C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Trim tag question '78

Thread Tools
 
Search this Thread
 
Old Feb 7, 2019 | 10:14 PM
  #1  
eodtech72's Avatar
eodtech72
Thread Starter
Instructor
15 Year Member
All Eyes On Me
 
Joined: Dec 2009
Posts: 113
Likes: 7
From: FL
Default Trim tag question '78


I can't seem to find what the 23U code is? Any help is appreciated.

Thanks,
Tim
Reply
Old Feb 7, 2019 | 11:48 PM
  #2  
eodtech72's Avatar
eodtech72
Thread Starter
Instructor
15 Year Member
All Eyes On Me
 
Joined: Dec 2009
Posts: 113
Likes: 7
From: FL
Default

Anyone? Going to look at this car Saturday and just wanted to decipher that code.... Thanks
Reply
Old Feb 8, 2019 | 02:53 AM
  #3  
eodtech72's Avatar
eodtech72
Thread Starter
Instructor
15 Year Member
All Eyes On Me
 
Joined: Dec 2009
Posts: 113
Likes: 7
From: FL
Default

Could the 23 be a type-o and supposed to be a 13? There was no 23 paint code for 78, and only Anniversary Ed. or Pace car 2-tone right? So is it originally a 2-tone Ann. Ed. with a mistake on the tag? This is not a high priced car and is now painted black. Just curious if this has been seen before....
Reply
Old Feb 8, 2019 | 03:07 AM
  #4  
Greg's Avatar
Greg
Just another Corvette guy
Supporting Lifetime Gold
20 Year Member
 
Joined: Feb 1999
Posts: 8,518
Likes: 3,865
From: Palm Springs, CA.
Default

You might want to contact someone at the NCRS site for this code info.
Reply
Old Feb 8, 2019 | 04:20 AM
  #5  
hunt4cleanair's Avatar
hunt4cleanair
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2002
Posts: 5,236
Likes: 898
From: Myrtle Beach SC
Default

Have to agree with eod...it should have been a 13U to compliment the 07U. Wasn't caught...not a big deal back then. But car looks repainted with black or dark blue, it has a dark blue cloth interior. Look for signs of overspray on the chassis can confirm the repaint. Also, you have the buildsheet it will show the correct paint and trim codes.

How many miles? Can you get a photo of the entire tag including the build date? I'm an instructor at the NCRS judging retreat and we like to include these production anomalies to show...there are no absolutes!
Reply
Old Feb 8, 2019 | 11:58 AM
  #6  
BKarol's Avatar
BKarol
Melting Slicks
Veteran: Army
20 Year Member
Liked
Community Favorite
 
Joined: Sep 2004
Posts: 3,227
Likes: 670
From: Northeast
Default

Here is a pic of the trim tag on a 78 Silver Anniv paint job for comparison, build date May 5th. (I05). Looked at another silver anniv paint car and it shows a 13 instead of 23 for a May 18th build. You have a May 30th pictured? I30?

Last edited by BKarol; Feb 8, 2019 at 01:53 PM.
Reply
Old Feb 8, 2019 | 12:13 PM
  #7  
mvftw's Avatar
mvftw
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Feb 2003
Posts: 2,330
Likes: 6
From: Long Island NY
Default

I believe that 'U' means Upper Body (paint)
Reply
Old Feb 8, 2019 | 02:29 PM
  #8  
BarryB72's Avatar
BarryB72
Drifting
Photogenic
Photoriffic
Shutterbug
Top Answer: 1
 
Joined: Nov 2013
Posts: 1,806
Likes: 258
From: Dublin Ohio
Default

[quote=hunt4cleanair]Have to agree with eod...it should have been a 13U to compliment the 07U. Wasn't caught...not a big deal back then.

I can just see the guy that made the tag saying "oops. Hey fellas I invented a new paint code.....Next. "

Last edited by BarryB72; Feb 8, 2019 at 02:30 PM.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old Feb 8, 2019 | 03:59 PM
  #9  
eodtech72's Avatar
eodtech72
Thread Starter
Instructor
15 Year Member
All Eyes On Me
 
Joined: Dec 2009
Posts: 113
Likes: 7
From: FL
Default

It is date code I30 for May 30th and the VIN falls in the correct sequence batch. It has been repainted black. It's an L82 4spd, I'll be picking it up tomorrow and post some pics.
Reply
Old Feb 8, 2019 | 04:34 PM
  #10  
BKarol's Avatar
BKarol
Melting Slicks
Veteran: Army
20 Year Member
Liked
Community Favorite
 
Joined: Sep 2004
Posts: 3,227
Likes: 670
From: Northeast
Default

Good luck and have some fun with the car. Hard to go wrong with a L82 4spd

Did you check the c3 registry to see if it is listed. Sometimes there will be some added information on the car.

https://www.c3registry.com/index.php?job=ShowRegistry
Reply
Old Feb 14, 2019 | 12:15 PM
  #11  
eodtech72's Avatar
eodtech72
Thread Starter
Instructor
15 Year Member
All Eyes On Me
 
Joined: Dec 2009
Posts: 113
Likes: 7
From: FL
Default Update

Sent off for the invoice and got a reply that it was not available because it was an export vehicle?? Guess I'll hope and try to find a build sheet....
Reply
Old Feb 14, 2019 | 12:48 PM
  #12  
CA-Legal-Vette's Avatar
CA-Legal-Vette
Race Director
20 Year Member
All Eyes On Me
Loved
Community Favorite
 
