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Re: UIM Problem
The problem was never really solved untill the Series III 3800 cake out and used the aluminum upper intake, its a Drive By Wire set up tho...
What GM did was revised the Stove pipe to be smaller so that there was an air gap between the EGR stove pipe and the nylon intake.. In both the Dorman kit and the APN kit an even smaller stove pipe is included... The APN kit has a stainless sleeve in the EGR port to help avoid the issues with the plastic deteriorating... These are installed on my cars... I have had no issues to date..
I highly recommend the APN kit...
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