Need help my 2003 trailblazer tries to die when I turn the A/C on anybody have a clue what could be wrong. My husband and Charlie are stumped they replaced plugs and drained gas tank found water in my gas in a quart jar 1 inch on top was gas the rest water I am goin to contact Shell station on that I am mad I paid 3.75 a gallon for water. Plus Bobby replaced a cylinder. 70 dollars later and it still not running right. Any help welcome.