Is it normal to have vacuum pump noise when in gear (automatic)

Hi all, I have the MBRP grill guard installed so I had to relocate my vacuum pump from the front bumper to the drivers side under the hood. 

I've had it relocated for probably a year an never heard it. I just moved from Michigan to Colorado (Yea!). Now I hear the pump once or twice for about two seconds every time I put it in gear. 

At least I assume it's the pump since that's the area the sound is coming from. Not sure if it was the cross country drive or the altitude here that changed so that I now hear it. 

Or maybe it's the sign of something wrong?