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NHTSA ID Number: 10113944
Manufacturer Communication Number: PIC5984B
Summary
This Preliminary Information communication provides information to the technician the steps needed to diagnosis and repair vehicles with a noise can be heard from the dash area while the engine is running. Some vehicles may have a heater with reduced performance. Technician will gain access to the heater core inlet hose and remove it. There will be an inlet screen installed in the core that may be plugged with debris, causing this noise. If debris is present clean the screen or replace it. The vehicles coolant system will need to be flushed if debris if found. If a lot of debris is found in the inlet screen, back flush the heater core as well. Do not replace the heater core for a noise issue.
6 Affected Products
Vehicle
| MAKE | MODEL | YEAR |
| CHEVROLET | CAMARO | 2010-2015 |
Condition/Concern
Noise can be heard from the dash area while the engine is running. It may be a hiss noise or a gurgle noise that can be heard. Raising the engine RPM may or may not change the sound of this noise. The heater has reduced performance. This is usually noticed while the vehicle is idling.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIC5984B
Date: Mar-2016
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NHTSA ID Number: 10113943
Manufacturer Communication Number: PIC5984A
Summary
This Preliminary Information communication provides information to the technician the steps needed to diagnosis and repair vehicles with a noise can be heard from the dash area while the engine is running. Technician will gain access to the heater core inlet hose and remove it. There will be an inlet screen installed in the core that may be plugged with debris, causing this noise. If debris is present clean the screen or replace it. The vehicles coolant system will need to be flushed if debris if found. If a lot of debris is found in the inlet screen, back flush the heater core as well. Do not replace the heater core for a noise issue.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIC5984A
Date: Mar-2016
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NHTSA ID Number: 10111796
Manufacturer Communication Number: PIC5984
Summary
This Preliminary Information communication provides information to the technician the steps needed to diagnosis and repair vehicles with a noise can be heard from the dash area while the engine is running. Technician will gain access to the heater core inlet hose and remove it. There will be an inlet screen installed in the core that may be plugged with debris, causing this noise. If debris is present clean the screen or replace it. The vehicles coolant system will need to be flushed if debris if found. If a lot of debris is found in the inlet screen, back flush the heater core as well. Do not replace the heater core for a noise issue.
1 Associated Document
Manufacturer Communications
Bulletin No.: PIC5984
Date: Apr-2014
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NHTSA ID Number: 10073728
Manufacturer Communication Number: PIC5984
Summary
SUMMARY TO BE PROVIDED ON A FUTURE DATE.
1 Associated Document
Service Bulletin Document
Bulletin No.: PIC5984
Date: April, 2014
SB-10073728-9133.pdf 222.311KB
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- VERSATILE ENGINE COOLANT: This antifreeze + coolant is designed for use in all GM vehicles 1995 and newer requiring an orange organic acid technology (OAT) coolant. This item contains a bittering agent called Denatonium Benzoate.
- PROTECTS ENGINE: This antifreeze + coolant provides protection against rust and corrosion for all cooling system metals, including aluminum
- LONG-LASTING COOLANT: This antifreeze + coolant has a service life of up to 5 years/150,000 miles with a complete cooling system flush and fill
- BETTER FORMULA: Our antifreeze coolant solution is free of amines, phosphate, borate, nitrite and silicate
- EXCELLENT PERFORMANCE: This meets the performance requirements of ASTM D3306, D4985 and GMW3420, GM6277M
- Unsurpassed freeze protection and anti-boil performance outperforms industry standards
- Organic acid technology resists rust, scale & corrosion while protecting all cooling system metals (including aluminum)
- High-quality additives protect against leaks and won’t harm gaskets, hoses, plastics or original vehicle finish
- Orange concentrate formula should be mixed with clean tap water or demineralized water at 50/50 ratio for temperatures -34 to 265F; 60/40 for -62 to 270F; and 70/30 for -84 to 267F
- 5 year/150,000 mile guarantee protects against engine failure caused by freeze-ups or boil-overs
- Unsurpassed freeze protection and anti-boil performance outperforms industry standards
- Organic acid technology resists rust, scale & corrosion while protecting all cooling system metals (including aluminum)
- High-quality additives protect against leaks and won’t harm gaskets, hoses, plastics or original vehicle finish
- Pre-mixed orange formula is ready-to-use in a 50/50 ratio with deionized water to protect all modern engine components from winter freezing (-34F) and summer boiling (265F).
- 5 year/150,000 mile guarantee protects against engine failure caused by freeze-ups or boil-overs
- ACDelco 10-101 DEX COOL (ORANGE)
- Contains A Bittering Agent
- OEM
- Contains a bittering agent
- ZEREX DEX-COOL antifreeze coolant is approved by General Motors
to the GM 6277M specification - ZEREX DEX-COOL antifreeze coolant contains no phosphates, silicates, borates, nitrates, amines and nitrites
- Valvoline ZEREX DEX-COOL antifreeze coolant is a patented* carboxylate formulation with a service life of up to five years or 150,000 miles
- When diluted 50% with water, ZEREX DEX-COOL protects modern engine components from winter freezing and summer boiling
- ZEREX DEX-COOL antifreeze coolant is storage stable for up to five years as both a concentrate or diluted with water
- Protects vital engine parts for up to 5 years/150,000 miles with Extended Life Formula.
