2003 GMC Sierra 1500 Engine Shudder/Vibration


#1

Since bought new, this vehicle has an engine shudder/vibration that occurs routinely at about 42mph thru 45mph. Also, with light pedal pressure from a stop, around corners and while going slow thru parking lots. More noticeable during cold weather. Any ideas?


#2

Do you mean it happens at about 45 mph and while driving slow (and straight?) in a parking lot and while turning (at what speeds?) ?

Could it be described as a "clicking?"

#3

I’m going to suggest a loose or possibly cracked vacuum hose or other air intake (loose plenum bolt).