I have a 2010 Avalanche - FSCM 20850927. I have a new one to install and used 4.8.7 MPVII to write entire. Did not work. Tried to Read all again but I do not get an option on the FSCM when reading or writing. Do I need to have it programmed by someone with a Tech tool (?) or can it be done with HPT? Thanks
