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Re: New truck, 1961 gmc 5000
61gmc5000 #1324296 Sat Aug 31 2019 04:58 PM
Joined: May 2011
Posts: 10
New Guy
I have a '61 C60 with the 261 6 cyl.;I will dig some out but I couldn't find a pic right now. I lucked out that mine's all original bought from the farmer that had it since '64. He bought it from a local lumberyard that had several; they bought them all new and then traded the whole fleet in for new '64's with V8's. So it's almost kinda sorta a one owner. That front suspension you mentioned they only ran for two years, but parts are still available if you look. This site is worth a million $$ in the insight & info you will get! That V6 will pull anything you load up. My dad had told me that the GMC's prior to maybe '58(?) were positive ground but that they had standardized afterward. Might have more likely been when they went to 12v, which should have been '55. Interestingly, when I got my Chevy it was actually running positive ground! I called the excellent auto electric shop we have here and asked him what's the deal. He said someone had gotten it crossed up at some point and switched the polarity. Besides changing how your ignition parts wear and the danger of crossing jumper cables etc. it wasn't really hurting anything. I had called him about rebuilding the generator & regulator; he said pull them, bring them in and when you get them back switch your cables back to negative ground. I did that, all is back as it should be and running fine.

Re: New truck, 1961 gmc 5000
61gmc5000 #1324299 Sat Aug 31 2019 05:11 PM
Joined: Sep 2001
Posts: 30,801
ace skiver
In 1956 GMC small trucks went to 12v negative ground as standard equipment.
12v negative ground was an option for 1955 Blue Chip small trucks (6v positive ground was standard equipment).

Here is 1955-1959 USA GMC Blue Chip truck documentation.

Tim []
1954 3106 Carryall Suburban [] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. []
Re: New truck, 1961 gmc 5000
tclederman #1324307 Sat Aug 31 2019 05:52 PM
Joined: May 2011
Posts: 10
New Guy
Thank you tclederman , Dad passed a few years ago and I still miss picking his brain on deals like this!

Re: New truck, 1961 gmc 5000
61gmc5000 #1324422 Mon Sep 02 2019 12:23 AM
Joined: Sep 2018
Posts: 55
Wrench Fetcher
Sweet Man !

Re: New truck, 1961 gmc 5000
61gmc5000 #1336640 Fri Dec 06 2019 10:06 AM
Joined: Feb 2012
Posts: 36
Wrench Fetcher
Several years back I bought a '67 GMC V5500, v6/4spd/2spd, It was a former moving van, converted into a potato hauler. It was well used and had been sitting for years, bought it, put a battery in it, turned the key and it started instantly, quiet, no smoke, no rattles, I drove it for several years, with absolutely no trouble, loaned it to a friend who wanted to use it for his construction business, said he had a CDL driver for it, after about a year I asked for the truck back and was told it quit running, It seems the CDL driver heard it start knocking and smoking and found the oil dip stick "to be too short to reach the oil"

Re: New truck, 1961 gmc 5000
61gmc5000 #1336687 Fri Dec 06 2019 06:20 PM
Joined: Sep 2011
Posts: 797
Shop Shark
Originally Posted by 61gmc5000
The oil in the block looks fresh, makes me wonder why it was parked in the first place.

Couldn't afford to fuel it!

1960 Chevy C10 driver 235 T5 3.73 dana 44
1949 GMC 250 project in waiting
1960 C60 pasture art
G.M dealer tech since 1980 & counting
Re: New truck, 1961 gmc 5000
61gmc5000 #1336699 Fri Dec 06 2019 08:18 PM
Joined: Mar 2019
Posts: 1,137
Shop Shark
Someone put oil in it after the damage was done with no oil.

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