× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
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