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Charlie, I am pretty sure. My '87 was my first vehicle, and it and my 2000 Ram are the only two vehicles I have ever owned.
I remember when I first read about obtaining trouble codes (from a Haynes manual of all places ) and being amazed my truck was able to do such a thing. If I still had the factory instrument cluster, I would look to see which light it was that flashed. It was not a 'check engine' light, there was no such animal. All I recall is it was a red light in teh middle/left of the cluster.
-S/6

No, the 'eng maint' light was seperate animal. I discovered that lovely little item about 1 week after the engine was first rebuilt, and reset the button and replaced the 9 volt battery.

I remember cycling the ignition and having codes flashed at me, I just do not remember which light in the cluster it was. It was nearly 10 years ago.