Spare tire mount on 1979 GMC 35 Crew Dually - The 1947 - Present Chevrolet & GMC Truck Message Board Network

wolverinemotorworks · 04-30-2015, 11:51 AM

Can anyone tell me where I am supposed to mount the spare tire on my truck? For some reason I thought I saw one mounted underneath the rear of the bed between the frame rails. It is a 16" dually rim and tire. It was mounted by the PO on the front of the truck, but there is no way it fits in my garage with it up front. I want to keep the bed clear for hauling wood and I also want to install a receiver hitch class III. Any thoughts? Here are some pictures of my stuff.

GCncsuHD · 04-30-2015, 11:58 AM

The factory spare tire mount is under the rear. That is how my 78 K30 was, though I removed the spare tire.

tucsonjwt · 04-30-2015, 03:57 PM

I mounted my spare with the outside face facing down, so I could access the tire valve to check the air pressure. Mine is a C20 but I don't see why it would not work with a C30. I moved my pivot bolt ahead about 1.5" so the tire would clear the trailer hitch.

wolverinemotorworks · 04-30-2015, 04:25 PM

Thanks for the replies. Any chance someone has a picture of what this all looks like? I am wondering if I have to buy the hardware and have all the necessary framework in place to just bolt my spare in. Thanks again for the help.

tucsonjwt · 04-30-2015, 04:46 PM

LMC has a good diagram in their catalog online. I think you should already have the top cross rail as I think they come stock from the factory that way. Likely a local junkyard or CL will have the remaining parts. Glide out (slide out) carrier is the best but harder to find than an ivory billed woodpecker.

BTW, I spent my last year at UM A2 living in your neighborhood - Briggs Lake. Nice country to visit.

04-30-2015, 11:51 AM	#1
wolverinemotorworks Registered User Join Date: Mar 2015 Location: Brighton, MI Posts: 12	Spare tire mount on 1979 GMC 35 Crew Dually Can anyone tell me where I am supposed to mount the spare tire on my truck? For some reason I thought I saw one mounted underneath the rear of the bed between the frame rails. It is a 16" dually rim and tire. It was mounted by the PO on the front of the truck, but there is no way it fits in my garage with it up front. I want to keep the bed clear for hauling wood and I also want to install a receiver hitch class III. Any thoughts? Here are some pictures of my stuff. Attached Images

04-30-2015, 11:58 AM	#2
GCncsuHD Charlie Daniels w/ a Tq Wrench Join Date: May 2009 Location: Statesville, NC Posts: 1,570	Re: Spare tire mount on 1979 GMC 35 Crew Dually The factory spare tire mount is under the rear. That is how my 78 K30 was, though I removed the spare tire. __________________ ΜΟΛΩΝ ΛΑΒΕ 67 C10 Shortbed "Great Grandpa's Truck" I6 3 on the Tree 71k original miles 5.3 swap in the works 69 K5 Blazer-Family Beach Cruiser Project 78 K30 Dually Semi-Retired Fire Truck 350/SM465 35"s SOLD01 2500HD ECSB 6.0 4x4 5.13's 8" lift 38"s

04-30-2015, 03:57 PM	#3
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,188	Re: Spare tire mount on 1979 GMC 35 Crew Dually I mounted my spare with the outside face facing down, so I could access the tire valve to check the air pressure. Mine is a C20 but I don't see why it would not work with a C30. I moved my pivot bolt ahead about 1.5" so the tire would clear the trailer hitch.

04-30-2015, 04:25 PM	#4
wolverinemotorworks Registered User Join Date: Mar 2015 Location: Brighton, MI Posts: 12	Re: Spare tire mount on 1979 GMC 35 Crew Dually Thanks for the replies. Any chance someone has a picture of what this all looks like? I am wondering if I have to buy the hardware and have all the necessary framework in place to just bolt my spare in. Thanks again for the help.

04-30-2015, 04:46 PM	#5
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,188	Re: Spare tire mount on 1979 GMC 35 Crew Dually LMC has a good diagram in their catalog online. I think you should already have the top cross rail as I think they come stock from the factory that way. Likely a local junkyard or CL will have the remaining parts. Glide out (slide out) carrier is the best but harder to find than an ivory billed woodpecker. BTW, I spent my last year at UM A2 living in your neighborhood - Briggs Lake. Nice country to visit.



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