Peg perego book stroller. I can't seem to move the seat back to upright position.

SOURCE: Peg Perego Triplette 2005 model

Peg Perego

LINK: http://www.pegperego.com/page.php?sid=adbdaeb9e5e15cdd9498e53c732b46b7&pageid=UCGRP009&dwt=IS&dwf=05

For residents of USA and Mexico only.

3625 Independence Drive
Fort Wayne, IN 46808
Main Office: (260) 482-8191

Office Hours: Monday - Friday 7:30am to 4:30pm EST

USA Customer Service Hours:
Monday - Friday
8:00am to 8:30pm EST

USA Infant & Toddler Product Customer Service: (800) 671-1701
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USA Customer Service Fax: (260) 471-6332
USA Customer Service Email: CLICK HERE
MEXICO Servicio Al Cliente: 01-800-710-1369

SOURCE: Would you please provide me with instructions for reclining the seats on my Peg Perego triplette stroller?

PLEASE GIVE ME YOU MAKE AND MODEL SO I CAN DO SO, SO I CAN DIRECT YOU THE RIGHT WAY STEP BY STEP. THANKS

SOURCE: peg perego car seat on a stroller?? how??

Peg Perego car seat is only compatible with peg perego strollers.
It is not clear from your very laconic question what you really need.

If you need to install a peg perego car seat on a peg perego stroller, then just look into the manual, OR, if you don't have one, search for it online.
In case you need to install a peg perego car seat onto any other stroller, I doubt a lot, it is possbile...
I am in an opposite situation.
I have got a peg perego stroller, but another type of the infant seat. After long searched online, we understood that once you buy a stroller, you almost always have to buy a car seat from the same company, or you won't be able to use it as a travel system (which is exactly how we are going to deal with the situation)