Question about 1991 GMC Sierra

Open Question

Where is low pressure port on a/c system on 1998 gmc sierra truck

Posted by on

6 Suggested Answers

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.
goodluck!

Posted on Jan 02, 2017

rockitman187
  • 2559 Answers

SOURCE: gmc sierra 2008 low tire pressure problem

You can follow this to reset it.
Ignition ON, initiate the TPM Learn Mode
using one of the following procedures:

  1. On vehicles equipped with keyless entry, simultaneously press the keyless entry transmitters lock and unlock buttons until a double horn chirp sounds indicating the Learn Mode has been enabled. The left front turn signal will also be illuminated.
  2. On vehicles not equipped with keyless entry, press and release the driver information center (DIC) INFO button until the TIRE LEARN message appears on the DIC display. Press and hold the SET/RESET button until a double horn chirp sounds indicating the Learn Mode has been enabled. The left front turn signal will also be illuminated.
  3. Increase/decrease the tire pressure for 8-10 seconds then wait for a horn chirp. The horn chirp may occur before or up to 30 seconds after the 8-10 second pressure increase/decrease time period has been reached. Once the horn chirp has sounded, the sensor information is learned and the turn signal in the next location to be learned will illuminate.
    After the horn chirp has sounded and the right front turn signal is illuminated, repeat step 2 for the remaining 3 sensors in the following order:
    3.1. Right front

    3.2. Right rear

    3.3. Left rear

    When the left rear sensor has been learned and a double horn chirp has sounded, the learn process is complete and the RCDLR exits the learn mode.
    Ignition OFF, adjust all tires to the recommended pressures

Posted on Jan 22, 2009

  • 13 Answers

SOURCE: 1998 GMC Sierra radio and display stays on all the time

First of all...does your truck have the retained accessory power (RAP)? If it does, the radio would always stay on with the key off until you open the drivers door. If it does have RAP and the door pin on the drivers door has went bad, then the truck doesn't know that you opened the door and continues to allow accessory power (although it would still cut off after about 20 minutes). If the interior lights come on when you open the door, then the pin is ok. If the lights come on, it could be the RAP relay. If it has gone bad, it is possible it is stuck supplying power and needs replacing. The relay should be labeled in the fuse panel, and there should be other relays in the panel with the same part number. You can swap a relay for the RAP relay and see if it fixes the problem...if it does fix it swap the relays back and replace the RAP relay. If the truck doesn't have RAP then it is possible the problem is in the radio..if you have a friend with a GM car or truck close to the same year you could swap radios and see if that fixes your problem...should be pretty simple. pull the cover off the dash, it just clips on, take out a couple screws that hold in the radio, unplug it and plug in the other radio. sorry so long winded...hope this helps you somewhat.

Posted on Mar 13, 2009

daves944
  • 1050 Answers

SOURCE: rough idle,runs fine on highway

It is possible that the regulator is leaking into the intake plenum, or one of the injector lines has a bad O-ring and is doing the same thing. This was actually a big problem with this system on the 4.3L engines, but it is a little different on the 5.7. Before tearing into this this though, I think it would be a good idea to get a professional diagnosis. I would start with a compression test. The miss could be caused by low compression in one or more cylinders. The injector assembly has the regulator mounted right on the side of it and the whole assembly resides inside the intake plenum. It is not that difficult a job, requires some patience and skill, the worst part is the cost of the parts.
I've attached a picture of the injector assembly with the reg attached and highlighted

9533d3a.jpg

Posted on Mar 19, 2009

  • 66 Answers

SOURCE: 1998 GMC Sierra pickup truck cabin fan problem

Your blower moter is under your glovebox and very easy to replace.I dont think thats your ploblem.I would pull off the dash.It will snap right off without breaking anything.Then pull out the part that holds the selector switch for the fan speed.Then you unplug that switch.Clean the copper contacts.Plug it back in.If everything works again like it should and did in my truck then it is either that switch that is bad or the wiring harness.I would replace that switch.

Posted on Apr 01, 2009

  • 116 Answers

SOURCE: 2003 GMC Sierra Knock sensor and oil pressure??

the knock sensors are located below the intake plenum,or,upper intake manifold as some call it, they screw into the lower intake, the front one is sensor 1, the rear is sensor 2. it is wise to change both if you have some miles.since you are going to be buying a gasket set to do this job.the sensors are cheaper than the gaskets.

Posted on Jun 12, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Which port on my 1996 GMC 350 Vortec a/c unit is the low pressure ?


There should be two, one is bigger than the other.
Only the low side port will fit a recharge hose kit.

Jul 19, 2012 | 1996 GMC Sierra

1 Answer

Need to put freon in ac not sure which valve is the low side one. The one standing up right or the one laying sideways. it is a 1998 gmc 3/4ton sierra pickup 350 auto trans


It is the LARGER hose, and the actual fitting is smaller-your fill hose that comes with your refill kit will only fit the suction (low side) port, so you can't do it incorrectly.

Jun 29, 2011 | 1998 GMC Sierra

1 Answer

Is there a diagram of the low ac fill port on a 1998 vortec 5700 engine


The low side port is on the accumulator. Silver can near the firewall on the passenger side.

Jun 24, 2010 | 1998 GMC Sierra

1 Answer

Where is low preasure valve for air conditioner


Low pressure service port is located on the Accumulator ( Silver Cylinder ) where the low side A/C line domes from the compressor. Location is on the passenger side fender by your evaporator housing and blower motor housing.
Thank you for using fixya and don't over charge your system.

Jun 03, 2010 | 1998 GMC Sierra

1 Answer

I need to add freon ton a 1998 suburban. I


If the compressor will run turn it on and let it run for a few minutes, the line that gets cold is the low pressure side, this is usually the one closest to the firewall. The reason that they are 6 inches apart is that they are on opposite sides of the orfice tube, hence one is high pressure and one is low.

Apr 16, 2010 | 1997 GMC Suburban

1 Answer

Need to recharge the ac system. I see there are two ports within the system. Which is the proper one to recharge my system? 1994 gmc sirra pickup k1500 with 350 motor


if you truck has r-12 you need to convert to r-134
if you truck has been converted to r-134 the small port on the low pressure side is the port to use..
the truck must be in a warm aera about 80 degrees
then hook up the hose or gauges on to low side
start the truck and turn the air on (putting it on high cool and high blower open the can of freon and as the compressure in the truck starts to draw the gas in rock the can from side to side .. if the gas is going in the can will get cold

Mar 01, 2010 | 1994 GMC Sierra

1 Answer

1998 GMC Sierra- runs rough then stalls when


had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!

Jun 04, 2009 | 1998 GMC Sierra

1 Answer

1999 GMC Sierra 1500 A/C blows warm air when idling


the low pressure port is the charging port, this port is either in the low pressure line or the accumulator that the low pressure lines to to (can shaped object), the low pressure line is the larger of the two lines from the compressor.

May 27, 2009 | 1995 Chevrolet K1500

1 Answer

Question on fuel pressure


fuel pressure on a v6 or v8 is 60 to 66 psi

Feb 06, 2009 | 1998 GMC Sierra

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

229 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

75797 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

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

Answer questions

Manuals & User Guides

Loading...