1994 GMC C1500 Pickup. The underhood label says the Connector is located under the hook behind the relay cover, however i can't find it. Can anyone help me locate the ESC disconnect?

Should be a brown wire with a black tracer...the connector is usually taped to the big haness under the relay cover in the engine compartment.
If for some reason its not there, some trucks had the same wire under the passenger side of the dash around the glove box. Look around where the carpet meets the A/C box