this should do it
On the top of the block near the left rear
INSTALLATION PROCEDURE NOTE: Refer to Fastener Notice in Cautions and Notices.
sorry comeing a storm here it kicks me offline...i think what you want ios the intake manifold also
Important: The intake manifold, throttle body, fuel injection rail, and fuel injectors may be removed as an assembly. If not servicing the individual components, remove the manifold as a complete assembly.DO NOT reuse the intake manifold-to-cylinder head gaskets.
Removal Procedure Caution: Refer to Battery Disconnect Caution in Service Precautions.
Caution: In order to avoid possible injury or vehicle damage, always replace the accelerator control cable with a NEW cable whenever you remove the engine from the vehicle.In order to avoid cruise control cable damage, position the cable out of the way while you remove or install the engine. Do not pry or lean against the cruise control cable and do not kink the cable. You must replace a damaged cable.
2001 5.3 liter chevy silverado complete breakdown to install knocks sensor
My name is Scott. I am a bit confused with the above. I will clear this up for you.
While you have the intake off, replace the coolant capillary o rings at each corner of the head. Also do yourself a favor and install the kinock sensor harness also.