NHTSA ID Number: 10183779
Manufacturer Communication Number: 050604022R
TSB/Document Date: 2020-12-07
Summary
This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are recommended for use in all GM vehicles and the TOP TIER FUELS website URL.
Service Bulletin
Bulletin No.:
Date:
05-06-04-022R
October, 2020
INFORMATION
Subject:
TOP TIER™ Detergent Gasoline and TOP TIER™ Diesel Fuel Information and Licensed
Brands
Models:
2021 and Prior GM Passenger Cars and Trucks (includes Medium Duty)
United States, Canada, Argentina, El Salvador, Guatemala, Honduras, Mexico, Panama
and Puerto Rico
This bulletin has been revised to add 2021 Model Year vehicles. Please discard Corporate
Bulletin Number 05-06-04-022Q.
TOP TIER™ Fuels – General Motors
Recommendation
3980710
3980709
Copyright 2020 General Motors LLC. All Rights Reserved.
Page 2
October, 2020
•
•
4915798
Note: This is a voluntary program for fuel
marketers and not all fuel marketers will offer TOP
TIER™ Detergent Gasoline or TOP TIER™ Diesel
Fuel. Not all stations of a licensed brand may be
selling TOP TIER™ Diesel Fuel. Registration is
based on certification data and marketers of all
sizes including some major brands, independents
and big box stores.
•
A class of fuel called TOP TIER™ Detergent
Gasoline is available from various fuel marketers
for all octane grades of gasoline sold at their
stations in the United States (including US
Territories), Canada, Puerto Rico and certain
Central American countries. This gasoline meets
the detergent standards developed by eight
automotive companies. All vehicle engines will
benefit from using TOP TIER™ Detergent
Gasoline over gasoline containing the “Lowest
Additive Concentration” (LAC). LAC is also known
as the minimum detergent treat rate,
recommended by the Environmental Protection
Agency (EPA) in the United States and in Canada,
the Canadian General Standards Board (CGSB).
Those vehicles that have experienced engine
deposit related concerns may especially benefit
from using TOP TIER™ Detergent Gasoline.
•
•
Bulletin No.: 05-06-04-022R
The TOP TIER™ program is not just about a high
detergency rate. It is a robust engine cleanliness
and performance specification validating the
specific chemistry within the detergent package.
TOP TIER™ Detergent Gasoline must conform to
the standards which specify that gasoline sold in
the selected nation or region shall not contain
metallic additives, including
methylcyclopentadienyl manganese tricarbonyl
(MMT). If a fuel marketer successfully completes
all of the engine and fuel injector testing required
in the TOP TIER™ specification, they can claim to
be TOP TIER™. All performance testing must be
conducted at an independent, ISO 17025
accredited laboratory.
A class of fuel called TOP TIER™ Diesel Fuel is
available from various fuel marketers. Since diesel
fuel retailers may also sell non-additized diesel
fuel or diesel fuel not meeting the TOP TIER™
requirements, always check the dispenser for
TOP TIER™ Diesel Fuel designation.
The EPA and CGSB require only a minimum
amount of detergent in gasoline. TOP TIER™
Detergent gasoline contains 2–3 times more
detergent than the EPA and CGSB minimum
requirement, resulting in a lower amount of intake
valve deposits (IVD). The IVD can negatively
affect fuel economy, emissions, and performance.
General Motors, FCA, BMW, Honda, Toyota,
Volkswagen, Audi and Mercedes-Benz developed
the TOP TIER™ Detergent Gasoline Standards
and support the use of TOP TIER™ Detergent
Gasoline by recommending it in their vehicle
Owner Manuals. All eight corporations recognize
the benefits to the engine, the environment, and
the consumer. Additionally, the companies
recognize that by joining together they can better
address the industry concern with low fuel
detergency levels and the intentional addition of
harmful organometallic additives. GM strongly
recommends the use of TOP TIER™ Detergent
Gasoline and TOP TIER™ Diesel Fuel.
A Cleaner Engine Has Performance and
Environmental Advantages
The following gasoline engine intake valve graphics
show the difference between an engine that did not use
TOP TIER™ Detergent Gasoline and an engine that did
use TOP TIER™ Detergent Gasoline at 16,093 km
(10,000 miles).
Bulletin No.: 05-06-04-022R
October, 2020
Page 3
3979074
Engine intake valve using Non-TOP TIER™
Detergent Gasoline having the minimum detergent
treat rate with more than 1,000 mg of deposits.
Deposits (1 and 2) on the intake valve reduce fuel
economy by creating a porous surface that collects wet
fuel, thereby affecting the air to fuel mixture in the
cylinder and releases fuel late in the combustion cycle
leading to increased unburnt hydrocarbon (HC) and
carbon monoxide (CO) emissions. Likewise fuel
injectors may become restricted with carbon deposits
over time resulting in an incorrect injector spray pattern
and similarly increasing HC and CO emissions.
3979169
Engine intake valve using TOP TIER™ Detergent
Gasoline having a high detergent treat rate with
less than 50 mg deposits.
This intake valve is significantly cleaner, resulting in
optimal fuel economy and engine driveability
performance as well as reduced emissions.
TOP TIER™ Licensed Brands
The latest list of TOP TIER™ Detergent Gasoline and
TOP TIER™ Diesel Fuel Brands that have met the TOP
TIER™ standards will appear on the Home page under
the Licensed Brands tab. Use the drop down menu to
select Gasoline or Diesel. Visit this website:
https://www.toptiergas.com/
• Additional gasoline retailers are added to the TOP
TIER™ Licensed Brands list when they meet the
TOP TIER™ Detergent Gasoline standards.
• Additional diesel fuel retailers are added to the
TOP TIER™ Licensed Brands list when they meet
the TOP TIER™ Diesel Fuel standards.
Trademark Footnotes
TOP TIER™ Detergent Gasoline and its Logo are
Trademarks of General Motors LLC
TOP TIER™ Diesel Fuel and its Logo are
Trademarks of General Motors LLC
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: 050604022R
Replacement Service Bulletin Number:
MFR Communication Date: 2020-10-21
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL SYSTEM, DIESEL
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission, ABS, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA
Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU coding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations - 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Programming): Allows for Ford, for Lincoln, and for Mazda ECU programming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- Cost-effective ECU Coding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
- 3 Years Software Update, Value for Money: With 3 years of software updates and 22+ languages(no IP restrictions), XTOOL D7S auto scanner code scanner ensures ongoing compatibility for the latest car models and improved diagnostic functions. This all system vehicle diagnostic scanner comes with a 30-day return policy and a 24-month repair for dependable performance. XTOOL are dedicated to your satisfaction, so enjoy seamless support and lifetime expert assistance. Should you encounter any issues or concerns, don’t hesitate to reach out XTOOL. D7S with newest update with 22 languages freely transfer without authorization, check details from setting-language or from XTOOL
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
This product presentation was made with AAWP plugin.