VAT Number Help
Instructor
Joined: Oct 2005
Posts: 108
Likes: 0
From: Acton, MA 1990 ZF6 Coupe, Z51
In the 1990 you can go into CCM diagnostics and get the VATS "Key counts" then reference a chart in the factory service manual which tells the key code....Believe this works in the 91's too......
1st Gear
Joined: Feb 2025
Posts: 1
Likes: 0
How do you find it? I went to a dealership and they told me they can’t find it
I lost the keys to my 1999 corvette and I went to a dealership but even with the vin they said they can’t find the vat number. That I have to tow the car in and pay them around 200-300 to figure it out. Can someone help me?
Instructor
Joined: Apr 2023
Posts: 131
Likes: 25
However, the VATS system is to my knowledge almost the exact same. Do you have a spare key? Per above, measuring the resistance and matching to the table would be the way to go. For a table, just Google "C5 Corvette Vats Table".
Plenty of places to order replacement key blanks from, and just about any hardware store will cut it for you.
If you don't have a spare to measure, you may be better off replacing the whole lot with matching keys, also mentioned above.
Team Owner
Joined: Sep 2003
Posts: 25,393
Likes: 2,741
That doesn't sound correct - they won't generally do it for free but would require you to walk in with ID and registration. Some lock shops have relationships also and could help you. The resistance code is supplied with a key request from GM. The code might not work but the resistance code is seldom changed from original. Walk into a dealer with your ID and registration.
