12575182 - Camshaft Position Sensor 01-03 8.1L

The camshaft sensor and gears on the early (2001-2003) GM 8.1L were problematic and can cause this sort of issue, even with a replacement sensor. The first thing I would do if you haven't already, is have a crankshaft relearn done with a scan tool. This will "re-sync" the two sensors with each other and could resolve the issue. You should also closely inspect the pigtail connector that goes into the sensor, the terminals inside them sometimes get pushed back and won't make a good connection. Another option would be to upgrade your camshaft sensor to the later (2004+) GM 8.1L design: 12575182-UPDATE - Camshaft Position Sensor Update Kit For 2001-2003 GM 8.1L

Hi Brian,

    I don't see that coming up as a valid code for that chassis. Can you double check the code and let us know?

We have no way to look this up but it should be correct as I don't think the marine 8.1L's had a different camshaft.

This is a factory GM sensor and once our inventory is gone we will no longer be able to get them. Most 2001-2003 model year engines used 12575182 but there are some that used 12575183. Since we can only look up Workhorse VIN's I can't tell you which your engine came with.

Yes this part is the same and will work for your truck. GM discontinued it but Workhorse still had stock on hand but once these are depleted I don't believe we will be able to get anymore.