Buick Repair Questions? Ask a Mechanic for Answers ASAP
I am sorry that you have not been helped yet. I just came online and saw your question
The stalling is most likely from either a dirty throttle body causing the throat plate to stick, small vacuum leak in one of the vacuum hoses or air intake leak.
On the blower issue, I need to know if the blower motor is working but no air out the vents, or the blower motor is not working when fan switch turned on
While possible, it is at the bottom of the list as you should have hesitation on acceleration, surging at steady speed and erratic idle with a clogged fuel filter.
On the blower motor and ac compressor not working, I need to know if yours had manual controls or pushbutton/digital controls.
Although nothing is working, when you turn the climate control on, does the temperature readout flash on and off for 2 minutes?
Ok, lets check for fault codes.
TO ENTER THE "AC DIAGNOSTIC SYSTEM CHECK"To enter the "AC Diagnostic System Check," press the "TEMP" up switch and the "OFF" switch on the control panel at the same time. Upon entry, a segment check will be performed and then the graphic display will show pointer number "-00". If the compressor clutch is being requested, the "EXT TEMP" graphics will be displayed. The fan up and fan down switch can be used to increase and decrease the pointer number. The "MIDDLE" switch can be used to change from pointer number -02 to DTC or parameter values for pointers "05-31."
TO DISPLAY HVAC DTCSTo display HVAC DTCs. select pointer number "-02". and press the "MIDDLE" switch. At this time any current and history trouble codes will be displayed. A failure indicates that the control has detected an open, short to ground or faulty component in that circuit. While that failure is detected, the control will use a default value. When the graphic display is displaying numbers 200 to 299, they appear as numbers 100 through 199 with a "-" in front of them. For example. the value of 200 would be displayed as "-100."
Just means that there are not codes which will make this more difficult.
Does the blower motor work if you select heat
Well drat, I will have to opt out and see if another expert can help as I dont have the correct wiring diagram to walk you thru testing