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93 Sub 5.7 K1500 Where is EST?

I want to set my timing. Having trouble finding the EST to disconnect.

Reply to
stevenlisonbee
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try behind the platic cover on the firewall on the pass side. It will be a brown wire with a black stripe. If not there check the large wire lume going to the ECM and look for a connector in a brown/black wire taped to the lume.

Reply to
ShoeSalesman

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