Cam Sensor

[BuickTV6]

Hey guys, I gotta change my cam sensor and it looks like the coil pack has to come off to gain access to it. Is that true? Or is there a secret to getting it off?

 

[BuickTV6]

This is frustrating! Looks like the only way I can get to this cam sensor out is to take the coil pack off. I cant find the right wrench size to get the nut that holds the coil pakc bracket onto the intake? anyone the proper size? I thought it was 9/16 but its a little small. and i cant find the right one

 

[6SENSE]

coil/mod bracket:
intake stud nut = 15mm; header stud nut = 13mm; water pump stud nut = 13mm; module-plug bolt = 1/4"