heating/air conditioning temperature and air delivery mode door actuators on 1999 GMC Suburban 1500

heating/air conditioning temperature and air delivery mode door actuators: the air does not blow as hard as it should, how do i service this. is there a vac hose that can be replaced?

by in Germantown, TN on August 10, 2009
1 answer
ANSWER by , August 14, 2009
You may have a blower motor fault or the mode doors may not be working correctly. Is the air coming out of the proper vents at the proper time? If the air is coming out of the defroster vests all the time then you could have a vacuum hose problem. If the air flow is correct but not sufficient then I would suspect a blower motor problem.