Our SES light just came on (2001 Sub 8.1L) and I pulled a P0342 with my scanner.

P0342 - Camshaft Position Sensor Circuit Low Input

TSB: 01-06-04-012

Does anyone know what the details of the TSB are?
How do you test the CMP sensor (CPS) to see if it is defective?

Where is a cheap place to get one?

Thanks.

--Eric

Malfunction Indicator Lamp ON with a DTC P0341, P0342, P0343 (Replace Cam Sensor) #01-06-04-012 - (Feb 28, 2001)

</TABLE>Malfunction Indicator Lamp ON with a DTC P0341, P0342, P0343 (Replace Cam Sensor) 2001 Chevrolet and GMC C/K and G Light Duty Models
2001 Chevrolet and GMC B7, C6, C7 Medium Duty Models
with 8.1 L Engine (VINs E, G -- RPO L18)
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=784566&evc=numSrch#ss1-784566">Condition

Some owners may comment that the Malfunction Indicator Lamp (MIL) is illuminated. The vehicle will exhibit no unusual driveability characteristics.
Upon further diagnosis, the technician may find an active or stored DTC P0341, P0342, P0343 in the PCM.
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=784566&evc=numSrch#ss2-784566">Correction

Verify the cam sensor operation using the appropriate Service Manual diagnostics. If the diagnostics show that the cam sensor is the suspect component, replace the cam sensor with the following part number. Refer to the applicable Service Manual for removal and installation of the cam sensor.
<A href="http://service.gm.com/servlets/BlobShtml?ShtmlFile=784566&evc=numSrch#ss3-784566">Parts Information

<TABLE width="100%" border=1><TBODY><TR><TH vAlign=bottom align=middle>Part Number
</TH><TH vAlign=bottom align=middle>Description
</TH><TH vAlign=bottom align=middle>Qty
</TH></TR><TR><TD vAlign=center align=middle>12572656
</TD><TD vAlign=center align=middle>Cam Sensor
</TD><TD vAlign=center align=middle>1
</TD></TR></TBODY></TABLE>Parts are currently available from GMSPO.