Question about 2002 Chevrolet Tahoe

2 Answers

I keep having to refill my coolant tank what do i need to do

I know this its a slow leak and I know that I dont have a crack in the tank. I've ran the tahoe for 1 hour parked and no leak and drove through the neighborhood and highway 1 hours. turned it off in my drive way, checked it every 10 minutes see if anything leaked from it for 2 hours and nothing appeared to leak from it. ALSO I know it is a leak because i filled the tank to the marker and 3 days later the low coolant light came on. i checked to see if I cross threaded the cap and it wasn't. there was roughly about a quarter left of coolant in the tank. The brand of coolant i use in the Tahoe is: Peak 50/50 Antifreeze and Coolant. (Blue Bottle) if it helps any to know the brand i use. MY O2 TAHOE WAS IN FOR REPAIR OF A SEAL FOR THE MANIFOLD GASKET...NOW 2 WEEKS LATER I AM SMELLING COOLANT IN MY CAB...WHEN I DROVE IT INTO A DEALERSHIP THEY SAID THEY SAW RESIDUE NEAR THE WATER PUMP...I CANT HELP BUT THINK THIS IS RELATED TO THE REPAIR THAT WAS JUST DONE, WHAT CAN IT BE?

Posted by on

  • 3 more comments 
  • merciergal72 May 28, 2009

    02 tahoe i need help my intake manifold gasket seal was replaced and now several weeks later i smell coolant in the cab i cant help but thinking its related and there is residue near the water pump but i had that changed recently what dould be wrong

  • merciergal72 May 28, 2009


  • merciergal72 May 28, 2009


  • merciergal72 May 28, 2009

    yest there is residue on the passenger side carpet

  • merciergal72 May 28, 2009

    ok...being that a wrench was found in my hood two weeks later and 4 different people worked on my car leads me to believe that this is related to workmanship..what specific hoses would be removed to fix the manifold which may have damaged the core neck



2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Chevrolet Master
  • 6,982 Answers

There is a small hole under the extension behind where the pulley is mounted, most times barely visible. If you see any coolant there the pump seal is leaking. Many times it will show up better with the cap off, as internal pressure can sometimes push the seal against the shaft and temporarily stop the leak. If any coolant is found there,(sometimes it will run down the lower hose and appear like a bad hose or clamp) the pump needs to be changed. No, it is in no way related to a manifold gasket leak.

Posted on May 28, 2009

  • 2 more comments 
  • Richard Scordino May 28, 2009

    OK if you changed the pump already and smell coolant in the cab but can't see any on the ground or elsewhere, it is possible that the heater core sustained damage during repair...they use plastic necks on some of those and they are not as durable as the old style metal ones...Is there any dampness or coolant residue on the passenger side rug?

  • Richard Scordino May 28, 2009

    Then, you have a heater core leak. Problem is if those hoses were moved or replaced during manifold R&R, the neck on the core may have broken...Only way to know that is to have it removed. It is possible that it may have just failed from time and miles of use...If leaking from the core itself that is likely the case. At present, your objective is to correct the problem, then if needed, argue the cause later!
    Good luck!!!

  • Richard Scordino May 28, 2009

    There are two hoses that attach between the engine and the firewall that carry antifreeze to the heater core and back to the engine. They are close to the back corner of the engine on the right side and usually one connects to the manifold. It is possible to lean on one while working or if it's removed it can be pushed out of the way.
    Leaving a wrench somewhere is not a sign of poor workmanship just leaving it behind. (in over thirty years I could fill a small toolbox with wrenches I've accidentally left behind Including a whole set of 1/4 inch sockets inside a chevy race engine that stayed there for a long time!)
    As I suggested, check the core after it has been removed and let it show you what happened...blaming anyone will not get you anywhere you want to go. Heater cores do fail by themselves...No one likes to see that but it can and does happen!
    You can make a better argument with facts than you can with maybes!!! And, you won't have to apologize if you are wrong!!!

