NHTSA ID Number: 10198876
Manufacturer Communication Number: 21NA094
Summary
This service bulletin provides repair information to correct a customer concern of hood ajar message displayed on DIC, hood may not open using any electrical release buttons, but will open using manual release cable.
2 Affected Products
Vehicle
| MAKE | MODEL | YEAR |
CHEVROLET | CORVETTE | 2020-2021 |
Condition
Some customers may comment on a hood ajar message displayed on the DIC. The hood may not open using any of the electrical release buttons but will open using manual release cable.
Cause
The cause of the condition may be any, or a combination of, the bullets listed below:
- Possible water intrusion and terminal corrosion into connector X103.
- Water intrusion into the hood latch actuator itself.
- Failure of the auxiliary hood latch release switch.
Correction
Verify the Condition and repair following the steps in the Service Procedure below.
Parts Information
| Description | Part Number | Qty |
| ACTUATOR ASM-HOOD LAT | 84806924 | 1 |
| SWITCH ASM-HOOD LAT REL | 84720368 | 1, If necessary |
SEOCONTENT-START
Service Bulletin Bulletin No.: 21-NA-094
Date: May, 2021
TECHNICAL
Subject: Hood Ajar Message Displayed on Driver Information Center (DIC), Hood May Not Open
Using Any Electrical Release Buttons, But Will Open Using Manual Release Cable
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Chevrolet Corvette 2020 2021 — — All All
Involved Region or Country North America, Middle East, Japan
Condition
Some customers may comment on a hood ajar message displayed on the DIC. The hood
may not open using any of the electrical release buttons but will open using manual
release cable.
Cause
5795580
Page 2 May, 2021 Bulletin No.: 21-NA-094
5795581
The cause of the condition may be any, or a combination of, the bullets listed below:
• Possible water intrusion and terminal corrosion into connector X103.
• Water intrusion into the hood latch actuator itself.
• Failure of the auxiliary hood latch release switch.
Correction Verify the Condition and repair following the steps in the Service Procedure below.
Bulletin No.: 21-NA-094 May, 2021 Page 3
Service Procedure
5363245
1. Remove the front compartment front panel (1).
Refer to the appropriate Front Compartment Front
Panel Replacement in SI.
5795583
Page 4 May, 2021 Bulletin No.: 21-NA-094
2. Inspect connector X103 for possible terminal
corrosion.
• If corrosion IS noted at connector X103, replace
the connector as necessary. Refer to the
appropriate connector replacement procedure
in SI. After completion of the connector repair,
continue ahead to step # 3.
• If NO corrosion is noted at connector X103,
continue ahead to step # 3.
3. Access the hood switch connector (X102):
5795586
3.1. Remove the left horn (2). Refer to Horn
Replacement in SI.
5795588
3.2. Test the auxiliary hood latch release switch
with an ohmmeter. The switch should be open
when it’s not pressed and resistance should
be no more than .2 ohm, when the switch is
pressed.
• If the auxiliary hood latch release switch
passes the test, continue ahead to step
# 3.3.
• If the auxiliary hood latch release switch
fails the test, replace the switch. Refer to
Auxiliary Hood Latch Release Switch in SI.
After switch replacement, continue ahead
to step # 3.3.
3.3. Reinstall the left horn. Refer to Horn
Replacement in SI.
Bulletin No.: 21-NA-094 May, 2021 Page 5
5363519
4. Remove the hood latch actuator. Refer to the
appropriate Hood Latch Actuator Replacement
in SI.
Important: When reinstalling the front compartment
front panel, ensure that the X103 connector is
positioned below the right horn connector.
5. Install the new hood latch actuator service part.
Refer to the appropriate Hood Latch Actuator
Replacement in SI.
Parts Information
Causal
Part
Description Part
Number
Qty
X ACTUATOR
ASM-HOOD LAT 84806924 1
N/A SWITCH ASMHOOD
LAT REL 84720368 1, If
necessary
Warranty Information
For vehicles repaired under the Bumper-to-Bumper
coverage (Canada Base Warranty coverage), use the
following labor operation. Reference the Applicable
Warranties section of Investigate Vehicle History (IVH)
for coverage information.
Labor
Operation
Description Labor Time
1481538*
Hood Latch Actuator
Replacement, Includes
Test Auxiliary Hood Latch
Release Switch
1.7 hrs
Add
New Auxiliary Hood Latch
Release Switch
Replacement
1.0 hr
5430880 Connector with Leads
Assembly Replacement
Use Published
Labor
Operation
Time
*This is a unique Labor Operation for bulletin use only.
Version 1
Modified Released May 20, 2021
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Bulletin No.: 21-NA-094
Date: May, 2021
MC-10198876-9999.pdf 186.757KB
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- BUILDS A LASTING SHIELD AGAINST RUST AND CORROSION: Forms a moisture-blocking dielectric barrier that molecularly bonds to metal surfaces and subsurfaces; perfect for protecting trailers, marine gear, or tools stored in salt-heavy, humid environments.
