The feel is more alchemist archetype or a hybrid. Not enough special features to make it stand out in its own, but I like the concept. I wonder if Investigator wouldn’t be a better chassis to start with. Guerrilla feels weaker than either due to lack of spells/formulae.
Skills: add bluff, climb, knowledge (local), swim
These guys are adaptable and can blend in to the crowd.
Bombs: I think they should get scrap bombs and add rocket discovery.
Survivalism: good flavor but needs more oomph. How about using craft to give makeshift bonuses or modifications to weapons and armor that are more limited like minutes/level? Use a pool of survival/makeshift points?
Crude combatant: make this a trick. Unless the guerrilla chooses dirty tricks, this is useless.
Then add a truck to use level as bab when performing dirty trick. Or stack effects with improvises arsenal.