all 2nd design: VIN ending in 27373 to 49213, alarm switch located in driver side door lock cylinder & alarm horn located behind driver side front fender, near firewall
TECH NOTES:
Distinguishing between 1st and 2nd Design 1977 Corvettes.
Shown below is information regarding 1977 (2nd Design) Corvettes as shown in Chevrolet Dealer Service Bulletin 77-I-38, Section XII, Dated May 1977:
Subject: Anti-Theft Alarm System Interim Modifications
Several modifications to the 1977 Corvette anti-theft alarm system were introduced into production effective March 21, 1977 with VIN 1Z37X7S427373.
(2nd Design) modifications are as follows:
- The actuating switch for the alarm system is no longer located on the left (driver's side) front fender. It has been incorporated into the left front door lock and must be activated by locking this door with the key from the outside of the vehicle. This is the *ONLY* way the alarm can be set. Turning the inside knob to the locked position when exiting the vehicle *WILL NOT* activate the alarm system.
- The anti-theft alarm system horn has been moved from the left (driver's side) rear inner fender to the far left side (driver's side) of the engine compartment dash panel.
- The anti-theft alarm system flasher assembly is now located on the console trim plate, rather than the rear compartment underbody panel.
- The new anti-theft alarm system wiring diagram has been modified to reflect these changes.
Chevrolet Motor Division
General Motors Corporation
CONNECTS TO:
- Air Conditioning Harness Connection (with A/C)
- Alarm System Flasher
- Alarm System Harness Connection
- Alarm System Relay
- Brake Light Switch
- Bulkhead Connector (passes through firewall)
- Center Gauge Cluster
- Cigarette Lighter
- Cigarette Lighter Ground
- Courtesy Light (driver & passenger side)
- Courtesy Light Switch (driver & passenger side)
- Courtesy Light Timer Connection
- Fuse Block
- Ground (to hinge pillar inner reinforcement)
- Hazard Flasher (fuse block)
- Headlight Dimmer Switch
- Headlight Switch
- Headlight Warning Buzzer
- Heater & A/C Control Panel Light Harness Connection
- Heater Harness Connection (without A/C)
- Hi-Beam Light
- Horn Relay
- Ignition Switch
- Instrument Cluster Ground
- Instrument Lights
- Neutral Safety/Backup Light Switch Connection (automatic transmission)
- Neutral Safety/Backup Light Extension Harness Connection (manual transmission)
- Parking Brake Warning Light Switch
- Parking Brake Warning Light
- Radio
- Rear Body Harness Connection
- Seat Belt & Key Warning Buzzer
- Seat Belt Buckle Connection (driver side)
- Shift Plate Indicator Light (not used on manual transmission)
- Tachometer
- Turn Signal Flasher
- Turn Signal Light (left & right side)
- Turn Signal Switch Connection
- Windshield Wiper & Washer Switch
Vehicle Fitment:
The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
| Make |
Model |
Years |
| Chevrolet |
Corvette |
1977 |
IMPORTANT: Electrical items are covered by a 30 day EXCHANGE ONLY WARRANTY. There are no returns or refunds on such items.
