Firing Order (4.6L)
WARNING: This page is about a different car, the 2003 Cadillac Seville, 2003 Cadillac DeVille, and 2003 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
1-2-7-3-4-5-6-8 - The left (front) bank of cylinders are number 2-4-6-8 and the right (rear) bank cylinders are 1-3-5-7. See Fig 1.