98 yukon how to remove PCM wiring harness

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OilBurner2003

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I'm sure you've seen my name on these forums for just about every 98 Yukon page here. I thought my problems ended when I brought it to the mechanic, I was wrong, Now I'm back chasing 02 sensor wiring to the pcm. Does anyone know how to remove these blue clips? I just wanna take a peek and see how the connections look. Thanks!
 

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