at least BARNETT 300 ,they cover limbs on warranty.
HORTON is 3 yrs..
for what these bows cost new, all should at least cover 1 set of limbs no matter how old ..

as for gmc truck, i supervised a gm loading dock 30 years ago..
i saw trucks with the frames all rusted being shipped out to dealers,terrible way to run a business.

i found out that the salt from ocean was rusting the frames before they shipped them out ..

so, if you can get your truck from plant not near ocean, that may help....