Have a 2002 Cadillac Escalade AWD 6.0 Knock sensor intake manifol

souinds like a break in the wire connector to the coils . id randomly check each line every 1 inch with a probe tester and see if the line isnt dead .

no bypass to beat smog - emissions test didnt specify engine 4 8 5 3 6 0 knock sensor replacement GM Escalade 2004 knock sensor location and these links can assist in replacing sensor

Nathan, 2 Knock's are located under intake manifold.
Check the attached links,
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How To Install Replace Engine Knock Sensor 2000 06 5 3L Silverado Sierra...

Knock sensor 5 3 4 8 6 0 replacement

05 Chevy Avalanche Knock Sensors

4 8 5 3 6 0 knock sensor replacement GM

UNDER INTAKE MANIFOL

1. Remove the intake manifold.

1. Disconnect the knock sensor electrical connector.

1. Remove the knock sensor (KS).

Installation Procedure

.

1. Install the knock sensor.Tighten
   Tighten the knock sensor to 25 [n-m] (18 lb ft).
   
2. Connect the knock sensor electrical connector.
3. Reinstall the intake manifold.
   this is quite a job and i would not reccomend a novice mechanic to preform this repair book time is about two hours for this repair hope this helps

The knock sensor is located under the intake manifold to replace do the following
Disconnect the negative battery cable.
Remove the intake manifold.
Disconnect the sensor connector.
Remove the sensor from the engine block.
Installation is the reverse of the removal procedure

• Verify the resistance of the knock sensor (compare it to factory specs)
• Inspect for broken/frayed wires leading to the sensor
• Check the wiring and connections leading to/from the knock sensor and PCM/ECM
• Verify proper voltage is reaching the knock sensor (e.g. 5 volts)
• Verify proper grounding of sensor and circuit
• Replace the knock sensor
• Replace the PCM/ECM

Beneath the intake manifold, which has to be removed to gain access. After removing, you'll see a plate with 2 circular covers with wires coming out fo them. Both of these are your knock sensors.

located underneath the intake manifold remove it and disconnect the knock sensor unscrew the knock sensor. installation is reverse

what sensor specificaly u looking for?