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Re: GM J39021 Injector tester
Posted to Tool & Equipment Forum on 11/9/2012

Hi Martin,

Thank-you for the information. I should have that tool but it isn't in our tool room and no one knows the last time it was around. I am working on a 2012 Silverado but I'm testing the Exhaust diesel fuel injector as per Doc# 2890789. Which only says to use J39021 tester and only gives flow results but no time frame. I assume that tester has a set pulse time for its inj. test but I can't find anywhere what that time is.

Jason Kari
Hersrud's of Belle Fourche
Belle Fourche, South Dakota, USA