the zil-131 is a general purpose 3. 5 tons 6x6 army truck designed in thesoviet union, the basic model being a general cargo truck. Variants include a tractor-trailer truck, a dump truck, a fuel truck. The zil-131 also serves as a platform for the 9p138 rocket launcher, a 36-tube variant of the bm-21 "grad".

the zil-131 is part of a family of two trucks sharing identical components by zil, which also included the zil-130. Both trucks were introduced in 1967. The zil-131 6x6 has the same equipment as the gaz-66 and ural-375d. Unlike the zil-131, the zil-130 is intended for civilian use.

The zil-130/131 is still in production at the "amur" truck plant (as the amur 531340), with both gasoline and diesel engines