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Car Build Sheet Decoding

Started by Flyer, June 05, 2019, 11:51:09 AM

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Flyer

June 05, 2019, 11:51:09 AM
I ordered and received a car build sheet for my 1967 Cadillac Eldorado from GM Media Archives. The information I received did not include the decoding information needed to determine what level of option was installed on the car when it left the factory.  My question that I hope someone can answer is regarding the factory installed tires. The build sheet shows Tire Ply 2,4,6,S and my car was a code 2. Does anyone know what that designates  as to the type of tire that was installed? Thanks much. Hugh Dean

D.Smith

#1
June 06, 2019, 07:14:29 AM Last Edit: June 06, 2019, 07:16:58 AM by D.Smith
2, 4 & 6 designate brand only.  You were not guaranteed a particular brand when ordering a new car.  You could specify one, but they couldn't guarantee it due to supplier deliveries.

S indicates the optional high speed bias ply offered on the Eldorados.

Bob Hoffmann CLC#96

#2
June 06, 2019, 02:27:59 PM
Dave,
Sorry but I'm questioning part of your response. If the heading says plys, 2,4,6 are actual plys that were available. It has nothing to do with tire brand. The S info is correct.
Bob
1968 Eldorado slick top ,white/red interior
2015 Holden Ute HSV Maloo red/black interior.
             
Too much fun is more than you can have.

Flyer

#3
June 06, 2019, 05:37:39 PM
Dave & Bob - Thanks much for your response to my question. I obtained a copy of the 1967 Data book and on page B-8 it states that " optional whitewall tires are available in 2-ply, size 9.00 x 15 except on the Seventy-Five , an 8.20 x 15, 4-ply is provided. Special high speed nylon tires are available at extra charge in 9.00 x 15 size." The Calais & De Ville came with 9.00 x 15 4ply rating 2ply, the Fleetwood 75 8.20 x 15 8 ply rating 4 ply and Commercial vehicles had 8.90 x 15 8 ply rating 6 ply (page 59, 1967 Data book, Owners Manual Section). The Data book Section H, General Specifications, sub title Detailed Specifications page H-7, Describes 4 makes, U. S. Royal, Firestone, Goodrich and Goodyear, all tubeless. Size for the Eldorado is 9.00 x 15. I'm inclined to think that 2, 4, 6, are ply ratings for the tires. I have yet to determine if there was a coding for the specific tire manufacturer. Since white walls were optional I assume all the blackwalls came in a 2 ply tire. My car has an original 52 year old bias-ply blackwall as a spare. The dual whitewalls on my car are 10+ years and unsafe to drive, who knows what came on the car from the factory. Thanks much for your help. Hugh
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