CADILLAC/CHEVROLET/GMC: CONCERNS REGARDING VEHICLES NO CRANK; LOSS OF HIGH SPEED LAN OR MULTIPLE U CODES IN SEVERAL MODULES; LOSS OF THE POWERTRAIN EXPANSION BUS OR MULTIPLE U CODES IN SEVERAL HYBRID MODULES; SES LAMP, SERVICE BRAKE SYSTEM MESSAGE, SERVICE HYBRID SYSTEM, ETC. *PE UPDATED 3/15/10. *PE UPDATED 3/29/10. *PE