Truck leaning on passenger side

[Jared91]

Ive got a 2014 silverado 1500 and a couple months ago i was hit in my front passenger wheel and that put me into a ditch preety hard. The body work has all been done but my truck now is sitting an inch lower on the passenger side the shocks are not leaking and ive had a couple different allignment shops look at it and nobody can seem to figure out why its leaning. The only thing i could think of is the shock so im getting that replaced but i was wondering what you guys all think it could be if not.