I thought I would mention this here as an FYI as I wasn't aware of this until a couple years ago. We have two kids, 6 and 9. They are old/big enough now that we have them in the basic booster seats. One of the hard things for them is to get the seat belt on themselves while sitting on that 3" or so foam block. However if you go to the dealer's parts department and ask for seatbelt extenders they will give them to you for free. Sometimes they ask you how long of an extender you want and some other information. For some reason in our 03 Avalanche they had some mid year change in the seatbelts because they needed to know if the release button said "PRESS" or not. With our Denali they just asked year and which row they were for. Maybe there is a difference between the front and mid/rear rows. They had to order them but 2 days later I got a call that the 5 extenders I requested were in and no charge when I picked them up. This is also the case with other makes of vehicles. We picked them up for free from VW for our Jetta. I believe there is a federal requirement to supply them when someone is too large to get a belt around them.
The extenders do not change the routing of the belt they just extend the buckle about 6" so there isn't a positioning issue with our kids. You may want to be cautious if they are just transitioning into this style seat and ensure the placement is right on their body. Technically it introduces another point of failure but they are manufactured by the auto maker so I would trust it more than the ones you can buy from ebay or Amazon. Besides why buy it when you can get them for free.
The extenders do not change the routing of the belt they just extend the buckle about 6" so there isn't a positioning issue with our kids. You may want to be cautious if they are just transitioning into this style seat and ensure the placement is right on their body. Technically it introduces another point of failure but they are manufactured by the auto maker so I would trust it more than the ones you can buy from ebay or Amazon. Besides why buy it when you can get them for free.
