× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: 05 silverado can't program ecm error codeE4399
Posted to Technical Discussion Forum on 2/27/2024 1 Reply

[...trimmed text...]

Delco reman or aftermarket? Delco flashes theirs back to an "off the shelf" calibration but the aftermarket remans will still be programmed for what they came out of.

No GM ECM comes "empty", they ... Login to read more.

1 Replies Received (View Replies)