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| | | Forums66 Topics128,095 Posts1,056,480 Members48,444 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Jan 2010 Posts: 126 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2010 Posts: 126 | I was cleaning up under the cab before I weld in a new floor pan and found some numbers stamped on the frame. They are on the drivers side, right under and slightly behind the front cab mount. Its not the VIN, anybody know what they are and what they mean?
Here's the numbers:
3881391 120 5 19 113
Thanks
| | | | | Joined: Feb 2010 Posts: 38 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2010 Posts: 38 | Pretty sure part of that SHOULD be the VIN. Is your cab and frame original?
The glass is twice as big as it needs to be.
| | | | | Joined: Jan 2010 Posts: 126 Wrench Fetcher | | Wrench Fetcher Joined: Jan 2010 Posts: 126 | The VIN stamped on the frame by the engine matches the one on the cab. The number under the cab doesn't have any elements in common with the VIN. | | | | | Joined: Feb 2010 Posts: 38 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2010 Posts: 38 | Yeah... I remember that from mine a while age now. Maybe they are like the "buck tag" on other cars n trucks. Has to do with factory options and assembly line info.
The glass is twice as big as it needs to be.
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