2000 blazer ls/lt 4wd issue

[aksallday]

so before the gaskets blew last year i could get the transfer into low but the front axle wouldnt engage. now that its running again, i replaced my vac lines and my 4H works but when i put it in 4L it just flashes at me. any ideas? 2000 lt/ls 4wd, auto, 4button switch.

also my hvac for the feet vents do not work, it blows out the defrost instead of the feet. could the 2 be tandem issues?