1990 GMC Sierra

1990 GMC SIERRA
Avatar
DREW86
  • MEMBER
  • 1 POST
Engine Mechanical problem
1990 GMC Sierra V8 Two Wheel Drive Automatic

I need to know the spark plug firing order i think their are some wires crossed
Dec 5, 2008 at 4:20 PM
Advertisement
Avatar
CMAT22
  • MEMBER
  • 2 POSTS
i have a 90 seirra too man and the order is 1-8-4-3-6-5-7-2
Feb 3, 2009 at 10:43 PM