  • Richard Scordino May 29, 2009

    Just posted reply to your other it and believe it...did repairs and managed shops for over thirty years...This kind of thing can happen...could be accidental or it may have happened just because of age and wear (cores are aluminum and not as durable as the old brass ones)...have it fixed and ask to retain old parts, bring it to another shop and ask them what they think about what they see.
    There are many good shops...if you don't trust the one you use, go to a different one.


  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 7 Answers

Freeze plug leak!

Posted on Apr 23, 2010


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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Coolant and oil leak

have a compression test done as the bubbles suggest a blown head gasket or cracks. That will account for the overheating. The oil leak may be from the head gasket or cracks.

Jan 21, 2014 | 2000 Ford Taurus

1 Answer

Leaking coolant

sounds like its coming from your overflow tank there is no hoses by the passanger tire.. dont sound like its anything to serious

Feb 17, 2013 | 1997 Chevrolet Malibu

1 Answer

I have a mini 2003 that is running hot. I checked the coolant and it was empty so refilled and drove 5km and ran hot again. All the coolant was gone. Is this a crack in the hose or the radiator?

Top up coolant, drive 1k and stop. With engine idling check for telltale drops of water under engine and you can locate area of leak.

Dec 04, 2012 | Cars & Trucks

3 Answers

I have a 1994 toyota camry v6, today my car boiled all the coolant out of the reservoir tank. I had a problem with disapearing coolant a few months back. I flushed the system tightened all the hoses and...

If you have eliminated as a cause:-

- silted up radiator
- fans not running (if they are running the temp sender is OK)
- leaky head gasket putting gasses into the water jacket
- radiator hose going soft and closing up

then that leaves the thermostat being stuck closed. Also if the coolant is disappearing this may still be a hidden leak. The V6 has a joint under the inlet manifold which is prone to leaking coolant, and on a hot motor the water disappears quickly.

Sep 18, 2012 | 1994 Toyota Camry

2 Answers

Boiling radiator coolant

This can be caused by the breakdown of the newer long life coolants, the early formulations broke down and do this exactly as you described, have the tank cleaned and flush the system and refill with the newer coolant that doesn't break down and turn to goo.

Sep 17, 2012 | 2001 Volvo V70

1 Answer

Cause of engine overheating.

Wait a minute. In your other duplicate question you did not say the tank was cracked, right ?
If the tank will not hold coolant, it will leak out and not be able to refill the radiator when it cools down.

Jul 27, 2012 | Cars & Trucks

1 Answer

My 98 deville had a cracked radiator. replaced it. all was fine till a couple weeks ago when it overheated due to coolant leak from purge tank. replaced it. no more leaks but still ran up to 140 w/ air on...

First, you must have a properly installed thermostat that is working correctly. Second, Northstar engines are notorious for air in the cooling system after draining and refilling - keep checking the purge tank level after overheating and after the cooling system cools down. Third, make sure your cooling fans are working correctly (relay, fuse, temperature sensor) - check to make sure both are running when it overheats. If all the above is correct, the problem will probably be blockage in the system (try a flush) or your water pump itself is failing.

Aug 18, 2017 | 1998 Cadillac DeVille

1 Answer

1993 Cavalier has coolant loss. It's losing the

you should have the cooling system pressure tested and inspected for a leak that may only show up under could be a slow leak from the water pump,frost plug,head gasket which wouldn`t show up in the oil,heater sounds like a small leak but this is the best way to start to find it.

Apr 02, 2012 | 1993 Chevrolet Cavalier

1 Answer

I have to keep refilling radaitor tank every two days

sounds like you have a coolant leak or your heads havent been done right or there maybe a crack in the head which has not been found.

Jul 06, 2010 | 2001 Chevrolet Malibu

3 Answers

I keep having to refill my coolant tank what do i need to do

CHECK YOUR oil and see if it is milky there have been some issues with heads cracking on these. another option is to have dye added to cooling system and drive a few days then have checked with a blacklight the dye will glow this can help spot a small leak

Jan 26, 2009 | 2002 Chevrolet Tahoe

Not finding what you are looking for?
2002 Chevrolet Tahoe Logo

657 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

80668 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides