Knock sensor location confusion

[Blazin Blake]

Discrepancy on location, I am convinced there are two total but location is not clear. 

Are they under the manifold or in bank 1 and 2 alongside motor? I have the 2011 4.8L, WT, 4x4. 

 

Any help would be greatly appreciated before I get too involved. I am hoping they are on the sides because, then I only need to remove wheel well coverings to access, if not that intake manifold does not look fun, albeit I did replace one on a Chevy Trax once successfully (Tags and kids paint keep the hoses in the right place, LOL!).

 

Thank You, Blazin Blake

[Ianf]

there is one on each side of the engine block. they are not under the manifold as they were in the older engines. Cheap and easy to replace, just do not over torque them.

[davester]

Yeah, your 2011 is a gmt900 platform truck, which has the knock sensors on each side of the engine, near the oil pan.

 

Trucks from '99-'07 classic had them under the intake manifold.