TX1100F Posted August 9, 2009 Share Posted August 9, 2009 So I have this: ElmScan USB I need something that can run the "Crankshaft Position System Variation Learn Procedure" on a 1998 GMC Z71 (5.7L). Free would be ideal. Cheap will work too. Any suggestions? please don't say GM stealership... :icon_pray: Quote Link to comment Share on other sites More sharing options...
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