Program ECM Error E4491/E4423 – 2016-2019 All GM Passenger Cars and Light Duty Trucks
NHTSA ID Number:Â 10143429 Manufacturer Communication Number:Â PIP5373B Summary This Preliminary Information communication provides the technician with steps on how to program an Engine Control Module when getting a Service Programming System error code E4491 or E4423. In some cases Techline Customer Support Center may need to be contacted to resolve the issue.
