2003 GMC Sierra missing

2003 GMC SIERRA
78,000 MILES • V8 • 2WD • AUTOMATIC
Avatar
OM
  • MEMBER
  • 1 POST
First starts run fine after a min. or two starts missing reads multipe misses. new plugs & fuel filter no help
Jan 17, 2008 at 1:49 PM
Advertisement
Avatar
BLACKOP555
  • ✓ASE Certified Mechanic
  • 10,386 POSTS
  • ASE Certified Mechanic
Change your spark plug wires, and clean out your egr valve. also check the air filter.
Jan 18, 2008 at 9:21 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.