i recently got a 04 z71 tahoe used, w/ 50,000miles. i might just be going out of my mind, but it seems like it's started to shift different? i feel like it should have more pep, or it did have more pep?

when i full throttle it, it kicks. but just acclerating from0mph seems sluggish, like its taking too long to shift to the next gear... anyone else have this problem or know what it could be? or am i just imagining things?

i've already had to take it to the dealer a couple of times to for some fixes, but i want to make sure it's something before i bring it back again, and before they start to hate me.

thanks, joe.