There is no Joie Litetrax car seat, I mean, the car seat has a name - I am assuming you don't know the model name? The Joie Litetrax normally comes with the Joie Gemm car seat.
In any case, a Joie Gemm car seat should fit on most Joie strollers (not on the Joie Mirus or Joie Muze though). Better said, the Joie Gemm fits Joie car seat adapters (with this U-shaped side at one end) - and will fit on strollers that have the option to accept a car seat WITH those ADAPTERS.
Btw, the car seat will also fit on most strollers that have the option of having Maxi-Cosi/Cybex car seat adapters, as the attachment system is the same.