Joined: Jul 2004
Posts: 12,706
Likes: 329
From: Scottsdale Arizona
Default

Originally Posted by eodtech72
Sent off for the invoice and got a reply that it was not available because it was an export vehicle?? Guess I'll hope and try to find a build sheet....
Interesting! May well explain the mismatched paint code. Guessing it was an export to Canada. I’m not familiar with this year specifically but there were instances where different colors were offered in Canada for a specific year.
Reply
Old Feb 14, 2019 | 01:15 PM
  #13  
Greg's Avatar
Greg
Just another Corvette guy
Supporting Lifetime Gold
20 Year Member
 
Joined: Feb 1999
Posts: 8,518
Likes: 3,865
From: Palm Springs, CA.
Default

Originally Posted by CA-Legal-Vette
Interesting! May well explain the mismatched paint code. Guessing it was an export to Canada. I’m not familiar with this year specifically but there were instances where different colors were offered in Canada for a specific year.
I was not aware of this?
Reply
Old Feb 14, 2019 | 06:36 PM
  #14  
jb78L-82's Avatar
jb78L-82
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2007
Posts: 7,456
Likes: 977
From: RI, Now Franklin/Nashville TN
Default

Excellent L-82 4 speeds are terrific C3's, as good as it gets with the SBC's ...X2 if it has the sport/gymkhana suspension...look for a 7/16 inch rear sway bar in the rear wheel well for sport suspension confirmation! front bar will be 1 1/8 inch with the sport suspension as well
Reply
Old Feb 14, 2019 | 08:40 PM
  #15  
kenpeindl's Avatar
kenpeindl
Racer
 
Joined: Dec 2014
Posts: 402
Likes: 44
From: Pittsburgh PA
Default

According to the master GM RPO code list 23U is a paint code.
23U : PRIMARY COLOR, EXTERIOR, MED MAUI BLUE MET (91)
Along withe 07M the car would have a blue over silver which I've seen on Camaro's and Firebird's.

According to the NCRS judging guide there were special order for paint colors other than those standard corvette colors.

Otherwise I would say it was a typo.

Last edited by kenpeindl; Feb 14, 2019 at 08:47 PM.
Reply
Old Feb 14, 2019 | 09:19 PM
  #16  
CA-Legal-Vette's Avatar
CA-Legal-Vette
Race Director
20 Year Member
All Eyes On Me
Loved
Community Favorite
 
Joined: Jul 2004
Posts: 12,706
Likes: 329
From: Scottsdale Arizona
Default

Originally Posted by Greg
I was not aware of this?
I’ll hunt for an example.
Reply
Old Feb 15, 2019 | 12:41 AM
  #17  
Greg's Avatar
Greg
Just another Corvette guy
Supporting Lifetime Gold
20 Year Member
 
Joined: Feb 1999
Posts: 8,518
Likes: 3,865
From: Palm Springs, CA.
Default

Originally Posted by CA-Legal-Vette
I’ll hunt for an example.
Thanks CA.
Being as Canada only got about 10% of the Corvettes made in any particular year, this could, potentially make for some very rare (and interesting) cars.
G.
Reply

Get notified of new replies

To Trim tag question '78

Old Feb 15, 2019 | 07:25 AM
  #18  
kenpeindl's Avatar
kenpeindl
Racer
 
Joined: Dec 2014
Posts: 402
Likes: 44
From: Pittsburgh PA
Default

The pics below are from the NCRS Judging Guide ver3 for 78-79 with regards to exterior paint. You were able to order a color other than a corvette color. Even order one with primer paint only. With your interior color (29C) would be Dark Blue Cloth your trim tag would make sense. I would say you have a rare car since very few special orders were made according to NCRS.


Last edited by kenpeindl; Feb 15, 2019 at 07:29 AM.
Reply
Old Feb 15, 2019 | 09:48 AM
  #19  
eodtech72's Avatar
eodtech72
Thread Starter
Instructor
15 Year Member
All Eyes On Me
 
Joined: Dec 2009
Posts: 113
Likes: 7
From: FL
Default


Does anyone know of a way to get any information similar to the invoice? Did Canada cars get records sent somewhere? I'll be on the lookout for a build sheet but not really going to take the car apart right now. Just finished compounding, polishing and waxing it. It's a driver quality paint job but a great 10 footer. Will get better as I touch up several chips also. I've driven it to work the last couple of days and it runs great... shifter is a little sloppy in neutral but I'll correct that eventually. Pic is from Wednesday....
Reply
Old Feb 15, 2019 | 01:30 PM
  #20  
kenpeindl's Avatar
kenpeindl
Racer
 
Joined: Dec 2014
Posts: 402
Likes: 44
From: Pittsburgh PA
Default

The only thing you can get for your 78 is the dealer invoice. My understanding was that most of the build sheet records were lost in a fire some years ago. The only other place to look would be the tank sticker if it is still there. I ordered the vehicle invoice for my 78 which listed the options along with the color much like a build sheet. Worth the $50 it cost me.

http://www.gmmediaarchive.com/?page=1
Reply



All times are GMT -4. The time now is 04:35 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE