Hi Everyone,...I Hope We Can All Share Our Grand Prix EXPERIENCES & Learn Some Relavent FIXES Also..!? I OWN 2 IDENTICAL '08 ( Last Model Made ) - Grand Prix's, 3.8 Liter,6 Cylinder...& Have a "Check Engine" Light on Both of Them That Came on @ ARound 60,000 Plus Miles...Anyone Tell Me ....How to Turn off This Light? I Checked the Codes That Came Up & Replaced The Gas Cap as Was Indicated...But The Light is "Still ON"...PLEASE HELP,...Anyone..???