- Includes the Prestone protection package that meets environment and scale protection standards for the cooling system.
- Concentrate formula. Must mix with water (distilled ideal) to the desired mix ratio of EG & water. Can be used for top-off, complete drain and refill or flush and refill of the cooling system.
- All GM vehicles 1995 and newer/GM approved (GMC, Chevrolet, Buick, Cadillac, Pontiac, Saturn, Oldsmobile, Hummer), most Ford vehicles 2011- 2018 (Ford, Lincoln, Mercury) and most Chrysler vehicles 2013 and newer (Ram, Dodge, Jeep, Chrys)
- Contains bitterant
- High-performance, universal automotive antifreeze/coolant with extended life
- Provides effective, long-term corrosion protection for aluminum, brass, cast iron, steel, solder, and copper
- Superior high temperature for aluminum protection, resulting in longer component life
- Silicate-free formula maintains good as new heat transfer, and reduces silicate gel formation in use or in storage
- Suitable for a 5-year or 150,000 mile service life in automotive applications; up to of 600,000 miles or 12,000 hours in heavy duty applications
- ZEREX DEX-COOL antifreeze coolant is approved to the GM 6277M specification
- ZEREX DEX-COOL antifreeze coolant contains no phosphates, silicates, borates, nitrates, amines and nitrites
- Valvoline ZEREX DEX-COOL antifreeze coolant is a patented* carboxylate formulation with a service life of up to five years or 150,000 miles
- When diluted 50% with water, ZEREX DEX-COOL protects modern engine components from winter freezing and summer boiling
- For any product use or product technical questions call 1-800-TEAM-VAL
- PREDILUTED ANTIFREEZE AND COOLANT: Engineered to support any vehicle's engine cooling system to enhance performance and provide protection. This item contains a bittering agent called Denatonium Benzoate.
- PROPRIETARY BLEND: Contains 10X the scale-fighting inhibitors to ensure maximum cooling performance while protecting against scale, corrosion, and other damage
- SUPERIOR CHEMISTRY: Free from 2-EHA, silicate, nitrite, borate, and amines to keep your vehicle functioning in prime condition
- UNIVERSAL FORMULA: Compatible with any color or type of existing antifreeze and coolant in your car's system
- LONG-LASTING: Offers 2X the average warranty coverage, cooling your engine system for over 10 years or 300,000 miles of service
Last update on 2025-05-08 / Affiliate links / Images from Amazon Product Advertising API
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SEOCONTENT-START
Bulletin No.: PIC5984B
Date: Mar-2016
| Subject: | Hiss Noise Or Gurgle Noise From Dash – Reduced Heater Performance |
| Models: | 2010 – 2015 Chevrolet Camaro |
This PI was superseded to update the Condition section. Please discard PIC5984A.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Some customers may comment that a noise can be heard from the dash area while the engine is running. It may be a hiss noise or a gurgle noise that can be heard. Raising the engine RPM may or may not change the sound of this noise. Some customers may also comment that the heater has reduced performance. This is usually noticed while the vehicle is idling.
Recommendation/Instructions
This noise may be coming from the cooling system in the vehicle. If a noise can be verified and it sounds like it may be coming from the heater core, dealership technicians are to remove the inlet hose of the vehicle’s heater core. There will be an inlet screen installed in the core that may be plugged with debris, causing this noise. Using a pocket screwdriver or a small pick, remove the screen and inspect it to see if it is plugged with debris. If this screen is found to be plugged, it will need to be cleaned or replaced. In addition to this, the vehicle’s cooling system will need to be flushed out and refilled. If a lot of debris is found in the inlet screen, backflush the heater core as well. Regardless of the repair direction, the air will need to be bled from the cooling system, and technicians are to evaluate the customer’s concern again at that point.
Note: Do not replace the heater core for a noise issue. This is a very extensive procedure which requires the removal of the windshield. If a heater core is suspected for a noise concern and the filter is free of debris, backflush the heater core and inspect to see if any additional debris was trapped in the heater core. Bleed the cooling system and evaluate the customer’s concern.
Warranty Information
For vehicles repaired under warranty use:
| Labor Code | Description | Labor Time |
| 4415160 | Heater Core Inlet and Outlet Pipe Filter Replacement | Use Published Labor Operation Time |
| 4033392 | Coolant System Flushing | Use Published Labor Operation Time |
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
SEOCONTENT-END
I have this exact issue. It’s a hissing noise from the passenger side. Sounds like it is coming from under the dash board. Dealership is claiming this is NORMAL! I am at my wits end. How can I get this fixed. My camaro only has 27k miles! I cannot imagine that they designed a car to sound like this! Please help!