CHEVROLET, GMC · 2013-08-01
This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0087, P0461, P2066, P128E, P2632, P2633, P2634, and P2636. Technician should ensure that the scan tool is up to date with version 33.003 or higher then continue with published Service Information diagnostics for the Diagnostic Trouble Codes that are set.