Howdy everyone! I've recently started repairing my own vehicles, and could use a little help troubleshooting an issue. I have a 2003 Yukon XL, and the air is either as cold as possible or as hot as possible. The front temperature controls do nothing in between. I've done some research, and other posts make it sound like the flapper valve actuator. AC Delco part number 15-72506.
Does anyone have any experience that would help with this?
Thanks in advance,
Alex
Does anyone have any experience that would help with this?
Thanks in advance,
Alex