i took my truck to the dealer for injectors because 2, 4, and 7 were out of balance. they had it for 8 days. when i got it back, i drove it for about 60 miles and shut it off. came back in an hour and it was acting like it was hydro locked. dealer towed the next day and told me that #8 injector was dumping too much fuel. the jack ass stood behind the "faulty part" and i had too rent another car.(i forgot too add i had rented a car for 8 days that cost me 473$ to have them work on it in the first place). this is another reason i try to work on my own **** as much as i can. driving a 2 door 4 cylinder cobalt really *****ing frustrated