# High-Pitched Continuous Tone **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** noises\ **Created:** [December 20, 2007, 3:50pm UTC](https://community.cartalk.com/t/high-pitched-continuous-tone/8521 "2007-12-20T15:50:42Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Emma\_Kastrup](https://avatars.discourse-cdn.com/v4/letter/e/c68b51/32.png) [@Emma\_Kastrup](https://community.cartalk.com/u/Emma_Kastrup)\ **Post date:** [December 20, 2007, 3:50pm UTC](https://community.cartalk.com/t/high-pitched-continuous-tone/8521/1 "2007-12-20T15:50:42Z")
My son bought last week a 2005 GMC Safari with 80,000 miles for his business. As soon as this vehicle is turned on and running and continue till turned off, there is a high-pitched continuous tone occurring from somewhere near the middle to the end of the vehicle. What could possibly be the source and how is it corrected? ---
**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\ **Post date:** [December 20, 2007, 5:34pm UTC](https://community.cartalk.com/t/high-pitched-continuous-tone/8521/2 "2007-12-20T17:34:58Z")
When idling or driving? 4.3L? ---
**Author:** ![mr\_josh](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mr_josh/32/3008_2.png) [@mr\_josh](https://community.cartalk.com/u/mr_josh)\ **Post date:** [December 20, 2007, 5:59pm UTC](https://community.cartalk.com/t/high-pitched-continuous-tone/8521/3 "2007-12-20T17:59:02Z")
If the car is off, and you turn the key to the On position (not start, just on), do you hear the whine? I’m thinking fuel pump. ---
**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\ **Post date:** [December 20, 2007, 7:41pm UTC](https://community.cartalk.com/t/high-pitched-continuous-tone/8521/4 "2007-12-20T19:41:39Z")
Another vote for a failing fuel pump, unless the sound varies with road or engine speed.