• Fuel and Engines
  • Chevy Tahoe
  • Water Pumps
  • DIY Projects

How do you replace the water pump on a 1999 Chevy Tahoe?

Top Answer
User Avatar
Wiki User
Answered 2015-07-16 18:07:28
Response to below:As stated in my below (referencing the 1996 Tahoe) I used a very large adjustable wrench (I think it is a 14in), I believe I also had to use something to hold the fan from moving while I did this.

- I don't recall if the threads are normal or backwards (sorry)

- The tool AutoZone had to rent was for FORDs and did not work when I tried to use it.

not been able to remove fan from water pump. dont know if it takes special tool to do this or what?

Some parts stores have a tool you can rent or borrow. It is not a special tool it is just a really long angled wrench that lets you get to what you need. It will actually be a set of two wrenches. Autozone had them when I changed mine a few years ago.

-This is from a 1996, so some things may be slightly different

It has been a couple years since I did it, but as I recall... I removed the fan cowl for working room-while waiting on remaining antifreeze to drain then got a big a** adjustable wrench (I had to buy one because it was the only thing I could find that would work) and removed the fan from the pulley I think I had to put something though the hole in the pulley to keep it from moving. Remove belt ( I assume you know how to do this) locate bolts at each end of the water pump, remove, and scrape off old seal. I believe I had to use some RTV to create new seal, then bolt back together, and check directions on RTV for drying time before refilling with antifreeze/water. You may also want to remove the pulley from the old pump before removing it from the block as you will need it with the new one as well. and I found it easier to do this way.


I replaced the water pump on my 1999 Tahoe when I replaced the timing chain & gears. Remove the upper fan shroud to get good access to the fan mounting nuts. I would recommend using a chain wrench to get enough torque on the pulley to remove the nuts that hold the fan on. Be sure to put a rag over the pulley to keep from galling the pulley surface (or just buy a new pulley). This will prevent any galling of the pulley surface from damaging the serpentine belt after putting back together. The pump I bought just had the mounts on it for the pulley (didn't come with new pulley) & I was able to reuse mine, since I did not damage it with the chain wrench (used a couple of rags to protect the pulley as mentioned before). You can easily drain the coolant from the block by removing the knock sensor on the side of the block next to the oil pan. This makes it easier to get the coolant out so you don't make a mess when you take the pump off. If you use a clean enough garage and bucket, you could even strain filer and reuse the coolant. The stuff is around $10 a gallon!

I am not a big fan of RTV sealer, but it is an option (small beads of dried sealer can break off and clog coolant channels in etc. Especially small coolant channels in the head, block and transmission cooler lines. Had a buddy have an oil pump go out and blow an engine thanks to RTV sealers. I also have heard transmission guys talk of all sorts of Horror stories of transmissions going out for the same reason.... RTV sealer). That's why they make gaskets.

If you want to have the gasket to adhere to the parts for easier installation, you could use high tack adhesive or grease. I would recommend a food grade equipment grease for an antifreeze coolant system to prevent petroleum based molecules causing cavitation on your water pump. Plus, if you don't use these sealers you don't have to wait a day for the sealer to cure to drive your car. If you work on your car in colder temperatures, you would have to keep the sealer warm enough to cure properly, which is hard in the winter months (could use a halogen light or a heat gun for a couple hours I suppose). Unfortunately, GM has gotten cheap and gone away from gaskets and likes to use RTV sealers in some applications (for example Saturns use RTV sealers for the timing chain and oil pan gaskets. might be why Saturn use so much oil!!!!!). Fortunately, you can still buy the water pump gaskets for the 1999 Tahoe!!!!

If you do go with the sealer, Just make sure that you get the proper sealer to use on water pumps and that the surfaces are really clean before applying. The chemicals in the anti freeze can cause some sealers to not seal properly. Brake cleaner is usually the best surface cleaner since it doesn't leave a residue like degreasers. Apply the sealer SPARINGLY!, since you don't want it to overlap past the gasket and break off into your coolant system when the gasket is pressed together (I already mentioned what can happen when a chunk of sealer breaks off into you system). Plus, be sure to read the curing temperature and time if you go with an RTV sealer.

