i have a couple problems thinnnk they both might be from the same thing a vacume leak but idk for sure.

the truck is a 1997 4x4 blazer and when i go to put it in 4x4 the motor makes noise sounds like its in and the 4x4 light lights up but no power to the front wheels. the second issue is that the vents dont work it only blows out of the defrost no matter where the **** is set.

iam pretty sure the second issue is a vacume leak. idk if its the same leak causing both issues. could someone point me in the right dircection to look for the leak if it is. i think there are some vacume lines back by the distribitor but not sure


thanks