Left side dash cupholder under the left side ac vent no longer springs out

that would be the blender door accuator

Under drivers side is control arms for vents; you , try to free up manually this may help some. unfortunately, this may be a remove and clean (dish washer!) situation. Kids left crayons on mine....

Check under the dash to see if the duct work for the vents has come loose.

Hi. This is an easy do. With the cup holder fully extended, slide a flat puddy knibe into the top **** between the cupholder and the the dash. slide it side to side to disengage the stops that are part of the cupholder while pulling out lightly on the cupholder. It should come out without much effort. To reinstall, just push the replacement cupholder into the slot. Good luck!

The duo-valve needs to be replaced. It controls the coolant flow to the heater core. They get stuck open or the rubber diaphram comes apart and no longer seals. In either case it allows the coolant to enter the heater core and causes hot air to blow out of the side dash vents. See if the inserts are available separately.

94-99 luminas i think are all the same as far as the dash and the console etc.... At any rate i ran into this problem so i can tell you what to do.
#1 Remove the ash tray by pulling it out n pressing the silver tab down while pulling it completely out of the dash
#2 Remove the four 9/32 nuts around the perimeter of the black metal housing that held the ashtray in place
#3 there are 2 more hidden 9/32 nuts right under the trim piece under the stereo. If you aren't careful you will bust ur dash apart and have to replace this all. The easy way i did it was i pulled out the broken cupholder and sawed it in half then pushed it back in so i gained easier access to the bolt locations as they are quite hidden, next pull up the bottom right corner of the radio trim piece on the dash and keep it propped with a flathead screwdriver and remove the final 2 nuts. Twist loose the cigarette lighter hookup, bend back the 2 tabs holding the old cupholder in the track to remove it and ur ready to re-install ur new cupholder

It sounds like the control motor switching from hot to cold is stuck halfway in between the two temp settings. You will have to take it down and replace it, it is mounted under dash passenger side near the blower motor.

Sounds like either the computer that controls the auto climate control has gone out or you could have a vacuum leak. I would definitely check the vacuum leak first. I took my 98 Lesabre to a repair shop several years ago for the same problem. When I picked it up they told me my computer was out and it would cost around $600 to fix. As an alternative, they had unhooked and rerouoted vacuum lines, breaking a tube off the controls under the right side of the dash. They told me that they would have to remove my glove box each spring and fall and reconnect the vacuum lines to change the airflow from floor to dash and vise versa. My fix was to run the lines under the dash just beneath the ash tray and connect shut off valves to the vacuum lines. Now when I need to use the AC I can change the flow of the vacuum by simply turning these two valves so that the flow changes from floor to dash or back. I know this is pretty jack leg but the damage had been done and this has actually worked pretty good.

This is a motor that controls the air doors like temperature, defroster, floor air and vent air distribution. You have up to three different ones and one of them need to be replaced.

They are held into the dash with plastic "spring" out retainers on the dash register. Use a thin blade like a putty knife to disengage the locks.