Was being a GMC an option??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**too much stuff** · 10-17-2022, 08:09 PM

Odd...

**Steeveedee** · 10-17-2022, 08:22 PM

General Motors Corporation?
Garage Man's Companion?

What's Z86, again?

**68bowtie** · 10-17-2022, 10:27 PM

Give Me Chevy!

**Steeveedee** · 10-17-2022, 11:17 PM

It would be interesting to see the rest of the vehicle...

**'68OrangeSunshine** · 10-18-2022, 02:47 AM

Quote:

Originally Posted by Steeveedee

General Motors Corporation?
Garage Man's Companion?

What's Z86, again?

Government
Model
Chevrolet

Looking at the VIN on the SPID, it's a C/50 with a 174'' wheelbase.

**special-K** · 10-18-2022, 08:38 AM

Get More Cash?

I don't see it as GMC since there are periods typed between each letter, I figure, to distinguish from GMC

**MJN** · 10-18-2022, 10:16 AM

Quote:

Originally Posted by Steeveedee

General Motors Corporation?
Garage Man's Companion?

What's Z86, again?

I show Z86 as Heavy Duty, 22000# GVW

Z88 is the RPO for GMC Conversion

Keith Seymore · 10-18-2022, 11:57 AM

Quote:

Originally Posted by too much stuff

Was being a GMC an option???

Yep.

K

**Gary 70 Jimmy** · 10-18-2022, 12:14 PM

Is that a 174" wheel base.

Accelo · 10-18-2022, 05:24 PM

Quote:

Originally Posted by Steeveedee

General Motors Corporation?
Garage Man's Companion?

Got Mechanic Coming

**Steeveedee** · 10-18-2022, 07:12 PM

Quote:

Originally Posted by Gary 70 Jimmy

Is that a 174" wheel base.

Yes. It's also "incomplete vehicle certification label", so was possibly going to be a bus or something like that.

**special-K** · 10-18-2022, 09:15 PM

Quote:

Originally Posted by Accelo

Got Mechanic Coming

Greatest Machine Created

**too much stuff** · 10-18-2022, 11:03 PM

Quote:

Originally Posted by Keith Seymore

Yep.

K

Can you expand on that?

Quote:

Originally Posted by Steeveedee

Yes. It's also "incomplete vehicle certification label", so was possibly going to be a bus or something like that.

This one had a fuel tank on back.

**special-K** · 10-19-2022, 08:06 AM

Quote:

Originally Posted by too much stuff

Can you expand on that?

This one had a fuel tank on back.

I'd like to know more on GMC being an option, too.

This is a medium duty cab & chassis and the 174" wheelbase is just a normal WB offered. It's only 15" longer than a 157" WB C/30

**MJN** · 10-19-2022, 09:59 AM

Based on the model number it was just a cab/chassis- an upfitter would put on a dump bed or tanker on the back.
CE56803=
C = conventional cab (S for school bus chassis, T for tilt cab)
E = V8
5= C50 series
68= 108" cab to axle (this would be '18' if it was a Chevy)
03= cab except full air brakes

Keith Seymore · 10-19-2022, 12:55 PM

Quote:

Originally Posted by too much stuff

Can you expand on that?

Sure.

The model code is not "nameplate" specific; ie C10703 or K30943 doesn't tell the operator what brand vehicle it is.

RPO Z88 is the "nameplate conversion" option that specifies that everybody needs to put GMC emblems on the truck.

Similarly, there is a "Chevrolet nameplate conversion" option (I wanna say X88) and, in later years, a Cadillac RPO (aka Z75).

All these trucks were run down the same line.

K

57taskforce · 10-19-2022, 02:25 PM

Awesome info Keith. Learn something new every day.

**too much stuff** · 10-19-2022, 10:14 PM

Thanks keith.

**special-K** · 10-27-2022, 08:13 AM

Ok, so if I understood that right, both Chevy and GMC were options since both brands were identified as one truck line. It was more like a selection than an option. You HAD TO select one or the other. There was no going without it like with an option. Like paint color, you get choices but paint is not an option, it's a selection

Keith Seymore · 10-27-2022, 09:29 AM

You could think of it that way, but they were called "options" (ie, RPOs) nonetheless.

In some cases if you didn't choose there was a default option. For example, if you didn't choose a color then you got the tan exterior picked for you.

Maybe powertrain is a better example. There was a base engine, a base transmission, and a base rear axle. If you didn't choose anything then you got the base powertrain combination, but each of those was still defined by an RPO.

Additionally - everything had to balance out when the Engineering Specifications group ran their "cross balance" report to make sure all the combinations were covered.

So for every option there had to be a contrasting "negative option" to balance it out, enabling Specs to run their computer generated report and ensure there was a part number created to cover all the proliferation of option combinations.

K

Keith Seymore · 10-27-2022, 09:36 AM

Quote:

Originally Posted by special-K

Ok, so if I understood that right, both Chevy and GMC were options since both brands were identified as one truck line. It was more like a selection than an option. You HAD TO select one or the other. There was no going without it like with an option. Like paint color, you get choices but paint is not an option, it's a selection

It's a required selection that's formally called an "option".

I guess.

(lol)

**Steeveedee** · 10-27-2022, 10:21 AM

I recall seeing that one could buy a vehicle in primer. That was in '71. Not sure why someone would do that, since it would be really difficult to get everything painted after the vehicle was assembled.

**special-K** · 10-27-2022, 10:42 AM

Quote:

Originally Posted by Keith Seymore

It's a required selection that's formally called an "option".

I guess.

(lol)

Thanks for letting me pick your brain on that. I may put them as selections in my mind to make it work for me, but I like learning how it actually was for GM and why. Keep it simple and clear. Not trying to write a novel

Mom says I've always been curious

**Ol Blue K20** · 10-27-2022, 11:10 AM

Really good info Keith, learned something new!

Keith Seymore · 10-27-2022, 12:07 PM

Quote:

Originally Posted by Steeveedee

I recall seeing that one could buy a vehicle in primer. That was in '71. Not sure why someone would do that, since it would be really difficult to get everything painted after the vehicle was assembled.

So you could have it painted in a color not normally available. If you owned your own company and wanted to paint it Petty blue, or whatever.

Back in the day - the mass production body work on a Corvette was so bad that you could not order a black car from the factory.

You could, then, get a primered car and have the prep work done and painted black after the fact.

K

10-17-2022, 08:09 PM	#1
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,708	Was being a GMC an option??? Odd... Attached Images __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

10-17-2022, 08:22 PM	#2
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,110	Re: Was being a GMC an option??? General Motors Corporation? Garage Man's Companion? What's Z86, again? __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

10-17-2022, 10:27 PM	#3
68bowtie Senior Member Join Date: Jan 2007 Location: Turlock, CA Posts: 8,413	Re: Was being a GMC an option??? Give Me Chevy! __________________ I live in California, but identify as a Texan "If a job's worth doing, it's worth doing well" Project "Little Sister" (70 c10 blue original paint refresh) Project "C10 Fever" (68 factory black 396 swb) Project "Blue Bomb" (70 c30 blue original paint refresh) Project "Vitamin C" (71 c10 orange original paint refresh)

10-17-2022, 11:17 PM	#4
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,110	Re: Was being a GMC an option??? It would be interesting to see the rest of the vehicle... __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

10-18-2022, 08:38 AM	#6
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: Was being a GMC an option??? Get More Cash? I don't see it as GMC since there are periods typed between each letter, I figure, to distinguish from GMC __________________ "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 ~

10-18-2022, 12:14 PM	#9
Gary 70 Jimmy Senior Member Join Date: Jan 2002 Location: Burghill, Ohio 44404 Posts: 3,401	Re: Was being a GMC an option??? Is that a 174" wheel base. __________________ 1972 GMC Jimmy 1/2 4X4 4wheel camper 1970 GMC Jimmy 1/2 4X4 350 1969 Chevy Blazer 1/2 4X4 307 1967 chevy LWB 3/4 396

10-19-2022, 09:59 AM	#15
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 2,967	Re: Was being a GMC an option??? Based on the model number it was just a cab/chassis- an upfitter would put on a dump bed or tanker on the back. CE56803= C = conventional cab (S for school bus chassis, T for tilt cab) E = V8 5= C50 series 68= 108" cab to axle (this would be '18' if it was a Chevy) 03= cab except full air brakes Attached Images __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

10-19-2022, 02:25 PM	#17
57taskforce All about them K’s Join Date: Jun 2014 Location: Farmington, New Mexico Posts: 6,238	Re: Was being a GMC an option??? Awesome info Keith. Learn something new every day. __________________ Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's ‘87 IROC-Z all original 50K mile survivor TPI 305 IROC Blue ‘10 Camaro 2SS/RS Aqua Blue Metallic #93 -version 2.0

10-19-2022, 10:14 PM	#18
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,708	Re: Was being a GMC an option??? Thanks keith. __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

10-27-2022, 08:13 AM	#19
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: Was being a GMC an option??? Ok, so if I understood that right, both Chevy and GMC were options since both brands were identified as one truck line. It was more like a selection than an option. You HAD TO select one or the other. There was no going without it like with an option. Like paint color, you get choices but paint is not an option, it's a selection __________________ "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 ~

10-27-2022, 09:29 AM	#20
Keith Seymore Registered User Join Date: May 2009 Location: Motor City Posts: 9,150	Re: Was being a GMC an option??? You could think of it that way, but they were called "options" (ie, RPOs) nonetheless. In some cases if you didn't choose there was a default option. For example, if you didn't choose a color then you got the tan exterior picked for you. Maybe powertrain is a better example. There was a base engine, a base transmission, and a base rear axle. If you didn't choose anything then you got the base powertrain combination, but each of those was still defined by an RPO. Additionally - everything had to balance out when the Engineering Specifications group ran their "cross balance" report to make sure all the combinations were covered. So for every option there had to be a contrasting "negative option" to balance it out, enabling Specs to run their computer generated report and ensure there was a part number created to cover all the proliferation of option combinations. 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/ Last edited by Keith Seymore; 10-27-2022 at 09:37 AM.

10-27-2022, 10:21 AM	#22
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,110	Re: Was being a GMC an option??? I recall seeing that one could buy a vehicle in primer. That was in '71. Not sure why someone would do that, since it would be really difficult to get everything painted after the vehicle was assembled. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

10-27-2022, 11:10 AM	#24
Ol Blue K20 Proprietor of Dale's Corner Join Date: Nov 2012 Location: Vacaville , CA Posts: 15,834	Re: Was being a GMC an option??? Really good info Keith, learned something new! __________________ "Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man



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