@Zlambert99 I have not had to do much on those engines yet… Access is very tight though so I would be very tempted to remove the cab. A lot of stuff has to come apart to remove it out the front.
@Zlambert99 check out my cab removal tips video. The cab is actually not that bad to remove. Cab Removal Tips - 3.0L Duramax LM2 P0016 Timing Chain PART TWO ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-bIXg9XYX6Bk.html