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The 1500 Chevy Silverado has two knock sensors. There is one on each side of the block halfway between front and back.
The knock sensor on that vehicle is located under the intake manifold. The intake manifold must be removed to gain access to the knock sensor.
under he intake manifold
You can run a diagnostic test for the knock sensor, on your 2005 Chevy avalanche, by hooking the engine up to a diagnostic tester.
The 1997 Chevy 1500 pickup truck 5.7 liter engine knock sensor can be found on the front of the engine. You will need to remove the front engine cover in order to access the sensor.
The 2001 Chevy Express Van crankshaft sensor will be on the back of the engine. You will need to remove the rear engine cover in order to access the crankshaft sensor.
Speed sensor is on the back side of the transmission (passenger side).
In the distributor.
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