Per info from GM Inside News:
Deletions
(GBV) Cyber Gray Metallic exterior color
(GLC) Viridian Joule exterior color
(GTS) Blue Topaz Metallic exterior color
(AFG) Jet Black and Spice Red seats with Dark accents interior
(FIF) Premium door trim
(PCM) Comfort Package
(NK5) Comfort grip steering wheel
New Features
(GLJ) Ashen Gray Metallic exterior color
(GWX) Brownstone Metallic exterior color
Changes
(N30) Leather-wrapped steering wheel is now standard
Charge port door is push to open
(KA1) Driver and front passenger heated seats is now an available option for Cloth interior, as well as included with (PCQ) Premium Trim Package
(AFA) Jet Black seats interior accents changed from Ceramic White to Dark accents
(AFD) Jet Black and White seats are now all Jet Black seats
Deletions
(GBV) Cyber Gray Metallic exterior color
(GLC) Viridian Joule exterior color
(GTS) Blue Topaz Metallic exterior color
(AFG) Jet Black and Spice Red seats with Dark accents interior
(FIF) Premium door trim
(PCM) Comfort Package
(NK5) Comfort grip steering wheel
New Features
(GLJ) Ashen Gray Metallic exterior color
(GWX) Brownstone Metallic exterior color
Changes
(N30) Leather-wrapped steering wheel is now standard
Charge port door is push to open
(KA1) Driver and front passenger heated seats is now an available option for Cloth interior, as well as included with (PCQ) Premium Trim Package
(AFA) Jet Black seats interior accents changed from Ceramic White to Dark accents
(AFD) Jet Black and White seats are now all Jet Black seats