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mp28560 -> secondary air injection pump (2/29/2008 3:17:35 AM)
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Help!. I have a 2004 Trailblazer 4.2. I am on my second pump. The first one a dealer replace and just told me it was a bad pump. Then the check engine light came on again with the same code. This time I looked at it. When I took the line off water came out.The pump was completely full of water. No one can tell why this happened or how to fix it. I replace the check valve on the block and replaced the pump. I had it reset and light came back on with the same code (p0410).
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