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Mechanic? GMC
Posted: Mon Jul 30, 2007 11:59 am
by missed mallards
My brother has a 2000 GMC and the A/C doesn't work.
What all could be involved that i could check to see if it's working or not?
It just quit blowing cold air and has little air pressure.
thanks
Posted: Mon Jul 30, 2007 12:07 pm
by sunnylab
look under the glove compartment and make sure
there is no blockage on the air intake. Usually a plastic
walmart bag is involved in these cases.
Posted: Mon Jul 30, 2007 12:11 pm
by Boogerden Boy
sunnylab wrote:look under the glove compartment and make sure
there is no blockage on the air intake. Usually a plastic
walmart bag is involved in these cases.
Tom,
There is prolly a little filter under the glove box.
My Dad has an '04 GMC, and he has to blow that filter out 2-3 times during the summer because the air flow decreases so much
Posted: Mon Jul 30, 2007 12:28 pm
by torch
check your highside switch. located next to filter drier. lots of times you can shake the wires and it will start working. If it does replace swich about 15.00.
Also that truck has cab airfilters that may be stopped up and killing your airflow.
Posted: Mon Jul 30, 2007 1:11 pm
by cwink
torch wrote:check your highside switch. located next to filter drier. lots of times you can shake the wires and it will start working. If it does replace swich about 15.00.
Also that truck has cab airfilters that may be stopped up and killing your airflow.
You can also jump that highside switch with a paper clip to see if it starts blowing cold..
Posted: Tue Jul 31, 2007 11:11 am
by RNAIL
Go ahead and replace the cabin air filters if they have never been replaced. I helps the A/C "breathe". Do them at least annually.
Posted: Tue Jul 31, 2007 11:22 am
by bm-tn
Different subject, same issue. Air conditioner leaking in the floor on the passenger side. What causes this?
Bryan
Posted: Tue Jul 31, 2007 11:27 am
by Ducks be us
Heater cores will leak in the passenger floor board
Posted: Tue Jul 31, 2007 11:32 am
by Super Black Eagle
bm-tn wrote:Different subject, same issue. Air conditioner leaking in the floor on the passenger side. What causes this?
Bryan
is is water or anti-freeze?
Water = condensation - welcome to Mississippi
Anti-freeze/coolant = leaky heater core - defroster will leave spots on windshield and emit that sweet smell of antifreeze.
Posted: Tue Jul 31, 2007 12:00 pm
by torch
If its water your vent tube is stopped up with dirt, if antifreeze you have a bad heater core
Posted: Tue Jul 31, 2007 12:19 pm
by Gumbo
how do you replace the cabin air filters?
where are they located?
Posted: Tue Jul 31, 2007 12:41 pm
by torch
they are on the passenger side under the dash.
Posted: Tue Jul 31, 2007 2:20 pm
by donia
Gumbo wrote:how do you replace the cabin air filters?
where are they located?
On my '01 Yukon: there is a plastic plate with 3 screws that I have to take off below the glove box, then 1 more screw in the filter cover - long skinny plastic piece with a tab on the motor side and screw closest to you). Pull the first filter out, then there is another one further in (towards the motor) that should almost fall out. Hardest part for me was getting the 3 small screws out with big hands. You can get the filters at NAPA for $15 and the box comes with both filters.