ok i have a little issue, more of an inconvenience rather than an issue actually.

long story short my SES light does not work. after testing the cluster, the wiring, and EVERYTHING in that circuit ive come to the conclusion that my PCM is not grounding that circuit ( its a always hot, ground controlled circuit). now i was able to splice into the ground side of this circuit right at the cluster and can turn the light on with a toggle switch, funny how i passed smog by using a switch.

My questions are:

1) has anyone ever ran into this before?
2) where is the best place to get a new PCM or get this one fixed (possibly tuned?)
3) if i were to get one from the junk yard, what needs to be modified/relearned in the PCM to make it use able and how would i go about doing so?

also im afraid that my PCM might not receive data from other system, i ran an EGR test with an OBDII scanner, turned it up to 100% and motor didn't die out like it should. since then i have taken out my EGR and cleaned it but am yet to retest. just a thought.

Any input would be great!=]

-Mike

 

i got a stock pcm i seen one sell in here for 30 bucks i think you have to have them flashed for you vin number but im not sure my pcm is out of a 02 if you can use it on your 98 you can have it 30 bucks plus shipping or if your close by new castle indiana come pic it up

 

is it black with 4 connectors or a grey one with 2?

 

its grey delphi 2 plugs

 

yea cant use it, i need the black one with 4 plugs.

thanks anyways man

 

sorry dude

 

There are a lot of other GMC/Chevy products with that PCM. Try a pick n pull & look for anything of similiar year & with a 4.3L.
Take down the serial # or code for that PCM & start looking.
There was also a recent posting for a PCM ground pin, maybe try searching for that, it may be of help.