naildrvr
Senior Member
I've got a 2011 Suburban with 136k miles. Earlier this week it started making a slight whining noise that was more audible when accelerating. Now it can be heard when the engine is first started. Could it be the transmission pump going bad? The whining noise seems to be a common problem, but I haven't found an answer to the root of the problem. Anyone have any knowledge of this? Thanks in advance.