My pedal is doing that knocking sound also.
It started doing this when I brought my hummer to the dealer to check the rattling noise in the front passenger side near the air intakes. They told me that when they were checking the rattling noise near the air intake area, they pressed the gas pedal and brake at the same time to reach 3000 rpm to replicate the rattling noise. Somehow I think pressing the gas and brake at the same time caused the pedal vibrating/knocking problem. Could this knocking sound in the pedal be caused by the brakes/rotors???? Anyone?
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by RMST:
I have 1500 miles and I'm experiencing the exact same issues. Going to try and get over to Lynch Hummer next week. I'll let you know what they say. </div></BLOCKQUOTE>