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NHTSA ID Number: 10096241
Manufacturer Communication Number: PIT5496
Summary
THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON THE STEPS NEED TO DIAGNOSE AND REPAIR VEHICLES THAT MAY HAVE RATTLE OR BUZZ NOISE FROM THE REAR OF THE VEHICLE. TECHNICIAN WILL NEED TO REMOVE RIGHT REAR INNER FENDER WELL AND INSPECT THE REAR AUXILIARY HEATER / EVAPORATOR LINES FOR CONTACTING EACH OTHER. IF THE LINES ARE FOUND TO BE CONTACTING EACH OTHER, LOOSEN THE RETAINING CLAMPS AND REPOSITION LINES TO GAIN CLEARANCE, AND THEN RETIGHTEN RETAINING CLAMPS.
12 Affected Products
Vehicles
CADILLAC![]() | ESCALADE | 2015-2016 |
CADILLAC![]() | ESCALADE ESV | 2015-2016 |
CHEVROLET | SUBURBAN | 2015-2016 |
CHEVROLET | TAHOE | 2015-2016 |
GMC | YUKON | 2015-2016 |
GMC | YUKON XL | 2015-2016 |
SEOCONTENT-START
Bulletin No.: PIT5496
Date: Feb-2016
Subject: | Buzz / Rattle Noise From Right Rear Of Vehicle |
Models: | 2015 – 2016 Cadillac![]() |
2015 – 2016 Chevrolet Tahoe and Suburban | |
2015 – 2016 GMC Yukon Models |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Some customers may comment that they hear a rattle or buzz noise from the rear of the vehicle. It may be most noticeable when driving 35 to 40 MPH or while in gear at a stop.
Recommendation/Instructions
Road test vehicle to get it up to operating temperature so concern can be duplicated. Remove right rear inner fender well and inspect the rear auxiliary heater / evaporator lines for contacting each other.




If the lines are found to be contacting each other, loosen the retaining clamps and reposition lines to gain clearance, then retighten retaining clamps.
Warranty Information
For vehicles repaired under warranty use:
Labor Operation | Description | Labor Time |
4480418* | Reposition Aux Evaporator or Heater Core Pipes | 1.0 hr |
* This is a unique labor operation for bulletin use only. |
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
Bulletin No.: PIT5496
Date: Feb-2016
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- Approved for use in California
- High Mileage refrigerant for vehicles over 75, 000 miles
- Contains approximately 10 oz. of R-134a and 2 oz. of additives
- Contains leak sealer to seal common A/C leaks in rubber hoses, gaskets, and O-rings
- Contains high mileage No wear additives
- Universal - ZeroR AC Refrigerant is a hydrocarbon that safely bonds with chemicals like R134a, R1234YF and R12. We can only advertise this product to be used in R134a systems due to EPA regulations in the USA on both R12 and R1234YF systems. EPA also prohibits mixing refrigerant types. See the description for all legal disclaimers.
- Easy - This product installs just as easily as any R134a products. Cans even have R134a threads and the majority of R134a can taps will work for these cans.
- 6oz Cans - Refrigerants are compressed gasses and are measured by weight, not by liquid volume such as water. All gasses compress differently and produce a different weight. ZeroR AC Refrigerant is low weight compared to R134a, but its performance is equal to 16oz of R134a.
- Eco Friendly – ZeroR AC Refrigerant is a 100% Natural gas unlike R134a, R1234yf and R12.
- Safe – ZeroR AC Refrigerant has a class 2.1 flammability rating just like the new R1234YF which is now used in 100% of newly manufactured vehicles. Under normal operating conditions this product presents no danger to its users when handled properly and used in systems approved for flammable refrigerants.
- This item cannot be shipped to Washington or California
- Contains approximately 1.5oz of refrigerant and 1.5oz of additives
- Repairs Metal Leaks in evaporators, condensers, compressors, accumulators and receiver dryers
- Seals Rubber Leaks in O-rings, gaskets, and hoses
- With red dye for detecting leaks too large to repair
- Reusable dispensing hose designed for compliance and to work only with R-134a cans with self-sealing valve can tops
- Digital gauge with guided command
- Guided Commands eliminate the guesswork
- 24” Long Hose
- Trigger Dispenser
- Quick Connect Coupler
- Replaces lost R-134a refrigerant and oil in automotive A/C system
- Formulated with COOL BOOST technology to provide up to 18% colder air and eliminate moisture buildup
- System-safe leak sealer additive seals common A/C leaks in rubber hoses, gaskets and O-rings
- Contains R-134a gas which is acceptable for use in motor vehicle A/C (MVAC) systems
- Complies with Section 612 of the EPA Clean Air Act, EPA Compliant in Self Sealing Cans
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