2019 Seat Track Diagram
 

Does someone here have access to an official GM parts diagram that can post a photo and parts list with quantities for the rear seat track components for a 2019 express 155" wb LT? Thank you!

have you tried gmupfitter.com ?

I use this but it only covers 2003-2013. Also clearly not official.
https://nemigaparts.com/cat_spares/epc/chevrolet/

This thread might have what you are looking for
https://chevroletforum.com/forum/exp...ssenger-83721/

Thanks for the quick replies. I should have explained what I've planned. I have a cargo van, model code CG33705. I'm converting it into a camper, but want to have an occasional passenger/dog seat. I bought a takeout 2nd row 3 (small) person bench seat and seat belts from someone converting from passenger van to camper. Seller had already covered up the floor with plywood, so I coudn't see the proper seat track arrangement and hardware. I have scoured nemigaparts and parts.chevrolet for hours. There are several part numbers for the seat tracks and under-floor reinforcements. I don't really need the long track for only a single seat, so I was going to go with P/N 20870170, the short track, but there are 3 puzzling options for under-floor reinforcements.

I'm not excited about the prospect of laying on the ground with fire ants in a local salvage yard, hence the need to reverse-engineer. Can an expert here make a recommendation for attaching this factory bench seat so that it's secured well/safely?

Here are photos of the parts in question:

20870170
https://cimg5.ibsrv.net/gimg/chevrol...f057ca5965.jpg

15006091
https://cimg0.ibsrv.net/gimg/chevrol...8c88e5de67.jpg

15010452
https://cimg1.ibsrv.net/gimg/chevrol...225a9eaca3.jpg

15985849
https://cimg2.ibsrv.net/gimg/chevrol...67be896d4f.jpg

15995408
https://cimg4.ibsrv.net/gimg/chevrol...8f975c760b.jpg

https://cimg3.ibsrv.net/gimg/chevrol...bbc22a219f.jpg

Thank y'all!

You will have a job on your hands if you wish to install it the factory way.
When the van body is going down the line the first things that are applied to the body is the seat rails.
They are bolted into place with the nuts on the bottom of the van.
Then all the driveline, fuel tank, exhaust and heat shields are installed effectively preventing any access to the majority of retaining nuts.

I did the opposite. Removed all the rails except for the front section for a single seat behind the cab.
For those of us removing the rails, a 7" grinder makes quick work of the studs after cutting through the rails. The nuts then fall to the top of all the heat shields etc to drop later somewhere on the freeway.
I had to grind off the ends of the front rails for just one seat. When I applied the plywood base I cut out enough room for the pins.

https://cimg9.ibsrv.net/gimg/chevrol...ea2355918.jpeg


https://cimg1.ibsrv.net/gimg/chevrol...b24f04fca.jpeg

and don't forget ... frame .
Heat shields are thin aluminum. Easy to cut through. I just created flaps that I could bend back into place.
Fuel tank / exhaust / driveline weren't an issue at all (if you have the right extensions). I successfully removed all the nuts, except for one ... which was under a crossmember with no clearance.(the section you kept) I drilled that stud out from above. If I really wanted to, I could have removed the crossmember, but it wasn't worth it. I kept the rails 99% intact and sold them along with the seats.