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#1 |
Senior Member
![]() Join Date: Mar 2000
Location: Saskatoon,SK,Canada
Posts: 2,476
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Stoonboy has been looking for a stainless original gas cap to fit his 71. Bowtie got him one and it didn't fit, I gave him one from a 69 and it didn't fit, I found another that definetely fit my 72 and behold it doesn't fit his 71. Randy's seems to use a larger diameter cap. Can anybody shed any light on this mystery?
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Saskatoon, Saskatchewan Canada |
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#2 |
Account Suspended
Join Date: Sep 2000
Posts: 4,002
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71 and 72 have different sized filler necks from the 67-70's
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#3 |
Senior Member
![]() Join Date: Mar 2000
Location: Saskatoon,SK,Canada
Posts: 2,476
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OK then why does my 72 use a different cap than his 71. My truck had 62,000 original miles on it when I got it and still had the original tank in it? When I bought a new locking cap for it a couple of months ago I told them it was a 72 and they gave me the smaller cap that does not fit Randy's 71 and does fit the older stuff and my 72. Something still seems strange here.
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Saskatoon, Saskatchewan Canada |
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#4 |
Old Skool Club
![]() Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Maybe someone changed the upper part of the filler neck before he bought it. Maybe it isn't even a GM part that got used. Maybe it has been wrecked in its' past life, and the repair shop grabbed what was available and handy. This is just a guess.
My '69 still has the original stainless cap, although I installed a locking cap from NAPA, on September 11, of last year. Seems that I got spooked when I saw the lines at the gas stations when the public when nuts about gas shortages and price hikes. I didn't want anyone stealing my gas. I'm glad I was wrong.
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Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
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#5 |
"Ochre Ogre"
Join Date: Apr 2000
Location: Springfield, MN
Posts: 3,558
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half ton and 3/4 ton trucks use different filler necks. I tried a C10 cap on my C20 and it wasn't large enough to hook on the tabs. I have seen a few C10's that had the C20 tanks swapped into them too.
I think the C-10 caps are the same 67-72. The difference is whether they are vented(67-70) or sealed (71-72)caps for the emissions control.
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Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087 |
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#6 |
Registered User
Join Date: Jul 2002
Location: St. James, MO
Posts: 1,239
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Has anybody ever found one that will not let gas slop out all over the side of the cab? I've never had a cap that wouldn't, and I've used many.
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'69 Longstep K-10: 327/SM465/T-221/Closed Knuckle Dana44/12-bolt. |
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#7 |
OzarkHillbilly in Atlanta
Join Date: May 2002
Location: Douglasville, Ga. Salem, Mo.
Posts: 386
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palallin ,,,, got my chrome one at PepBoys but don't remember the brand. Since you don't have a PepBoys close to St. James (unless things have changed since I've been there) I'll stop by there and see what brand they have and post it here.
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72 custom/10 LWB 68 Longhorn C20 Custom Camper (sold) |
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#8 |
Account Suspended
Join Date: Sep 2000
Posts: 4,002
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FROM GM PARTS BOOK
CAP, GASOLINE TANK FILLER 3927086 67-72 ALL CK MODELS W/SIDE MOULDING EQUIP OR C.S.T. .....CHROME 3914958 68-72 ALL CKG MODELS EXC SIDE MLDG OR C.S.T./ 3975177 71 10-15 ALL ------------------------------------------------------------------------------- I don't see how 1/2 and 3/4 tons would have different tanks?????? They list filler necks in here too and they don't show different ones for 3/4 tons |
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