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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15201
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I have 04 silverado with 5.3 no start and no comm with scan

Customer Question

i have 04 silverado with 5.3 no start and no comm with scan tool thinking its the ecm
Submitted: 1 year ago.
Category: Chevy
Expert:  Jerry Newton replied 1 year ago.

Will your scan tool communicate with any other modules on the truck? I always like to eliminate a scan tool problem.

If you think it's an ECM, you'll have to check power and ground at the appropriate pins of the ECM before replacement. It's much more likely that you have a fuse that's open, preventing communication.