Thanks for the post. My 98 came up with the same error last weekend on the way down to the Indy 500. It was hot, but probably not as hot as you had it. Question though, what did the part look like that you replaced? Was it
this? The GM parts diagram on GMPartsDirect make it appear like this is all that you replaced. But if it is, you really over paid at $120. After market the modulator runs $20.