my 01 tahoe running, rought idle as its running.
01 tahoe with 5.3 4wd, as its running it will start to run rough, feels like a misfire, but not check engine light, but as soon as i accelerate it corrects itself, and runs smooth, it has 140k on it, only issue ive had is bad fuel pump 2yrs ago, its been really good to my family.