How can I identify a MAP Sensor by the markings on the case? None of the case markings match the 8 digit AC Delco #. Is there a cross reference chart for the 5.7L MAP Sensors to other GM MAP Sensors?

 

There are hot stamped numbers on the front ledge above the connector. The TPI MAP will have either a 460 or 039 stamped on it (numbers from memory, hope I have them correct). This is the same sensor that is used on many SD GM systems, cars & trucks.

The other method of ID is the connector insert. They are color coded, green and black are the 039 and 460 sensors. IIRC, orange being 2 bar. Then gray and/or blue for a CCC baro sensor. And red for ??

RBob.