Thankyou for a very good site. I cant afford repairs as i will be homeless soon. i only have my car left...... hummer makes clicking ..loud as i accelerate .. eems to be coming from wheel area not engine ...loud when slow but may be less obvious at speed. i read all your suggestions ..helpful. It seems intermittent tho.. happened a few weeks ago and then disappeared .. now back.. doesnt happen when vehicle is still and revved up.....Had oil change ..... same........... did have 2 new tyres weeks ago and rotation . ......... problem came some time afterwards . Noted your suggestion s and will check lug nuts with tyre guy...... Iam a female and do not want to be taken advantage of ...... so what do You think it may be .. i read all the sound diagnosis stuff.. great but wanted an opinion . thankyou so much for your time .. Iam desperate and homeless soon , So I need my car to be safe and running so i can sell it and get money to live on ........ ..thankyou... An appreciative drver..... Jamp.