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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 am working on a 2005 Chevy 2500 HD 6.6L. Was running fine,

Customer Question

I am working on a 2005 Chevy 2500 HD 6.6L. Was running fine, guy parked it left something on, tried to boost it ( Crank but no start). I put my snap on scanner on and pulled these codes P0090, P0621, P0622, P0671, P0673, P0676, P0677, P0678, P0700, U0101, U0105 & U0106. I cleared the codes and tried to fire again ( no luck ). I put the scanner on again and pulled these codes, all the glow plug codes 71,73,76,77, 78 & U0105 Lost communication with fuel injector control module. Any thoughts?
Submitted: 1 year ago.
Category: Chevy
Expert:  Jared D replied 1 year ago.

Check the 25 amp FICM fuse first.

If that looks ok you will need to do some circuit testing to see if a wire has rubbed through somewhere. Do you have a multi-meter?