed Daytona-Ferrera air bag kit
-Bought Ion rims and new tires to replace the 16.5 steelies and old trans force tires.
-New batteries
-Blue seas on/off switches and new cables for batteries
-Spent a small fortune it appears :ROFLMAO:
 
  • Love
Reactions: tmsnyder
Well, I began a new project. A previous owner had reupholstered everything but the rear lounge with a brown cloth material. It is showing its age. The rear lounge still had the original greed plaid upholstery. I have never sewn before. So I bought a sewing machine and attempted a proof of concept with the rear lounge. I have learned a lot through trial and error, and mostly through mistakes. I tried to keep to the original colors, and tried to keep it 70's looking.

Got some tweaking that still needs to be done, but I am close to having one seat done (see pictures below). I think it looks good, but wonder if something else would look better.
 

Attachments

  • 0 Before 1.webp
    0 Before 1.webp
    2.5 MB · Views: 13
  • Compare old and new.webp
    Compare old and new.webp
    2 MB · Views: 13
  • New installed.webp
    New installed.webp
    746.1 KB · Views: 13
Well, I began a new project. A previous owner had reupholstered everything but the rear lounge with a brown cloth material. It is showing its age. The rear lounge still had the original greed plaid upholstery. I have never sewn before. So I bought a sewing machine and attempted a proof of concept with the rear lounge. I have learned a lot through trial and error, and mostly through mistakes. I tried to keep to the original colors, and tried to keep it 70's looking.

Got some tweaking that still needs to be done, but I am close to having one seat done (see pictures below). I think it looks good, but wonder if something else would look better.
You clearly have a vertical learning curve. 🫡

George Barris did a 1967 Toronado custom that I hate the exterior and love the interior.

IMG_6622.webp

He made 3, here's another that I don't like as much. Still hate the exterior!


Maybe it'll give you some ideas.
 
  • Like
Reactions: Keith V and pvfjr
You won't regret it. I have over 100,000 miles on my Lenzi hubs/knuckles/ bearings. I grease them through the zerk fitting per Dave's instructions every 20,000 miles (or less) and they are still as good as new.
What's the best way to contact Mr. Lenzi? I have my front end apart for control arm bushings, so while its apart I'd like to send him some parts.
 
  • Love
Reactions: tmsnyder
Been away for far too long. GMC has sat for a couple of years due to life, but we've been back at it getting it roadworthy again. I'd say this is what have we done to the GMC over the last month LOL.

-Drain tanks
-Change oil
-Pull distributor and prime engine
-Replace ignition module (had a miss when we had last parked it)
-Change oil Onan. Replace head gaskets, clear out the rat nest on top and fix a few chewed up wires
-Get Olds carb rebuilt as it dumped gas into the intake when I tried starting it from a gas jug.
-Also fix chewed on oil pressure gauge line that we discovered was spraying oil when trying to start it up again (thanks rat!)
-Change oil again because of all the gas that dumped into the intake.
-New plugs and wires
-Fix more chewed on wires
-Installed Daytona-Ferrera air bag kit
-Bought Ion rims and new tires to replace the 16.5 steelies and old trans force tires.
-New batteries
-Blue seas on/off switches and new cables for batteries
-Spent a small fortune it appears :ROFLMAO:
IMG_2782.webp
Brian, we are just over the Sunshine Bridge from you in Palmetto. Maybe we should get together.
 
  • Like
Reactions: WTucker999
I pulled the fuel tanks on my '78 Birch to swap over to my '78 Transmode. A PO had pulled the rear tank off the Transmode - and lord only knows what kind of engineering I'm going to find when I get that one in the air! LOL

Tanks off the Birch are FILTHY - but, at least the gunk seems to be closer to mud in consistency than to scaly rust. Wish me luck!
 

Attachments

  • IMG_0604.webp
    IMG_0604.webp
    1.2 MB · Views: 5
  • Like
Reactions: RoadTrippin
I pulled the fuel tanks on my '78 Birch to swap over to my '78 Transmode. A PO had pulled the rear tank off the Transmode - and lord only knows what kind of engineering I'm going to find when I get that one in the air! LOL

Tanks off the Birch are FILTHY - but, at least the gunk seems to be closer to mud in consistency than to scaly rust. Wish me luck!
I was running ethanol free when I parked it. I was amazed at how clean the fuel was in mine when we drained them. No particulates, just a varnish smell and some cloudiness when the last of the fuel came out of the drains. Lucky so far, so will start filling them back up with fresh tomorrow so I dont have to run the GMC out of a fuel jug while I work on timing and carb idle settings.
 
  • Like
Reactions: WTucker999
IMG_2846.webp
Jus t to make sure, only non ethanol gasoline will ever be in my new 75 gallon aluminum tank,
IMG_2956.webp
and if any gunk gets into the gasoline, it will have to get through the gauntlet of my twinned filter and fuel pump system. Only pure, squeakily clean fuel to the FiTech.
 
  • Like
Reactions: RoadTrippin
Yesterday...
Began the EFI installation:
  • Surge tank mounted
  • O2 and coolant temp sensors installed
  • ECU mounted
  • Wiring Harness routed
  • Air filter/snorkel mounted
Today's plan:
  • Install fuel return fitting
  • Plumb the surge tank
  • Swap the carb for the throttle body
  • Install fuel lines/filters
Finish it Monday?

Also, at the insistence of my local guru, removed the 3rd party dash A/C compressor that was barely mounted and had no belt.
 
  • Like
Reactions: RoadTrippin
I pulled the fuel tanks on my '78 Birch to swap over to my '78 Transmode. A PO had pulled the rear tank off the Transmode - and lord only knows what kind of engineering I'm going to find when I get that one in the air! LOL

Tanks off the Birch are FILTHY - but, at least the gunk seems to be closer to mud in consistency than to scaly rust. Wish me luck!

I documented on this forum, somewhere, how to modify a very inexpensive sending unit to work in our coaches. The units were about $40 each and just needed to be modified to work with the shallow tank depth.

Found it, here in my build thread:

Post in thread '1976 Eleganza II' https://www.gmcmotorhome.org/threads/1976-eleganza-ii.549/post-472996
 
Wasnt sure if the original plastic timing marker tab was still there, but I did find it buried on the front of the engine. Pulled it off, cleaned it up, marked 12 BTDC (403) so it would be easier to see from above/inside. Decided to replace drivers valve cover gasket as it was leaking right above the center exhaust ports before I started it up to time (Every time I've start it, I get a bunch of oil burning off the cylinder head). Pull out the replacement gaskets I bought like 2 years ago and see that they are for a Ford 5.0 :ROFLMAO:

So, pivot and finish up installing an on/off switch and new power/ground cables for front battery and finish macerator install.