How do I get my vehicle out of diagnostic mode if I've already disconnected the ground cable once

Asked by Guru8FNW May 03, 2017 at 05:04 PM about the 1989 Chevrolet S-10 EL RWD

Question type: Maintenance & Repair

I have a 1989 Chevrolet S10 2.5 EL standard cab
manual 5 speed 4x2

1 Answer

223,905

Try pulling the ECM fuse for just over 1 minute. This should reset it back to factory settings. It should be a blue 15A fuse.

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