I need to replace a camshaft sensor in a 99 silervado where is it

have you check for trouble codes...blinking check engine light is for a misfire

The camshaft position sensor is located on top of the engine near the ignition coils.
The camshaft position sensor is located on top of the engine near the ignition coils.
The camshaft position sensor is located on the engine near the timing belt cover and under the upper radiator hose.
The camshaft position sensor is either located near the top of the engine, passenger-s side, or on the right side of the engine near the ignition coils.
The camshaft position sensor is located on the engine near the camshaft pulley.
This sensor is located at the front of the engine near the camshaft gear this is what I got 6 different locations manual covers 99-05

Here you are!
http://www.ebay.com/itm/New-Camshaft-Position-Sensor-Honda-Accord-Acura-CL-2003-99-98-97-MDX-Pilot-1999-/230957139252

P0340 JEEP - Camshaft Position Sensor Circuit engine cylinder Bank 1 Sensor 1

Possible causes- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Faulty Camshaft Position Sensor
- Faulty starter motor
- Starting system circuit
- Dead (Weak) battery

Sometimes and in some models, low battery voltage or a weak starter can can trigger a Camshaft Position Sensor code.

Read more: http://engine-codes.com/p0340_jeep.html#ixzz25iQflrEb

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The camshaft position sensor is installed in the timing belt housing cover above the left camshaft sprocket.

Removal:

1. Disconnect the negative battery cable.

2. Remove the upper intake plenum.

3. Disconnect electrical connector from sensor.

4. Remove camshaft position sensor bolt.

5. Pull sensor up out of the timing belt housing.

Installation:

If the removed sensor is reinstalled, remove the old spacer from the sensor face, Attach a

new spacer to the face of the sensor.

If installing a new sensor be sure that the paper spacer is attached to the face.

1. Install sensor in the timing belt housing and push down until contact is made with the camshaft sprocket. While holding down in position, install and tighten bolt to 12 N.m(105in.lbs) torque.

Hook up electrical connector.

Connect Negative battery back up.

Regards, Lee Davidian

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cam sensor is in distributor. has optical sensor below lotted wheel. famous for failing when hat in 99 modle year. Need to replace distributor. $200 on ebay for reman. Bearing goes too.

CAMSHAFT SENSOR BUILT IN THE DISTRIBUTOR.

If you still have a cap rotor and ignition wires, it's inside the distributor. If not, it is the part where the distributor used to be (center rear of the engine behind the intake manifold)

It's in the distributor. There is 2 connectors on the outside of the distributor to it. Make sure they are both connected before replacing parts. The gear on the distributor wears out too.

that appears to be a camshaft position sensor performance code. you can start by checking to see if the sensor is working properly, re-check and make sure that the harness is ok by checking the resistance through the harness if all looks well there make sure the computer has the latest software on it by having it scanned at your local dealer. also you can check the reluctor wheel on the camshaft for damage or debris in the way of the sensor.

hope this helps!