6 months and ~$210 later at a local independent shop, got all 4 sensors swapped out (dealer wanted $480 to do 3 sensors ).

PSA: If you don't already, check your lugs to make sure they are torqued to specs after you get them back from the shop. They are notorious for going trigger happy with the airgun. I was hopping on the tire iron to get some of my lugs off.

 

I think they have a 500lb gorilla that tightens the lug nuts.

I always laugh when I get new tires and it says they were torqued to xxx ft. lb. Sure!

Just got new tires on the Challenger and it said torqued to 135 ft. lb.!! They are supposed to be 110. I set my torque wrench to 150 ft. lb. and they were much tighter than that.

I did my own sensors last summer on the Suburban. It sure was hard to break the bead but very easy to swap the sensor.