Quote Originally Posted by dharris894 View Post
Nice catch -

Rockauto says that part 10456288 is correct for my truck without saying whether its manual or Auto.

When I go to GMpartsdirect 10456288 is for "[FONT="]Manual trans. Thm 700-r4/4l60" and is not right for my truck. Part #104456549 is for "[/FONT]Auto trans. Thm-r2/4l80. 4l60e, electronic" and this is not available at RockAuto
You may want to review Rockauto again. It has a listing for both sensors differentiated by the manual and automatic transmissions.