About DTD

What is DataTagDecoder.Com?

DataTagDecoder.Com is a unique site that provides the ability for the classic car collector and enthusiasts to decode cowl tags on most General Motors vehicles (except trucks) from 1964 - 1972.
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Announcements Page

FEB 14, 2022 - Buick Paint and Accessory Codes	Paint Code Corrections and Additional Accessory Codes Added for Buick
DEC 20, 2021 - Added Body Color and Interior Codes	Added Body Color and Interior Codes for Oldsmobile
SEP 26, 2021 - Cadillac Paint Codes	Added Cadillac Upper and Lower Paint and Top Color Code for 64-67
SEP 19, 2021 - Cadillac ACC Codes	ACC Code corrections and duplicate removal
SEP 8-12, 2021 - Added Codes	Major Code Updates for All GM Divisions
SEP 6, 2021 - Added Codes	Added Accessory Codes for Cadillac and Pontiac
JUL 27, 2021 - Added Codes	Added codes for Buick.
JUL 22, 2021 - Minor page tweaks and performance updates	Improved page and site performance changes.
JUL 15, 2021 - Added RPO Codes for Oldsmobile	Added several "W" Engine Codes.
JUL 15, 2021 - Our RPO Decoder is available as a Beta Version	Try it out and tell us what you think. You can read about it by clicking here.
JUL 9, 2021 - Updated Links Page	Added a number of Owner and Forum Links
JUL 2, 2021 - DataTagDecoder.Com Relaunch	After an unplanned absense we're back! We've also included a new GM RPO Decoder. Check us out and tell us what you think!

Ohio Man Busted for Trying To Sell Cloned Chevelle Z16

Bobby Patton thought he'd figured out a way to make a few bucks off a 1965 Chevelle. He'd punch out his own trim and VIN tag, throw in a 396 and some badges, and stick the car up on a popular online auction site for a quick $100,000. Read More>>

Rebodies, Replicas & Tampered Numbers

Greek historian and writer, Plutarch posed a question, over two thousand years ago, that has continued to confound philosophers. “If the ship on which Theseus sailed has been so heavily repaired and nearly every part replaced, is it still the same ship — Read More>>

Rebodies: What’s The Big Deal???

I’ve been getting quite a few calls lately seeking information on re-bodied vehicles. The term “rebody” is a term of art used throughout our hobby to denote a vehicle whose original factory body has been replaced with another “donor” body. Read More>>

Judge and Jury Find Against Seller

...“numbers matching” must have its original trim tag. During the course of the litigation, it was discovered that the seller had not only changed the trim tag, but had also kept the original trim tag without ever previously disclosing... Read More>>

Opinion - Replacing Cowl Tags

As some of you noticed I opened a poll asking the question if it's ever ok to replace a cowl tag. The responses are coming in little by little but I wanted to convey my personal opinion about this practice and what people... Read More>>

How To Spot A REAL 1970 Chevelle SS

The 1970 Chevelle SS is not only one of the most sought-after cars in the world, but it's also one of the most faked and cloned as well. There is nothing worse than hearing about a fellow car enthusiast purchasing a bogus car and becoming a victim of fraud. Read More>>