2007 Chevy Uplander no start

Vehicle cranked over twice thursday night -30f windchill. Replaced battery, now it cranks repeatedly but no spark. Can hear the fuel pump running. Had alternator tested at AutoValue. Tester passed alternator at 12.8v set point and 11.8V dc output despite tag on alternator stating voltage set point of 14v. Had it tested at Napa, no output. Tested at O'Reilly, passed at 13.4v dc output. Coil pack secondaries have proper continuity, haven't been able to locate a pinout for primaries. Any help will be greatly appreciated.