I recently put together a LS3 with a E67 ECM and am using a 5 pin MAF sensor (15865791) with an 08 trailblazer program.

It has the yellow wire from the MAF going to pinout 67 on the ECM which has been confirmed as being a good circuit. The problem is a code P-0102 saying there is a problem with the MAF sensor. Therefore the MAF was changed with a new GM sensor. It is still showing bad during the scan, even after changing the sensor.

The MAF wiring color codes are as follows: A-Black, B-tan, C-black/white, D-pink, E-yellow.

Could it be that the ECM is bad or could the wiring be wrong.

Operation of the car seem to be ok but the starts are never on the first attempt. Always at least the second attempt.

One more thing, the fuel pressure was tested and is holding.

any help is appreciated.

T