Power in 1999 Chevrolet Suburban going crazy?

Try this it worked for me, anytime you have to disconnect your battery for whatever reason you need to re-set the computer or you may experience things like your windows and locks not working properly or other problems like Andrew is having and we don't want any of those problems so try touching your battery cables together and leave them together for 5 to 15 min. Then simply connect your cables back to your battery and fire your vehicle up and check everything to make sure it is working properly,,, if not repeat the procedure it sometimes takes a second try but it has worked for me every time I have tried it