canmoe wrote:
> I have a 96 GMC seira with a 350 vortec,the A/C cools fine at morning
> startup or on the hwy,but when I go slow or am in town stop and go the A/C
> stops blowing cooled air,I have charged it and its not low,I know the air
> is flowing under the hood,I have cleaned it,can someone PLEASE help.
> it is hot outside,Thank You!

The airflow issues others mentioned are very likely. Make sure the fan
clutch gets stiffer as radiator temps increase. On a really hot day
sitting still it should practically lock up, causing that roaring sound
you are probably accustomed to. Other than that...

The blower speed switches are good for intermittant failure on your GM.
When your problem occurs, look at the A/C button and make sure the
light on it is lit. If the A/C button is depressed and the blower knob
is set to anything but "Off", then you probably have a bad blower
switch if the A/C indicator light is off.

It's actually more common for the blower switch to cause A/C compressor
engagement when in the "Off" position, but any problem is possible with
this GM switch.

Toyota MDT in MO