Quote:
Originally Posted by pdsq99f4
The case relearn is a crankshaft position variation relearn. If you don't do it, you may get a check engine light because the pcm is reading false misfires because it hasn't been learned to the crankshaft position variation. Any time you mess with the pcm, crank position sensor, crank, this should be done. Sometimes you can get lucky and it won't set a check engine light, but most times you have to do the relearn. If there is any GM dealers there with a tech2 they can do it for you.
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I believe the PCMForLess PCM disables the check engine light until the CASE relearn (I was checking the instructions yesterday, might have to buy one myself). It might be worth the $$ to just buy the new PCM outright to make the truck driveable. Then, you can ship the original PCM back to the states for repair. Of course, if it was something OUTSIDE the PCM that is causing the problems, you'll know pretty quick because the PCM will throw the same codes and you may have the same problems. Given that it probably cost serious $$ to import the H3, I say just buy the PCM and see what happens.