Question about 1999 GMC Sonoma

1 Answer

Sounds like some type of motor running (high pitched) with 4x4

I have a 2003 Chevy Avalanche and I can hear a high pitched sound coming from underneath the vehicle while idling. I have the 4x4 2hi button selected at the time, but when I select the 4hi button, the high pitch sound changes pitch for a split second but then returns to the original high pitch sound. The vehicles runs great with 74K miles and I rarely use the 4x4 mode. Why the sound?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 132 Answers

It is the fuel pump this is normal

Posted on Jan 30, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

High pitch grinding noise coming from motor when starting idling or driving


Seven ways to pinpoint that high-pitched, whining noise

www.losaltosonline.com/special-sections2/sections/on-the-road/45742-
Oct 2, 2013 - I recently had new fan belts installed after hearing a high-pitched, ... Do you hear the noise when the engine is running and the vehicle ... Just replaced water pump (and timing belt) yesterday and squeal ... When driving it make a noise but change out and caught speed the noise is coming from driver side.Missing: 1999 ‎plymouth ‎breeze

What is causing that irritating noise? ' DSMtuners

Troubleshooting Strange Sounds Coming from Your ...

www.dummies.com/.../troubleshooting-strange-sounds-coming-from-yo...
You hear a high-pitched squeal that stops when you shut off your engine: Readjust or replace the belt. These belts should have about half an inch of play and ...Missing: 1999 ‎plymouth ‎breeze

Nov 25, 2015 | 1999 Plymouth Breeze

1 Answer

There is a high pitched sound coming from under my 2002 Jimmy. It seems to be originating in the vicinity of the fuel tank, catalytic converter, differential area. But I cannot isolate it. Possibles?


Fuel pump in the tank makes a high pitch sound which is normal. Turn your key in the ignition, but don't start, you should hear the high pitch sound with the pump priming the system. You will still hear it when started, it's annoying but normal. Different brands are quieter than other, I just replaced mine with a Delphi brand fuel pump which is a tad quieter than AC Delco stock pump.

Mar 16, 2014 | GMC Jimmy Cars & Trucks

1 Answer

High Pitched ear ringing sound coming thru somewhere up front by navigator system


Some things I would check are do you have blue tooth in operation. Do you have any form of michrophone in the cab as it sounds like a feed back problem coming through your speakers. Talk to a radio techie to see what he thinks

Feb 23, 2013 | 2008 Jeep Grand Cherokee

1 Answer

My chevy avalanche aircon blower will not start on 1st to 4th only works on 5th speed. Chevy Avalanche 2003 model with 5.3 L


Sounds like a blower motor resistor. Not an expensive part, fairly easy for a mechanic to change. Located usually behind the glove box door.

Jul 15, 2011 | 2003 Chevrolet Avalanche

1 Answer

Bose radio comes on but no sound in my 2004 chevy avalanche.Sometimes even with radio off you hear a popping sound come from speakers. thanks


First Visually check all your fuses. Does rig have amp for stereo by any chance? It sounds like amp is bad and/or fuse is blown. Amp is wired between radio and speakers, and a shorted amp would make crackling in speakers when radio is OFF

Feb 26, 2011 | 2004 Chevrolet Avalanche

1 Answer

Have 93 Chevy G 30 Have a High pitch whine that changes with rpm


This could be anything from the pump in the transmission to the alternator bearings/bushings to the power steering pump. Could be an idler pulley bearing, but I doubt it.
Hint: If the noise is very high-pitched, check the alternator. If it is a lower, medium-high-pitch sound that changes some when you turn the wheels, check the power steering pump. If it is almost like a moan or a "Whooo" sound, that's the transmission pump.

Feb 23, 2010 | 1994 Chevrolet Sportvan G30

1 Answer

Chevy Avalanche GPS makes constant sounds


This is the GM bulletin for your problem: 06-08-44-034C.

You need to have your truck compared to another of the same type. If yours is louder it should be replaced.

Aug 30, 2009 | 2009 Chevrolet Avalanche

2 Answers

Truck Radio/CD Player, no sound coming out of speakers


Have you check the mute mode, maybe it is in mute mode.

Jun 01, 2009 | 2003 Chevrolet Avalanche

1 Answer

Wine noise


check ur berring it might sound like it comes from the engien but it might just be ur barrings

Aug 04, 2008 | 1995 Chevrolet Impala

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

319 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

61249 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

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

Answer questions

Manuals & User Guides

Loading...