User Avatar

Your Answer


Still have questions?

Related Questions

How do you replace the tail light bulb on a 1999 Tahoe?

take it to chevy

Is a 1999 Chevy Tahoe transmission compatible with a 2001 Chevy Tahoe transmission?

Is a 1999 chevy tahoe transmission compatible with a 2001 chevy tahoe transmission?

How much does it cost to replace head gasket in 1999 Chevy Tahoe?

Price for parts on 99 tahoe head gasket

Neutral safety switch on a 1999 Chevy Tahoe how to change it?

The neutral safety switch, on your 1999 Chevy Tahoe, simply plugs in. Unplug the neutral safety switch and replace it with a new one.

How do you fix a master cylinder leak on a 1999 Chevy Tahoe?

Replace the master cylinder.

How do you replace the fuse for the data link connector 1999 Chevy Tahoe?

someone done something to my 2001 Chevy Tahoe front bumper. its damaged but its not dents. is there a way to repair it.

Where is the ac expansion valve 1999 Chevy Tahoe?

Chevy tahoe has a oriface tube

Where is power seat fuse on a 1999 Chevy Tahoe?

The power seat fuse on a 1999 Chevy Tahoe is located in the main fuse panel near the hood release. A fuse removal tool is needed to removed and replace the fuse.

Is there going to be a recall on 1999 Chevy Tahoe steering shafts?

There are currently no recalls for the 99 Chevy Tahoe.

How do you change fuel filter in 1999 Chevy Tahoe?

How to change fuel filter in 1999 Chevrolet Tahoe

Where is the AC filter on a 1999 Chevy Tahoe?

The 1999 Chevrolet Tahoe didn't come with a cabin (HVAC) filter.

What should the idle be set for a 1999 Chevy Tahoe?

idle speed for a 99 Tahoe

Lug pattern on 1999 Chevy Tahoe z71?

its a standard 6 lug i have them on my Tahoe

Labor charge to replace a intake manifold gasket on a 99 Chevy Tahoe?

The labor charge to replace and intake manifold gasket, on a 1999 Chevrolet Tahoe, is approximately $180. It takes approximately 2 1/2 hours to replace the gasket.

What transmission is in a 1999 Chevy Tahoe?

4L80e transmission

Is there a fuse for the power locks on a 1999 Chevy Tahoe?


What transmission is in your 1999 Chevy Tahoe?

4L60E transmission.

1999 Chevy Tahoe pulls to left?

get an alignment

How do you replace the cabin filter on a 1999 Chevy Tahoe?

Look behind your glove box. simply take out the old, and put in the new

Where to find vacuum selector switch on 1999 Chevy Tahoe?

The vacuum selector switch on a 1999 Chevy Tahoe is located under the dash. It is to the right of the gas pedal.

Will 2002 Chevy Blazer tire rim fit a 1999 Chevy Tahoe?


How much is a rear end for a 1999 Chevy Tahoe with 4 wheel drive?

My son's 1999 Chevy Tahoe is having a replacement rear-end put in this week. $1100.

Where is the AC drain on 1999 Tahoe?

You can find the air conditioning drain on your 1999 Chevy Tahoe on the bottom of the air conditioner compressor. The condensation drain hose routes water to the bottom of the engine compartment.

Diagram to replace brake light on 99 Tahoe?

A diagram to replace the brake light on a 1999 Tahoe can be purchased from your local auto parts store. It is located in the Haynes 1999 Tahoe Repair Manual.

Will a 98 Tahoe door fit a 01 Tahoe?

NO. In late 1999 Chevy REDESIGNED ALL trucks and SUV's. Nothing over 1999 will interchange with your 98 Tahoe.