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<blockquote data-quote="PoManNox" data-source="post: 30721" data-attributes="member: 8300">I'd be curious to see how GM recommends accessing the T-case motor/module.&nbsp;&nbsp; Like you say, it's on top of the T-case with no access.&nbsp;&nbsp; Probably have to remove exhaust and the T-case itself.&nbsp; What is your thoughts on it being this motor/module?&nbsp;&nbsp; In my mind, it either works or it doesn't.&nbsp; It's a linear actuator that slides a collar back/fourth.&nbsp; Kind of an 'on, off' situation.&nbsp; I assume it has some type of feedback to the PCM, telling the PCM what position it's in and will set codes if it's not in the position being called for.No presence of metal on the drain plug magnets is a good find.&nbsp;&nbsp; When I first changed these fluids on my 2021 @ 3yrs and ~32K miles, I don't recall the oil looking as bad as it does on most vehicles equipped with a PTU/T-case.&nbsp; &nbsp; As I recall, both the fill and drain plugs had magnets on them on my 2021.</blockquote>

[QUOTE="PoManNox, post: 30721, member: 8300"] I'd be curious to see how GM recommends accessing the T-case motor/module. Like you say, it's on top of the T-case with no access. Probably have to remove exhaust and the T-case itself. What is your thoughts on it being this motor/module? In my mind, it either works or it doesn't. It's a linear actuator that slides a collar back/fourth. Kind of an 'on, off' situation. I assume it has some type of feedback to the PCM, telling the PCM what position it's in and will set codes if it's not in the position being called for. No presence of metal on the drain plug magnets is a good find. When I first changed these fluids on my 2021 @ 3yrs and ~32K miles, I don't recall the oil looking as bad as it does on most vehicles equipped with a PTU/T-case. As I recall, both the fill and drain plugs had magnets on them on my 2021. [/QUOTE]

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