Question about 1999 GMC Suburban

2 Answers

I have a 99 GMC Suburban with a broken hose. It

I have a 99 GMC Suburban with a broken hose. It has radiator fluid coming out, but it has a metal end over the plastic tube, which makes me think it's for the AC. This hose is located on top near the themostat. What is this hose????

Posted by on

  • wildkat20 Sep 10, 2009

    Clearly you think I can't tell the difference between an Ac line and a radiator hose line! This hose has the same metal end to it as an AC line, which is NOT typical of a radiator hose. It broke at the point where the metal end is located. This metal end was connected to a solid metal part near the thermostat. It is rather dark outside so identification is an issue without a flashlight. My point is I will have to replace this hose and I'd like to be able to tell the parts person what hose I need. If YOU don't have any idea that's fine, but it's unnecessary to insult my intelligence!! That being said, perhaps someone else has a better idea, Thanks.



2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

Well it could be for ur ac because there a high and low side to add refrigerant it's normally close to ur fan like in the middle of it it sounds like u are talking about that hose it has a medel case on the tip of the hose the most like is the high side u might be talking about its normaly close to the reservoir tank where the coolant goes into

Posted on Jun 25, 2013

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,280 Answers

Ok... have this one diagnosed by a PROFESSIONAL sir!... You obviously don't know what you're looking at.

Posted on Sep 10, 2009

    PAUL MC G Sep 13, 2009

    Amazing!.. .Unless I look at it myself, there's no telling which hose you're talking about... That's why I wrote what I wrote. When I look at it, I know what I'm looking at.. or at least figure out what it is. When you write I'm insulting your intelligence, perhaps you should hire a professional and he/she will tell you 'what you're looking at.' Professionals know what they're looking at.



1 Suggested Answer

  • 2 Answers

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

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.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Just purchased a 99 GMC Suburban. Besides a LOF should I change Trans. fluid, Raidator fluid or any other fluids right-away?

hello thee and welcome to fixya
Sounds like you have yourself a very nice automobile there>
By all means yes you deffinatly want to change the trans fluid and the filter expecially i have seen more transmissions fail because owners do not change out this 30 dollar part .
Also yes the radiator flush and backflush then drain and refill with a 50/50 mixture of a good brand of antifreeze
Also have the rear Axel fluid checked and changed if needed
Other than that things like the power steering fluid and the windshield wiper fluid of course check them if the power steering fluid os of a dark brown color and has a smoky smell to it then i would change it ok
Hope this is very helpful for you
Please rate the solution it helps us give our customers a better service too
Best regards Mike

Aug 23, 2011 | 1999 GMC Suburban

1 Answer

I have a 90 GMC Suburban with 350 engine. Started losing radiator fluid. But a gallon of radiator fluid in it, started it, ran it for a while. Let it cool off. Checked radiator fluid. Has brownish,...

you can undo the two hose going to heater core and join together.milky brown oil is sign of head gasket,check oil level and condition.over ful and milky means head gasket.

Feb 14, 2011 | GMC Suburban Cars & Trucks

1 Answer

99 suburban leaking from oil cooler fitting on radiator

It sounds like you might have a crack in the plastic tank of the radiator. If the line was leaking, I would think you'd see some oil leaking. Any anti-freeze leaking? When the truck is cooled down, I'd check the anti-freeze and oil level.

May 29, 2010 | 1999 GMC Suburban

1 Answer

I have a 99 GMC Suburban 5.7L V8 engine that is not shifting gears after 20mph. Help!

I would check the fluid level and make sure the fluid is red. It may need a filter change, most anything else is going to involve things inside the transmission.

Mar 06, 2010 | 1999 GMC Suburban

1 Answer

1993 gmc sierra c1500 radiator hose broken

Loosen the plastic petcock valve at the bottom of the radiator to drain the coolant from the radiator, loose and remove both hose clamps slide them down away from the clamping area then take a pair of large channel lock pliers and sqeeze gently and turn the rubber hose to crack the bond that exists between the rubber hose and the metal tube, be sure not to squeeze too tight when getting the hose to turn, proceed to pull the hose off. Install the new hose with clamps slide the clamps over the hose ends and tighten them being sure to locate them 1/4" from the end of the hose, refill radiator and check for leaks.

Dec 06, 2009 | 1993 GMC Sierra

3 Answers

Oil is in my engine coolant reservoir as well as my radiator

Most likely the intake manifold has a broken gasket or iteslf is broken.

take it to a shop and have them diagnose it by checking for HC's in your coolant. If there are non present, then it could be inside of the timing cover or the intake. If there are HC's present, you will need a new Head, Engine or just Head Gaskets, but if it's over 150,000 miles, you may want to just buy an engine if that's the case. You can't repair a high mileage engine with new top end components because it will "**** out" or ruin the bottom end shortly after installation.

Good luck! Hope that helps.

P.S. - I have mroe GM's come in with that same symptom than any other vehicle. After your repairs are complete, get rid of the DEXCOOL and go with a good, green antifreeze. It works much better than DEXCOOL.

Kevin, ASE Certified

Sep 12, 2009 | 1999 GMC Suburban

1 Answer

99 Chev suburban 5.7 liter, antifreeze keeps leaking have to fill reserve and radiator evryother day, (new radiator) no white smoke, oil looks ok, cant see leak anywhere on the ground or frame??? Wheres it...

check the condition of the reserve tank and the hose from the reserve tank to the radiator for leaks if no leaks there have the Radiator cap presure tested . also this could be a air lock in the engine if the radiator is new with the engine running and the heater on hot observe the fluid level in the radiator with the cap off if it drops as it warms add more coolant this will purge the air .

Aug 26, 2009 | 1999 Chevrolet Suburban

1 Answer

I have a 99 suburban 5.7, and im gushing fluid inbeetwn the thermastat and the air condition pump

You either have a leak in the hose or a hole in the themostat housing. Check the hose for holes first then tighten the hose clamp. If it still leakes then remove the hose from the thermostat housing and replace both the thermostat and the thermostat housing. Any more questions please ask.

Dec 30, 2008 | 1999 GMC Suburban

2 Answers

ATF is leaking out of the flywheel assy of my 99 Suburban 1500

if it is ATF then it is the trans pump or input shaft seal, these both require the removal of the transmission.

If it is coolant it may be a rear freeze plug, but this is rare and also requires the removal of the transmission

A more likley cause is a leaky intake manifold which is very common on the vortec v8 engines, it leaks at the very back and runs down the bell housing. this repair is a bit extensive but can be accomplished by a good DIYer given time, space and tools this repair is also the least expensive of the three, about $300

Nov 25, 2008 | 1999 GMC Suburban

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

Related Topics:

184 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

76132 Answers


Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

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

Answer questions

Manuals & User Guides