Question about 2000 Chevrolet Blazer

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Where is the low pressure port for the ac unit on my '97 chevy blazer.. so that i can add r134a coolant

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On the accumulator

Posted on Aug 13, 2008

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What kind of ac coolant does it have 134a or r 12 and where is the low pressure port for the ac located


Depends on the year. Cars in the early 90's used R12. Anything later uses R134a. The size of the charge ports will define the R134a port. An adapter is needed to fit on the charging hose. R12 requires no such adapter. Ther charging label under the hood will tell you what refrigerant is needed too. Since you failed to give enough information on what make and model car you have, a general answer for the location of the low pressure port will be given. On the compressor, the larger diameter hose connection is the low side. Connect there, or look for the drier/accumulator (Large diameter silver container near the firewall). Connect there. You will need to access the AC information label under the hood to determine how much freon to add to the system.

Mar 12, 2016 | AC Cars & Trucks

1 Answer

How much freon does my 2001 chevy blazer hold


Normally there is a sticker on the a/c housing or the accumulator. I would start with 2 cans which is 24oz and then add as needed.
You use the high and low gauges to judge when the system is full.
It also makes a difference if you vac the system first.
You'll have to over-ride the low pressure switch to keep the compressor running while you add the first can.

Jun 23, 2012 | Chevrolet Cars & Trucks

1 Answer

I need a diagram of the A/C low pressure port on my 1996 chevy blazer. I know it is aways on the larger diameter tubing but it seems the port seems tube seems to be coming right off the side of large...


Find a shiny aluminum canister under the hood thats bigger than a soda can and follow the tubing that comes out of it back towards the front, you will come to a valve similiar to an air valve stem on a tire. The valve has a black plastic screw off cap. That is the low pressure port. The high pressure port is located behind or near the a/c compressor

Sep 24, 2010 | 1996 Chevrolet Blazer

2 Answers

Where do i find the low side on ac unit


Check under the air filter box, just below it, will be the low side port.

Sep 02, 2010 | 1999 Chevrolet Lumina

1 Answer

02 chevy blazer 4.3l blowing hot air out of a/c want to charge with r134a but nothing is marked on engine for low port/ high port have 2 options one is on cyclinder part and other is on the line.


The one with the blue color cap is the low pressure side. The smaller of the lines is the high pressure side and should have a red cap on the fitting. Hope this helps and best wishes/

Aug 08, 2009 | 2002 Chevrolet Blazer

2 Answers

Which port is used to add refrigerant to AC on1999 Blazer


The low pressure port is on the drier (the silver cylinder by the blower motor on the passenger side of the vehicle). screw off the black cap and hook your adapter on to it.

Aug 08, 2009 | 1999 Chevrolet Blazer

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