- DELIVERS LONG-LASTING, MARINE-GRADE LUBRICATION: Clings to metal like a magnet and resists pressure, friction, and washout; ideal for lubricating locks, hinges, cable pulleys, and marine components exposed to heavy loads, rain, salt spray, tidal moisture, or constant vibration on boats and coastal equipment. DELIVERS LONG-LASTING, MARINE-GRADE LUBRICATION: Clings to metal like a magnet and resists pressure, friction, and washout; ideal for lubricating locks, hinges, cable pulleys, and marine components exposed to heavy loads, rain, salt spray, tidal moisture, or constant vibration on boats and coastal equipment.
- FREES RUSTED PARTS WITH DEEP PENETRATION: Industrial-strength penetrating oil releases corrosion on frozen bolts, marine fittings, and seized engine parts; penetrates to free up when other products fail in salty, humid, or wet environments on boats, farm tools, or machinery.
- PROTECTS ELECTRONICS AND PREVENTS GALVANIC CORROSION: Safe on circuits, battery terminals, and sensors, CorrosionX forms a dielectric film rated over 39,000 volts that displaces moisture and stops galvanic corrosion between dissimilar metals in harsh environments.
- QUALIFIED BY THE U.S. NAVY FOR ADVANCED MARINE CORROSION PROTECTION: Corrosion Technologies is the only manufacturer in the world with products — CorrosionX being the flagship — qualified under the Advanced Corrosion Preventive Compound military specification; protects outboards, terminals, and powerheads with a self-healing, moisture-blocking film.
- BUILDS A LASTING SHIELD AGAINST RUST AND CORROSION: Forms a moisture-blocking dielectric barrier that molecularly bonds to metal surfaces and subsurfaces; perfect for protecting trailers, marine gear, or tools stored in salt-heavy, humid environments.
- DELIVERS LONG-LASTING, MARINE-GRADE LUBRICATION: Clings to metal like a magnet and resists pressure, friction, and washout; ideal for lubricating locks, hinges, cable pulleys, and marine components exposed to heavy loads, rain, salt spray, tidal moisture, or constant vibration on boats and coastal equipment.
- FREES RUSTED PARTS WITH DEEP PENETRATION: Industrial-strength penetrating oil releases corrosion on frozen bolts, marine fittings, and seized engine parts; penetrates to free up when other products fail in salty, humid, or wet environments on boats, farm tools, or machinery.
- PROTECTS ELECTRONICS AND PREVENTS GALVANIC CORROSION: Safe on circuits, battery terminals, and sensors, CorrosionX forms a dielectric film rated over 39,000 volts that displaces moisture and stops galvanic corrosion between dissimilar metals in harsh environments.
- QUALIFIED BY THE U.S. NAVY FOR ADVANCED MARINE CORROSION PROTECTION: Corrosion Technologies is the only manufacturer in the world with products — CorrosionX being the flagship — qualified under the Advanced Corrosion Preventive Compound military specification; protects outboards, terminals, and powerheads with a self-healing, moisture-blocking film.
- RELENTLESS RUST PROTECTION FOR ANY WEATHER: This self-healing barrier clings and protects metal through rain, seawater, and pressure washing; it won’t drip, wash away, or quit, making it a reliable shield in even the harshest outdoor conditions.
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- SMART SCIENCE THAT BLOCKS HIDDEN DAMAGE: Polar Bonding locks onto surfaces to stop corrosion before it starts, preventing electrolysis and galvanic damage in places you can’t even see, from engine bays to salty docksides.
- RELENTLESS RUST PROTECTION FOR ANY WEATHER: This self-healing barrier clings and protects metal through rain, seawater, and pressure washing; it won’t drip, wash away, or quit, making it a reliable shield in even the harshest outdoor conditions.
- BUILT TO PROTECT FOR YEARS, NOT MONTHS: From boat trailers to barn doors, this long-lasting formula keeps working for up to 5 years indoors and 2 years outside; perfect for anyone who needs reliable rust protection.
- IDEAL FOR HEAVY-DUTY ELECTRICAL CONNECTIONS: Designed for larger terminals and connectors like battery posts and grounding lugs, this thick, non-conductive formula provides lasting protection without harming sensitive components, perfect where rugged sealing is needed.
- STAYS FLEXIBLE, NEVER FLAKES OR CRACKS: Forget waxy sprays that dry out and break down, this rust shield flexes with your gear, staying active and bonded even when machinery shifts, vibrates, or takes a beating in the field.
- SMART SCIENCE THAT BLOCKS HIDDEN DAMAGE: Polar Bonding locks onto surfaces to stop corrosion before it starts, preventing electrolysis and galvanic damage in places you can’t even see, from engine bays to salty docksides.
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