What does "durable" mean in your lexicon?
ANY gun can be deliberately damaged beyond function so I have to assume that when you say "durable" you mean a rifle that will hold up well in the environs of a truck.
Bolt rifles are nice but out-dated.
The ONLY choice left is whether you favor the AK or AR platform.
IF you favor AK then you're talking 7.62x39 simply because it's the least expensive, readily available standard.
IF you favor AR then the RIGHT ANSWER is the .300 AAC (Blackout).
The AR is the better "platform" without any doubt. It's far more accurate, had superior ergonomics, and when properly put together and wrung out is as reliable as any AK. Also, the .300 AAC is SUPERIOR to the 7.62x39...not in brute force, but in "finesse" which has ALWAYS been the reason the AR platform supercedes the AK platform!
If you're thinking SHTF, end of the world stuff then you would want to go 5.56 NATO, but IF you're thinking hunting, and maybe the world ends while you're out and about, the .300 AAC is THE choice, though you will have to load your own if you don't want to be price gouged. IF you don't reload then the ONLY caliber in the AR platform for you is the 5.56 and you WANT the 5.56 over the ".223."
Whatever rifle you have in your truck will be THE rifle you'll have when you discover the world has ended...a 4 shot, bolt-action, versus a 20-100 shot semiautomatic...same money, your choice.