I hear a constant beeping only when i am moving not when sitting still even with motor running in my 2002 gmc sierra 1500, no alarm indicators on

If that is the case dont move. Just kidding.tell me about you truck. Do you have an alarm.are you turn signal off/is your cruise control off.do you have sirrus radio.is a cd still in the machine.pass seat belt buckle it even with no one there.any idiot .lights on dash

I just got this truck used. When I took a test drive it was quiet. After I started to drive it home the noise began. All 3 seat belts were hooked. The change oil warning came on with key. No other warnings were lit on dash. The next day I changed the oil but still I get the beeping. No turn signals were on, nothing I could see told me where/what is causing it. I have been a shadetree mechanic most of my life and I'm pretty good but this is outside my experience. Can't search out where noise is coming from because it only happens while in motion. Thanks for any help, Lamont

I have a 2018 Chevy Silverado 1500 and when I park it and turn it off there is a continuous beeping even after we get out and shut the doors. I can hear ur outside the truck.

Check your parking brake. I have a 05 tahoe and had the same issue. Sometimes the parking break isn't completely released so try that

It is the parking brake in all likelihood on the older GMs at least.