Question about 1999 GMC Suburban

1 Answer

Rear a/c works fine but front a/c blows about the same as outside air temp

Where is the a/c orifice on a 94 suburban

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 220 Answers

The orifice on Suburbans with rear A/C is located near the Y shaped junction block in the tube between the condenser and the front evaparator. It is on the right side near the radiator support. The orifice is in the tube between the junction block and front evaporator. If you look close there is a slight crimp in the tube to keep it from sliding too far into the tube. You should be able to disassemble the tube and remove and replace it.
Sorry for the late post but I just saw your question.

Posted on May 28, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Our front ac is not working and back is cold in our 1999 GMC suburban, we tried putting freon and it didn't work


Dual zone front/rear ac systems have 2 evaporator cores. And 2 orifice tubes, which are just inline
filters. Either your front evaporator core or orifice tube is probably stopped up.

Sometimes you can get to the evaporator cores without removing them from the vehicle, and clean it.
Evaporator cores do get stopped up sometimes, because the blower motor pulls in air with dust and debris from outside, and the air is cooled when it passes through the evaporator core.

But evaporator cores are a nightmare to replace, you usually have to remove lots of stuff under the dash and lots of stuff under the hood to remove them.

Aug 12, 2011 | 1999 GMC Suburban

1 Answer

95 Chevy Surburban. Air conditioning issue, front air blows warm, rear unit blows cold. Have replaced orface 3 times, replaced compressor 3 times, replaced accumulator 2 times, flushed condensor,...


they run off of the same compressor if rear is cold and front is hot the hot and cold function in the heater box is not working possible cable problem ? or a vacum line under dash

Aug 04, 2010 | 1995 Chevrolet Suburban

1 Answer

2001 Chevy Suburban: Front A/C is very cold...Rear A/C blows warm


it has a thermal expansion valve on the rear evap core top

Sep 06, 2009 | 2003 Chevrolet Suburban 1500

1 Answer

Rear AC is ICE cold but front blows Warmer air


a plugged orifice will prevent the front from becoming cold

Sep 01, 2009 | 1999 Chevrolet Suburban

1 Answer

1992 GMC suburban front air don't blow


REMOVE THE BLOWER MOTOR CHECK IT.HOOK IT TO BATTERY TO SEE HOW WELL IT WORKS. IF IT RUN SLOW OR RUN STOP RUN.REPLACE IT.IF IT CHECKS OUT OKAY.THE PROBLEM. COULD BE THE AC+ HEAT- CONTROL MODE SWITCH.

Aug 02, 2009 | 1992 GMC Suburban

2 Answers

1999 Suburban, A/C on warm air from front vents, cold air in rear


The car uses the same freon in the front as it does in the rear. If the rear a/c is working, you either have a plugged evaporator in the front unit, or perhaps a bad heater switch. Try switching the heater to hot and see if it blows even warmer air from the front vents. If so, the heater switch is working and then it sounds like a plugged evaporator or maybe a plugged orifice tube. That is a good place to start looking. Hope this helps.

Jul 07, 2009 | 1997 Chevrolet Suburban

2 Answers

Rear ac on 94 surburban blows warm, front is cold. Is there only one orifice on the dual air system.


The rear air has an expansion valve in the rear of the cargo area right next to the rear evaporator. There is no orifice or filter between the condenser and the rear expansion valve so if there is any debris in the line it will clog the expansion valve. The orifice under the hood is only in the front circuit so if the front is cooling and the rear is not, most likely the expansion valve is clogged and needs to be replaced.

There is a factory service bulletin on how to r&r the expansion valve. It requires some cutting since they did not design it to be replaced. Part of the service bulletin is adding an inline filter at the outlet of the condenser before the front and rear flows divide. That will keep the rear from clogging up again.

I have a 94 Suburban and I had to do this in about 1998. With the filter I haven't had any problems since.

Jun 11, 2009 | 1999 GMC Suburban

1 Answer

Rear a/c not blowing cold, front works fine.


you may not have enough refrigerant. a low charge can cause the rear in this dual system to not work for beans. charge with a can of uv and find the leak. fix the leak. evac the system and recharge. i think you take 4 lbs, but check the accumulator sticker. you may want to just change the accum at the same time.

May 19, 2009 | 1999 Chevrolet Suburban

1 Answer

2003 suburban rear air works fine but won't blow heat.


This problem is caused by what is called the air temp control blend door, either the door is sticking in the duct or the electric actuator that moves it is defective, the actuator is the common part that fails, the bad news is the dash assembly must be removed to replace the parts.

Feb 11, 2009 | 1999 Chevrolet Suburban

1 Answer

2003 escalade rear heater does not blow hot air


Temp. actuator maybe. A electrica motor that moves a door from cold to hot in the rear HVAC unit . Removing the rear trim panel to get at the auxiliary HVAC unit would need to be done . Search on youtube , video showing how to do it .
Rear auxiliary heat and actuator overview repair for Yukon Tahoe Suburban...
2004 Tahoe rear hvac system only blows cold air diagnosis and temporary fix

Dec 15, 2017 | 2003 Cadillac Escalade Esv

Not finding what you are looking for?
1999 GMC Suburban Logo

Related Topics:

439 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

79186 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...