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05-11-2019, 12:48 PM
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#1 |
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Registered User
Join Date: Apr 2019
Location: Hopewell Junction NY
Posts: 5
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Suffix Code mystery
Hello all,
Have a very original low mileage '69 C-10 that was a fairly late build in that it was delivered on 8/7/69 with an engine assembly of 06/24. What I've not seen before is the suffix code, which "U5." Anyone ever come across this before? Thanks |
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05-11-2019, 03:40 PM
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#2 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,512
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Re: Suffix Code mystery
Post a pic of the pad.
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05-11-2019, 09:10 PM
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#3 |
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Registered User
Join Date: Apr 2019
Location: Hopewell Junction NY
Posts: 5
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Re: Suffix Code mystery
Here are a couple of the pad...undoubtedly a "5" and original stamping with discernible broach marks.
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05-11-2019, 09:35 PM
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#4 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,512
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Re: Suffix Code mystery
Might be a miss stamp.
I’ve seen that before. LMC shows ‘u’ suffixes for 69 on a 307. What’s the casting number? http://www.lmctruck.com/icatalog/cb/full.aspx?Page=10 |
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05-11-2019, 09:39 PM
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#5 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,512
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Re: Suffix Code mystery
Also what transmission?
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05-11-2019, 10:08 PM
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#6 |
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Senior Member
 
Join Date: Oct 2009
Location: Godley, TX
Posts: 17,934
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Re: Suffix Code mystery
I'm goin with UB: 69 307 2bbl manual trans (clearly a 5 as I'm lookin at it, but perhaps a mis-stamp, or the "B" was broken that day (i.e. I'm with Geezer!))
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05-11-2019, 10:31 PM
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#7 |
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Registered User
Join Date: Apr 2019
Location: Hopewell Junction NY
Posts: 5
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Re: Suffix Code mystery
Motor is a 307...block casting # 3970020. Manual transmission.
Kinda of thought "UB" would be correct for it also, but had been wondering if there was some secret casting I didn't know about  Probably right about the "B" being broken that day...either that or the engine stamper had broken glasses
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05-11-2019, 10:42 PM
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#8 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,512
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Re: Suffix Code mystery
He was likely blind in one eye and couldn’t see out of the other!
BTW welcome to the jungle! |
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05-12-2019, 01:06 PM
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#9 |
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Registered User
Join Date: Apr 2019
Location: Hopewell Junction NY
Posts: 5
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Re: Suffix Code mystery
geezer#99
Thanks for the welcome! |
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05-12-2019, 01:12 PM
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#10 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,512
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Re: Suffix Code mystery
You got pics of this truck?
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05-12-2019, 05:42 PM
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#11 |
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Registered User
Join Date: Apr 2019
Location: Hopewell Junction NY
Posts: 5
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Re: Suffix Code mystery
Here are a couple pics.
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05-12-2019, 05:56 PM
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#12 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,512
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Re: Suffix Code mystery
Nice!
Clean too! Thanx for the pics! |
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05-12-2019, 07:58 PM
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#13 |
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Senior Member
Join Date: Oct 2009
Location: Godley, TX
Posts: 17,934
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Re: Suffix Code mystery
Great looking truck! Thanks for posting pics.
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05-12-2019, 08:20 PM
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#14 |
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Registered User
Join Date: Jul 2018
Location: Catskill Mountains,NY
Posts: 8,141
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Re: Suffix Code mystery
Very nice truck. I'm not all that far from you I live near the Rondout reservoir. But I am down in Wappingers falls regularly have a rental house there and a couple of my cars are in the detached garage.
__________________
Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary. |
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05-12-2019, 09:01 PM
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#15 |
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Registered User
Join Date: May 2011
Location: Northern Calif.
Posts: 3,588
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Re: Suffix Code mystery
Such a nice looking truck! SPID pic in our future?
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05-13-2019, 04:57 AM
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#16 |
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Senior Member
Join Date: Feb 2010
Location: Falls City, Nebraska "100 Miles From Nowhere"
Posts: 2,219
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Re: Suffix Code mystery
"U5" is the COPO motor...
Nice score, welcome to the mayhem...
__________________
Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American" 
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05-13-2019, 10:07 AM
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#17 |
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Senior Member
Join Date: Oct 2012
Location: Lexington, Ky
Posts: 2,113
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Re: Suffix Code mystery
WOW ! What a sweet looking truck.
Hope you plan on keeping her just the way she is. Thanks for the pictures.
__________________
Larry 84 Chevy SWB, "Roy", dark blue orig paint, 6 cyl auto, PS, 88,000 miles. 72 Highlander LWB "Olive" med olive over lt yellow, air, 77,000 miles (sold) "It's a sorry man who can't find his wife a good job" |
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05-14-2019, 07:49 AM
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#18 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,863
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Re: Suffix Code mystery
Very very nice truck. I like it as a good example of "all the in between" you could get. There were the plain Jane utilitarian trucks to all the bells and whistles CSTs. Then there were those custom tailored for what would be important to an owner and what they had no need for. Some were customer ordered, others were a dealership's idea of what they perceived their market demanded, or to offer variation in sticker price to up sell those hesitant to go all out. Mid level trim and comfort, V8, chrome appearance items, and that's it. It also shows not all truck buyers were convinced an automatic, p/s, and p/b.
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ Last edited by special-K; 06-17-2019 at 07:59 AM. |
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06-16-2019, 09:29 PM
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#19 |
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Registered User
Join Date: Mar 2019
Location: Joplin MO
Posts: 2
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Re: Suffix Code mystery
Where did you find the copo suffix? I've got a 68 with the same u5# clear as day.
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06-17-2019, 08:01 AM
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#20 |
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Special Order
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,863
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Re: Suffix Code mystery
I think he was joking. This makes it more interesting with two trucks having this code. Thanks for bringing it back.
How does GM replacement engine ID work? As in new vehicle warranty replacement.
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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06-17-2019, 11:39 AM
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#21 |
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Registered User
Join Date: Mar 2019
Location: Joplin MO
Posts: 2
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Re: Suffix Code mystery
 I know there was a couple of othe guys with the U5 CLEARLY stamped. It does seem like a mystery #, but im pretty sure it didn't happen that many times..lol I did see something about being a buick engine and with the blue/green paint, it makes me scratch my head! It is just an old c30, so a transplant is very possible.
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