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1975-77 Corvette Tachometer Circuit Board

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$54.95 $49.95
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1975-77 Corvette replacement Tachometer Circuit Board. Easy to install direct replacement. Diagnostic LED option.

Replacement Tachometer Circuit Boards for 1975-77 Corvette.

  • Pre-Calibrated and ready to install.
  • Easy bolt on installation.
  • Adjustable RPM readout.
  • Direct replacement for the original GM Circuit Board.
  • Includes installation instructions.
  • Manufactured in the USA with top quality components.
  • Designed to exceed the original GM circuit board in component quality.
  • Manufacturer lifetime warranty.
  • Diagnostic LED indicators option. Choose if you want the LED indicators enabled [+$10.00]) { option selected above}

Application: 1975-55 Corvette. 


  1. What is an LED? It is a Light Emitting Diode.
  2. What is the Diagnostic LED option for? The diagnostic LED's can be used to help diagnose Tachometer circuit problems (more details below).
  3. What is the difference between the circuit board with LED's and without LED's?  The circuit board with the LED's has the Diagnostic LED circuits installed. The circuit board without the LED option does not have the Diagnostic LED circuits installed
  4. Will this work with my original tachometer and gauge cluster?  Yes. Installation is simple unbolt the old circuit board from the tachometer, and bolt the new circuit board on to the tachometer.

LED Indicators option (If selected when ordering):


LED option

If you ordered the LED indicator option, the LED's can be used to help diagnose Tachometer circuit problems. They indicate if the power circuit is completed and if the RPM signal circuit is completed respectively.

For example, If the RPM signal was nonexistent, the LED would not light. If the signal was intermittent, the LED may flicker. If the circuit board was not receiving power, the Power LED indicator would not light. In this way the LED's are useful to help with diagnosing tachometer problem related to the power and RPM circuits.

Installation Note: Installation is fairly easy. There is no soldering involved. The old tachometer circuit board is attached to the tachometer with nuts. Includes installation instructions. Comes Pre-Calibrated and ready to install.

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Shipping Cost:
Calculated at Checkout
Direct replacement
Pre-Calibrated and Ready to install
1975-77 Corvette
Diagnostic LED's