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NHTSA ID Number: 10205057
Manufacturer Communication Number: 20NA110
Summary
This service bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump.
61 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| CADILLAC | ESCALADE | 2021 |
| CADILLAC | ESCALADE ESV | 2021 |
| CHEVROLET | 4500HD | 2021 |
| CHEVROLET | 5500HD | 2021 |
| CHEVROLET | COLORADO | 2016-2021 |
| CHEVROLET | CRUZE | 2017-2019 |
| CHEVROLET | EQUINOX | 2018-2019 |
| CHEVROLET | EXPRESS | 2017-2021 |
| CHEVROLET | SILVERADO 1500 | 2017-2021 |
| CHEVROLET | SILVERADO 2500 | 2017-2021 |
| CHEVROLET | SILVERADO 4500HD | 2019-2021 |
| CHEVROLET | TAHOE | 2021 |
| GMC | CANYON | 2016-2021 |
| GMC | SAVANA | 2017-2021 |
| GMC | SIERRA 1500 | 2020-2021 |
| GMC | SIERRA 2500 | 2017-2021 |
| GMC | SIERRA DENALI | 2017-2019 |
| GMC | TERRAIN | 2017-2020 |
| GMC | YUKON | 2021 |
| GMC | YUKON XL | 2021 |
Condition
Some technicians may comment that after replacing the DEF pump, the pump will not build pressure and one or more of the following DTCs may set:
- P20E8: Reductant Low Pressure
- P249C: Excessive Time To Enter Closed Loop Reductant Injection Control
Information
If after replacing the DEF pump, the system is unable to build pressure, inspect for any leaks, loose connections or kinks in the supply line.
After performing an initial leak test three times, if low pressure is present, this may be because the DEF pump filter has dried out.
Allow the vehicle to sit overnight with the new pump and DEF fluid to re-saturate the DEF pump filter. In the morning, perform the leak test three additional times. The pump should now be able to build pressure.
Parts Information
No parts are required for this repair.
SEOCONTENT-START
Service Bulletin Bulletin No.: 20-NA-110
Date: August, 2021
INFORMATION
Subject: Information on Diesel Exhaust Fluid (DEF) Pump Unable to Build Pressure After
Replacement
Attention: Only perform this procedure after replacing the DEF pump and the system does not
build pressure (does not prime).
Brand: Model:
Model Year: VIN: Engine:
(Diesel)
Transmission:
from to from to
Cadillac Escalade Models 2021 2022
— —
LM2
—
Chevrolet
Colorado 2016 2021 LWN
Cruze 2017 2020 LH7
Express 2017 2021 LWN
Equinox 2018 2019 LH7
Silverado 2017 2018 L5P
Silverado 1500 (New
Model-12th VIN=7) 2019 2019 LM2
Silverado 1500 2020 2021 LM2
Silverado 2500/3500 2019 2021 L5P
Silverado 4500HD/
5500HD/6500HD 2019 2021 L5D
Silverado LD 2019 2019 LM2
Tahoe 2021 2022 LM2
GMC
Canyon 2016 2021 LWN
Savana 2017 2021 LWN
Sierra 2017 2018 L5P
Sierra 1500 2020 2021 LM2
Sierra 2500/3500 2019 2021 L5P
Sierra Limited 2019 2019 LM2
Terrain 2018 2019 LH7
Yukon Models 2021 2022 LM2
Involved Region or Country
North America, Middle East, Israel, Palestine, Argentina, Brazil, Chile, Colombia,
Ecuador, Paraguay, Peru, Uruguay, China, Thailand, Egypt, Other Africa, Australia/New
Zealand
Condition
Some technicians may comment that after replacing the DEF pump, the pump will not
build pressure and one or more of the following DTCs may set:
• P20E8: Reductant Low Pressure
• P249C: Excessive Time To Enter Closed Loop Reductant Injection Control
Page 2 August, 2021 Bulletin No.: 20-NA-110
Information
If after replacing the DEF pump, the system is unable to build pressure, inspect for any
leaks, loose connections or kinks in the supply line.
After performing an initial leak test three times, if low pressure is present, this may be
because the DEF pump filter has dried out.
Allow the vehicle to sit overnight with the new pump and DEF fluid to re-saturate the DEF
pump filter. In the morning, perform the leak test three additional times. The pump should
now be able to build pressure.
Parts Information
No parts are required for this repair.
Warranty Information
Important: This Labor Operation should not be used
for initial diagnosing of low system pressure. This Labor
Operation should only be used if after the emission
reductant fluid tank (4025130 Emission Reduction Fluid
Tank Replacement) or the emission reductant fluid
pump (4029820 Emission Reduction Fluid Supply
Pump Module Replacement) has been replaced and
the system will not build pressure.
Important: Only apply the additional labor time if the
vehicle requires overnight soak time and re-test.
For vehicles repaired under the Emission coverage
(Coverage Code E), use the following labor operation.
Reference the Applicable Warranties section of
Investigate Vehicle History (IVH) for coverage
information.
Labor
Operation
Description Labor Time
4087458* Perform DEF Pump
Pressure Test
0.4 hr
*This is a unique Labor Operation for bulletin use only.
Version 4
Modified
Released June 11, 2020
October 13, 2020 – Added the Attention statement, 2016 Model Year to Colorado and
Canyon, updated the Involved Region or Country section, added first Important statement
under Warranty Information and updated the warranty coverage statement.
