(Lbz 2007 2500hd classic 4x4 ) So I let my brother use my truck and he called me and said your truck won’t start . So I told him to try the remote key start and it turned on put in the key and worked .After I inspected it I turned it off and turned it back on with the key everything was working until I drove home from work I noticed the AC control kept turning on and off and also my emergency brake light and ABS . So I get home try to turn the key and nothing then I tired the remote start and it cranks back on even the ac control and no dash lights ,that is until I turn the key the ac control immediately turns off and the lights are back on.scanned it and it says no connection to Tcm ,egr lowflow , and Maf. Which I replaced the maf right away . I’m stuck any idea what it could be . (First time posting ) sorry for the long post .