Factory Wheels - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**shambles** · 07-15-2022, 04:51 PM

Hello,

I recently purchased a 1978 GMC C15. Pretty original basic truck. Could these be original wheels to the truck?

Keith Seymore · 07-15-2022, 06:14 PM

Yep.

Those are the optional aluminum wheels.

Do you have the SPID label for the truck?

PH7 = forged

N90 = cast

K

**shambles** · 07-15-2022, 07:31 PM

I do have the SPID:

That's part of why I was wondering. Doesn't seem to be any wheel options.

Keith Seymore · 07-15-2022, 07:46 PM

Yeah - somebody stuck those on there.

Would have had the base steel wheels, on (as you say) a pretty base truck.

K

Dead Parrot · 07-15-2022, 07:47 PM

Optional wheels don't seem to fit the SPID theme of basic truck.

Pure speculation:
Dealer add after purchase.

Swap from another truck where that customer didn't want the aluminum wheels. Could be a buyer wanted a well optioned truck already on the lot except for the factory installed optional wheels.

A PO added wheels well after purchase date.

**shambles** · 07-15-2022, 07:55 PM

Sort of what I thought too. The paint is the same. The SPID says solid color, but it has two tone white. I think it was dealer added the paint. Could also be previous owner.

**Corts60** · 07-15-2022, 10:48 PM

Man I really want a set of those wheels. Ive always loved them.

HOTFUN · 07-16-2022, 02:06 AM

Hard to tell from the angle but those look like the narrower version from the GM vans with the optional wheels. If I remember right they were like a 6 or 6.5" wheel where the pickups were 15x7's

**shambles** · 07-16-2022, 09:49 AM

You could be right. They look a little narrow. Is the width stamped on the back? I would like to score a set of steelies with GMC hubcaps. Although that may be awhile. I got to get this thing running first.

Pontiac1976 · 07-16-2022, 01:02 PM

shambles:

Quote:

You could be right. They look a little narrow. Is the width stamped on the back?

Yes, All GM Wheel are stamped most will be close to the valve hole 5"-10". Could be on front or back, But that style rim would be on the back.

07-15-2022, 04:51 PM	#1
shambles Junior Member Join Date: Jul 2010 Location: Goodyear, AZ Posts: 66	Factory Wheels Hello, I recently purchased a 1978 GMC C15. Pretty original basic truck. Could these be original wheels to the truck?

07-15-2022, 06:14 PM	#2
Keith Seymore Registered User Join Date: May 2009 Location: Motor City Posts: 9,226	Re: Factory Wheels Yep. Those are the optional aluminum wheels. Do you have the SPID label for the truck? PH7 = forged N90 = cast K Attached Images __________________ Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ Last edited by Keith Seymore; 07-15-2022 at 07:47 PM.

07-15-2022, 07:31 PM	#3
shambles Junior Member Join Date: Jul 2010 Location: Goodyear, AZ Posts: 66	Re: Factory Wheels I do have the SPID: That's part of why I was wondering. Doesn't seem to be any wheel options.

07-15-2022, 07:46 PM	#4
Keith Seymore Registered User Join Date: May 2009 Location: Motor City Posts: 9,226	Re: Factory Wheels Yeah - somebody stuck those on there. Would have had the base steel wheels, on (as you say) a pretty base truck. K __________________ Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/

07-15-2022, 07:47 PM	#5
Dead Parrot Registered User Join Date: Aug 2012 Location: Oklahoma City, OK Posts: 2,611	Re: Factory Wheels Optional wheels don't seem to fit the SPID theme of basic truck. Pure speculation: Dealer add after purchase. Swap from another truck where that customer didn't want the aluminum wheels. Could be a buyer wanted a well optioned truck already on the lot except for the factory installed optional wheels. A PO added wheels well after purchase date.

07-15-2022, 07:55 PM	#6
shambles Junior Member Join Date: Jul 2010 Location: Goodyear, AZ Posts: 66	Re: Factory Wheels Sort of what I thought too. The paint is the same. The SPID says solid color, but it has two tone white. I think it was dealer added the paint. Could also be previous owner.

07-15-2022, 10:48 PM	#7
Corts60 Just here to tinker Join Date: Jun 2008 Location: Holland, MI Posts: 3,697	Re: Factory Wheels Man I really want a set of those wheels. Ive always loved them. __________________ 78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold)

07-16-2022, 02:06 AM	#8
HOTFUN Registered User Join Date: Jan 2001 Location: Lincoln, Nebraska Posts: 2,145	Re: Factory Wheels Hard to tell from the angle but those look like the narrower version from the GM vans with the optional wheels. If I remember right they were like a 6 or 6.5" wheel where the pickups were 15x7's __________________ '66 CST BBW swb fleet 327 fac ac '67 CST 4x4 swb 327 stepside project '72 Cheyenne K20 50k original '72 Cheyenne Super K20 project '73 Sierra swb 4x4 frame off in paint stage '74 Cheyenne Super swb w/16k actual '71 & 72 Cheyenne K10 4x4 swb's '70 426 HEMICUDA conv SHAKER 4 sp Dana 60 '60 Impala conv 327 PG fac ac loaded 3rd owner '72 GMC K2500 4x4 '59 Apache CST BBW fleetside swb 283 '73 ElCamino SS LS1 T56 true SS bucket tach '76 ElCamino SS 52k survivor '87 Grand National 41k True 2nd to last built in 1987. '86 K30 454 SRW fleetside CA since new '88 Trans Am GTA 39k bought new 2018 DEMON plum crazy @ 840HP! "Need for speed"

07-16-2022, 09:49 AM	#9
shambles Junior Member Join Date: Jul 2010 Location: Goodyear, AZ Posts: 66	Re: Factory Wheels You could be right. They look a little narrow. Is the width stamped on the back? I would like to score a set of steelies with GMC hubcaps. Although that may be awhile. I got to get this thing running first.



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