January 11, 2021 – Added the 2021 Model Year and removed Korea.
August 20, 2021 – Added the 2021-2022 Cadillac Escalade, Chevrolet Tahoe and GMC
Yukon models and Australia/New Zealand to the Involved Region or Country section.
SEOCONTENT-END
1 Associated Document
Manufacturer Communications
Bulletin No.: 20-NA-110
Date: August, 2021
https://www.nhtsa.gov/recalls?nhtsaId=10205057
MC-10205057-9999.pdf 516.631KB
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NHTSA ID Number: 10187757
Manufacturer Communication Number: 20NA110
Summary
This informational bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump.
1 Associated Document
Manufacturer Communications
Bulletin No.: 20-NA-110
Date: January, 2021
https://www.nhtsa.gov/recalls?nhtsaId=10187757
MC-10187757-9999.pdf 512.948KB
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NHTSA ID Number: 10183168
Manufacturer Communication Number: 20NA110
Summary
This informational bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump.
1 Associated Document
Manufacturer Communications
Bulletin No.: 20-NA-110
Date: October, 2020
https://www.nhtsa.gov/recalls?nhtsaId=10183168
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NHTSA ID Number: 10178270
Manufacturer Communication Number: 20NA110
Summary
This informational bulletin advises the technician on what to do if the DEF pump has been replaced and perform a leak test to prime the pump.
1 Associated Document
Manufacturer Communications
Bulletin No.: 20-NA-110
Date: June, 2020
https://www.nhtsa.gov/recalls?nhtsaId=10178270
MC-10178270-9999.pdf 509.803KB
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| “This site contains affiliate links for which OEMDTC may be compensated” |
- Prime Guard DEF is a safe, environmentally friendly solution for Selective Catalytic Reduction
- Diesel Exhaust Fluid is sprayed into the diesel exhaust streams of diesel engines to lower the concentration of nitrogen oxide, NOx, in emissions
- Engineered for use in Selective Catalytic Reduction (SCR) systems on diesel engines, BlueDEF diesel exhaust fluid is comprised of a high-purity synthetic urea and deionized water mixture that improves emissions and fuel economy
- When injected into the exhaust stream with a specialized dosing module, BlueDEF's water vaporzies, leaving ammonia molecules en route to the catalytic converter; once there, it converts NOx molecules into harmless nitrogen and water vapor - making for cleaner emissions
- To ensure Selective Catalytic Reduction (SCR) performance, diesel exhaust fluids must adhere to the ISO 22241 standards
- Diesel Exhaust Fluid (DEF) is made with 32.5% urea, (NH2)2CO, and 67.5% deionized water. Diesel Exhaust Fluid (DEF) is non-toxic and safe to handle, but it can corrode some metals, so it must be stored and transported carefully
- Blue Def DEF002-2PK Diesel Exhaust Fluid, 2.5 Gallon, 2 Pack
- Mixture of 32.5 percent high purity synthetic urea and 67.5 percent deionized water
- Helps convert nitrogen oxide into harmless nitrogen gas and water vapor for cleaner emissions
- Improves fuel economy by up to 5 percent
- Inject the fluid into your exhaust stream with a specialized dosing module
- Stable, colorless, odorless, and meets ISO standards 22241 for purity and composition
- Meets GM Original Equipment specifications to be approved for use in GM vehicles as well as in non-GM diesel vehicles that have an SCR (Selective Catalytic Reduction) system to meet regulated NOx emissions (Based on EPA certification testing. Your actual emissions will vary based on several factors including temperature, terrain, and driving conditions).
- High quality formula is made from high purity urea and deionized water.
- Meets API regulations and ISO 22241 standard for purity and concentration
- Nozzles sold separately
- Ensures that your diesel engine operates at its best fuel efficiency by reducing NOx emissions. Helps to maintain optimum fuel economy and reduces fuel consumption
- By reducing NOx emissions, this fluid helps to protect the Selective Catalytic Reduction (SCR) system from damage, which can lead to costly repairs
- Helps to sustain the life of your SCR system by reducing deposits and buildup that can lead to clogging or malfunctioning of the system
- Compatible with all diesel SCR systems, a versatile choice for a wide range of diesel engine users. Used in heavy-duty trucks, buses, and other diesel-powered vehicles
- Meets or exceed the strictest OEM standards for quality and performance. Conforms to the ISO-22241-1 specification for DEF. An American Petroleum Institute (API) certified diesel exhaust fluid
- 40 - 2.5 Gallon Boxes of DEF
- Dispensing nozzle for easy pouring
- Meets or exceeds all EPA standards
- Meets the stringent AUS 32, DIN 70070, ISO 22241 purity and concentration standards
- Product can be used without removing from the box
- 40 Individual 2.5 Gallon Jugs of BlueDEF Diesel Exhaust Fluid (100 Gallons)
- One gallon of BlueDEF is used approximately every 300 miles
- Vented nozzle helps reduce fluid glugging and improves flow rate
- A truck with a 20 gallon DEF tank can go up to 6000 miles between fill-ups
- Approved for use in all diesel SCR systems
Last update on 2024-06-03 / Affiliate links / Images from Amazon Product Advertising API
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