why does my truck lose power shortly after driving in rain?

Asked by 51dav_booT May 26, 2015 at 06:49 PM about the 2001 GMC Sierra 1500 SLT 4WD Extended Cab SB

Question type: Maintenance & Repair

When I scan I get code indicating #6 cylinder misfire. I recently replaced spark plug wires but it still does it. I look for any sign of moisture near plug and coil but they are dry. The truck has aprox. 175000 miles and runs great when on dry road.

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