car seat weight limits

What is the age & weight limit of a child if you put them in a built in car seats (integrated seats)?

I’m trying to find out what the age & weight limit is on a child in order to put them in the built in car seats (integrated seats) of a Plymouth mini van. The year of the van is around 1998-2000. Any information is most greatful. Thanks!

Carseats, even integrated carseats, expire. I would not use them since they are so old.

Integrated carseats are also difficult to use, thus unsafe, because they are difficult to adjust and do not fit most children very well.

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