So i have an 06 trailblazer, 74k miles on it, and it runs great and drives nicely but going up hills itll almost bog out. My rpms will just slightly go up and down and the vehicle will kind of rock. Then i put some more gas to it and it climbs the hill fine. Idk if this is an issue or sounds like im not attacking the hills well enough. Autmoatic, too

 

Have you checked or replaced your fuel filter? Can sometimes be the problem...

 

Is this going up hills from a stop or does it bog out at speed?