Camshaft sensor

[Zhodges13]

Hey guys, I am new to this particular forum. I just started driving my dads 1997 gmc Sierra. The shop says that the camshaft sensor needs to be replaced. I'm not confident is where exactly this sensor is. I know it's on the passenger side but I'm not sure where exactly. Can anyone give me any advice or help on this.

 

Again I'm sorry if this thread has already been started but I couldn't find anything about this old of a truck on here.

[grampadirt]

It's in the distributor.