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International Automotive Technicians Network
Re: GM Direct Injection Injector Replacement
Posted to Technical Theory Forum on 11/7/2023

Great question. The scan tool injector balance test isnt very accurate. You may run it a dozen times and get different results. I have had the same symptoms you describe before on an auction vehicle. Here is what I found useful to do.

First do a CKP relearn ... Login to read more.