2013 5.3 swap in a 2008 Yukon now high idle issues

[nacho55]

So this weekend I helped my buddie swap out a high mileage 5.3 from his 2008 Yukon with a 5.3 from a 2013, everything looked identical and plugged in the same except the new motor had an additional sensor below the water pump in the middle of the timing cover near the sensor below the water pump to the left if facing the motor. Well it starts and idles a little high in park around 1100-1200 but soon as you give it any gas it revs up and then revs up to 4-5000 and just stays until you turn the key back off.. We tried both throttle bodies and everything seems to be hooked up fine and no leaks but not sure on this. Sorry for the long winded question
Any ideas would be appreciated
Thanks