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Old 01-29-2013, 05:25 PM
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The holes looked black but not blocked. I didn't probe down onto the holes though.
Part 1 -How to Test the GM EGR Valve (P0401, P0403, P0404, P0405, P1404, P1406).[/QUOTE]

Thanks cdminter59. This is the kind of info I need.
I will run through these tests. Looks like this should diagnose the problem. I do have a code reader, so that should help.
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