Question about 1999 Chevrolet Blazer

1 Answer

For months there has been an intermittent ?swishing? noise while my car is in park or driving. Each time I took it to my mechanic, however the noise stopped each time. This last time I was told that the water pump was making a slight noise. This week the ?swishing? is more frequent and louder. I just called my mechanic and was told it could be the Heater Core. I have an appointment to drop it off on Saturday, but now I am skeptical that it will be diagnosed correctly. I am reading that it could be a vacuum leak or the battery is making the alternator work too hard. Please help as I am a woman with no clue . . . about cars.

Posted by on


1 Answer

  • 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
  • 447 Answers

I have heard several heater cores gurgle on these. Usually the noise is most noticable when accelerating and will sound like it's coming from the right side of the dash ahead of where the passenger sits. If this is it it can be very difficult to get it to completely stop making this noise [and we've tried many different tricks to do so] It doesn't hurt anything but is annoying. The test we use to see if this is what's making the noise you are hearing it to temporarily bypass the heater core by disconnecting the heater hoses and looping them together under the hood and driving the vehicle for a day or so. If the noise is gone you've got your culprit. If not then at least you've eliminated a suspect. Hope this helps a bit and good luck!

Posted on Jul 08, 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

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.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
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

Thumping noise driving

Not sure what the "mechanic" actually did but you may have lost a wheel balance weight.

Jul 19, 2017 | 1999 Volvo S80

1 Answer

I have rattle and grinding noises, can feel intermittant fibrations while foot on clutch and a whisteling sound when revving while parked or excellerating while driving. oil lightc comes on and off...

Don't think its the flywheel, but maybe a worn out thrust bearing. I suggest you replace your clutch plate and have the pressure plate checked at the same time you replace the thrust bearing.

Sep 18, 2013 | Cars & Trucks

1 Answer

A knocking and grinding noise coming from underneath the car,

if you had the CV JOINTSreplaced , they both should have lasted for a long time, how much do you trust your mechanic ? always something to consider ! also, the mechanic who replaced the CV'S last time, did he do a good job ? was there a grinding noise then ? did you get a warranty on the previous cv's, I'm not tryin to point any fingers, just sayin, you need to be aware of every move you make, and who you make it with. NOW, go to good transmission shop, have them test drive ,with you in car, and inspect your front end and transmission, its free , good luck

Feb 17, 2013 | 1999 Chevrolet Malibu

1 Answer

2005 Toyota Camry 4 cylinder intermittently won't start

try starting the car and while running disconnect the negative battery cable,if the car still runs turn on the head lights,if the car dies the alternator is weak. I think its weak and can charge the battery as long as the lights are off,but cant keep up when theyare on. so if drive most of the time in the day time you are ok as long as you dont have to start the car too many times. when you drive with the lights on and the engine slows to an idle like when you park the car dies. make sense?

Dec 18, 2012 | 2005 Toyota Camry LE

1 Answer

New brakes put on with new bearing etc when i

Is this a swish swish noise associated with speed of rotation of the wheel. Often if you are passing a wall whilst driving down the road and take the window down the noise will be reflected back to you. Feather the brakes very gently until the noise is pronounced. My guess is that the wheel bearing has bedded in and the stub axle nut could do with a bit of tightening up. Once you have located the wheel that is causing the noise lift that corner of the car so the wheel is just free to freely rotate. Spin the wheel and listen for the tell tale noise. Tighten the central nut until some resistance to rotation is felt ease the nut back until free motion is felt again ease the nut by a single flat from this point. Now rotate the wheel the again and listen. Basically this process reduces excessive play in the bearing. Excessive bearing play allows the wheel hub to wander a tiny fraction allowing the disc to make contact with the brake shoe, hence the noise. Once the play is reduced this intermittent contact should disappear

Apr 29, 2010 | Volkswagen GTI Cars & Trucks

1 Answer

Because of noise from the left rear wheel of my 1991 Merc SEL420, the mechanic took out the parking brake assembly which was broken and the cause of the noise. I do not use the car much but now would like...


Mar 25, 2010 | 1991 Mercedes-Benz 420

1 Answer

96 mustang dies electrically while driving

did you change your battery or have a load test performed on it,it could be bad.
Have your mechanic change the wire harness for the alternator at the plug,they can burn out on the inside and look good on the outside,They are black 10 guage with orange stripe,and smaller guage plug wires.This part canbe purchased from the parts store, or dealer.

Aug 08, 2009 | 1996 Ford Mustang

4 Answers

I have a high pitched noise which appears to be coming from front right engine compartment (as you are looking at the engine) which sounds kind of like a belt that is squealing. It is intermittent. Just...

Could be several things. WHICH ENGINE?.. 4 cylinder (has three belts, power steering/water pump, alternator & A/C compressor, one tensioner pully A/C compressor), The V6 2.7 (has only one belt, 1 Idler pully and 1 tensioner pully), the V6 3.5 has two belts - A/C/alternator, and power steering - there are two tensioner pullys). Noises can be caused by the belt(s) themselves, pullys, bearings, pully bearings, water pump shaft bearings (or belts/pullys rubbing up against something). Let's not forget that there is also belt(s) behind the Timing Belt cover as well as pullys and bearings associated with the timing system. You could start by removing one accy drive belt at a time (alternator, water pump, compressor, power steering, etc) to see whether or not the noise goes away in each case. If after each case, you discover the noise is still there, it's probably behind the timing belt cover (idler/tensioner pully, water pump shaft bearing, crankshaft bearing, etc.). Good Luck

Jun 29, 2009 | 2004 Hyundai Santa Fe

2 Answers

Cold cranking amps

I have a similar situation but it turns out that I am also having an unsolved problem with my 2005 Ford 500 electrical system. Although it could be due to a weak battery I have reason to believe that its root cause that something is wrong with the brake light system. Sometimes when I drive the brake lights stay on and other times they don't. Yesterday, with my foot off the brake pedal (in Park) the brake lights would stay on until I lifted the brake pedal. Today, I can not get it to repeat the symptom nor could an expert auto technican find the problem within several minutes. The battery has been tested and found to have 40% of its life(?) remaining.

Jul 25, 2008 | 2005 Ford Five Hundred

1 Answer

Dying while in motion

We had the same thing happen. Took to GMC mechanic who cleaned injectors and set idle up. Seems to work fine.

Jun 26, 2008 | 2001 GMC Yukon Denali

Not finding what you are looking for?
1999 Chevrolet Blazer Logo

165 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

76630 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8516 Answers

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

Answer questions

Manuals & User Guides