Britax Frontier 03 Tahoe SBP install problems

[JoannaJ]

I was very excited today to purchase a Frontier and use it in place of my Parkway. Now 3 hours later, I am sweaty and frustrated. My 5.5yrold who is 50 lbs will be using it (maybe?) in the 3rd row of our '03 Tahoe. I have to use the SBP since the belt isn't long enough for LBP and there is no latch (and she is too big for latch). I have it installed, but I am not the happiest with it. It isn't as rock tight as my FF Marathon or RF Boulevard. It slides about 1/4-1/2inch side to side. On a scale of 1-10, I feel it is an 8. My others I feel are a 10. I have the top tether attached also. Now the seats leans left. Is that safe? Any suggestions?

[safeinthecar]

Up to 1 inch of movement is safe, as is a slight tilt, as long as the kiddo is comfortable.

A tip for installing the Frontier easier, recline the vehicle seat while you tighten the seal belt (if you can) then put it back upright.

[JoannaJ]

I read on here about the recline. Unfortunatly, my 3rd row doesn't recline.
BTW...I love your quote on the bottom of your response. :)