It doesn't have a relay but a flasher under the dash.
I believe its in the fuse box, top left, square metal plug in
The fuse box on a 1977 corvette is located at the top of the kick panel on the drivers side. It is just below the dash on the outside wall............7T77T7
A Corvette that was built in late 1976 up to late 1977.
Under the dash near the fuse block.
The relay is located in the pass. rear side of the car under the back window, next to the computer. It is a double relay.
It is in the tube going into the evaporator. You must disconnect the tube from the accumulator.
It does not have a starter relay. It has a starter solenoid mouted on the starter which serves a similar purpose.
On my '69, it's on the far right side of the firewall (passenger side).
what is the process for installing new seat covers in a 1977 chevrolet corvette
How do I replace the power window switch on 1977 Corvette coupe
I own a 1977 280Z automatic and the fuel pump relay is located above the kick panel on the right passenger's side floor in front of the door. You have to access it from under the dash.
Spark plug gap for a 1977 Corvette using ACDelco R45TS is .035