I am having a problem with the HVAC system on my 98 DeVille. It's blowing hot air out of the A/C vents on the drivers side and cold air from the passenger side vents. It's 100 degrees F outside, so I would prefer cold from both sides. Under the hood the dryer and freon lines are nice and cold, so it's most likely an under the dash vacuum issue.

Does the Haynes Manual on my car address detailed diagnosis and repair of this problem?