just purchased a 2011 chevy equinox?

[Dawn M]

i just bought a 2011 chevy equinox. it only has 800 miles on it, but i have noticed every once in awhile when im sitting at a light, it seems to very lightly "jump" or sputter. chevrolet said nothing is wrong, but in you opinion is this normal or should i get a second opinion?

[Bill]

theres nothing normal about a car just jumping when its in idle. get it checked out