my ecm is going bad?

2004 CHEVROLET SILVERADO
223,900 MILES • 5.3L • V8 • 4WD • AUTOMATIC
Avatar
SOONERSFAN75
How can I tell if my ecm is going bad? What symptoms should i look for?
Apr 17, 2026 at 1:37 PM
Advertisement
Avatar
STRAILER
  • ✓ASE Certified Mechanic
  • 54,487 POSTS
  • ASE Certified Mechanic
Hello,

Usually it will have many trouble codes or the ECM will not communicate with a scanner can I ask what problems you are having to make you ask this question? It can be the computer has a bad power source or ground connection. Please let me know. Ken
Apr 18, 2026 at 9:11 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.