No product in this list is confirmed as an EGR bypass valve for the 2011–2016 6.6L Duramax LML. The closest EGR-related choices are an LMM EGR kit and a 6.7L coolant throttle tube, but their listed fitments do not establish LML compatibility. The other products are transmission or charge-air bypass parts, not EGR valves. Use this comparison to identify what each item is actually intended for, and confirm the exact engine and model year before buying.
| Product | Listed application | Best suited for |
|---|---|---|
| EGR 6.6L Duramax LMM kit | 2007–2010 LMM | LMM owners seeking an EGR-related kit |
| EGR coolant throttle tube | 2013–2019 6.7L trucks | Owners matching the listed 6.7L fitment |
| ATS transmission bypass upgrade | 2013-current 6.7L Cummins, 2019+ | Transmission cooling upgrades |
| ATS 68RFE / AS69RC upgrade | 68RFE / AS69RC transmissions | Owners addressing transmission bypass |
| GM charge air bypass solenoid | GM application; verify vehicle fitment | Replacement charge-air solenoid buyers |
EGR 6.6L Duramax LMM Kit
This is the closest match in the list to a Duramax EGR-related part. Its stated fitment is specifically the 2007–2010 6.6L Duramax LMM in Silverado and Sierra 2500/3500 trucks. The feature description mentions CNC-machined billet block-off plates with O-rings for a sealed installation.
Best for: Owners of a listed LMM vehicle researching an EGR-related kit. Why it was selected: It is the only supplied product that specifically names a Duramax engine and an EGR system. Limitation: LMM fitment does not confirm compatibility with the LML engine. It is not listed as an LML bypass valve, so do not choose it for an LML without manufacturer or seller confirmation. EGR modifications may also be subject to emissions rules; check applicable federal and state requirements.
6.7L EGR Coolant Throttle Tube
The listing describes a coolant throttle tube for 2013–2019 6.7L 2500, 3500, and 4500 trucks. It says the design is a direct bolt-on and includes block-off plates with O-rings, an adapter, collar, hoses, clamps, and bolts. The advertised purpose is to reduce restrictions and back pressure.
Best for: Buyers whose truck matches the stated 6.7L fitment and who are looking for this type of coolant-tube assembly. Why it was selected: It is EGR-related and includes bypass-style hardware. Limitation: The listing does not establish fitment for a 6.6L Duramax LML. Its performance claims are product-description claims, not a confirmation of results on an LML. Verify engine and emissions compatibility before purchase.
ATS Thermal Bypass Upgrade for 6.7L Cummins
This ATS upgrade is for transmission cooling, not engine exhaust-gas recirculation. The description says it routes transmission cooler flow through the cooler and uses a billet aluminum filter coupler and clamp plate. It is listed for 2013-current 6.7L Cummins applications, including 2019 and newer models.
Best for: A Cummins owner researching a transmission thermal-bypass upgrade. Why it was selected: “Bypass valve” appears in the product type, making it important to distinguish from an EGR component. Limitation: It is not an LML Duramax part and does not bypass an EGR system.
ATS 68RFE / AS69RC Thermal Bypass Upgrade
The stated purpose of this ATS product is to eliminate a factory transmission bypass valve and help keep transmission temperatures in check. Its name identifies 68RFE and AS69RC transmission applications.
Best for: Buyers specifically addressing a compatible transmission’s thermal bypass. Why it was selected: It illustrates that “thermal bypass valve” and “EGR bypass valve” refer to different systems. Limitation: The supplied information does not identify an LML engine application. It is not an EGR valve or an LML-specific part.
GM Charge Air Bypass Valve Solenoid
GM Genuine Parts describes this solenoid as helping regulate air pressure entering the engine. The listing says GM parts are designed, engineered, and tested to GM standards. This is a charge-air component, not an EGR bypass valve.
Best for: A buyer diagnosing a charge-air bypass solenoid on a vehicle confirmed to match the part. Why it was selected: Its name can be confused with an EGR bypass part, so system identification matters. Limitation: The supplied description does not provide specific vehicle fitment. Confirm the part number against the vehicle before ordering; do not assume it fits an LML.
Buying Guide: How to Choose an LML EGR Part
Does the listing specifically name the LML engine?
Check the engine code and model-year range, not just “Duramax” or “6.6L.” LMM and LML are different applications. A listing for an LMM does not establish that the component fits an LML. Look for explicit LML fitment and confirm it with the vehicle identification number or a qualified parts source.
Is it actually an EGR component?
Identify the system named in the product description. EGR parts address exhaust-gas recirculation; transmission thermal bypass parts manage transmission-fluid flow; charge-air solenoids regulate air pressure. Similar use of the word “bypass” does not make these components interchangeable.
What should buyers verify before ordering?
- Confirm the truck’s model year, engine, and exact part application.
- Check whether the listing describes a complete assembly, valve, solenoid, or block-off kit.
- Review included seals and hardware, and confirm installation requirements with the seller or manufacturer.
- Check applicable emissions regulations before considering any EGR modification.
Frequently Asked Questions
Is any product here confirmed to fit an LML Duramax?
No. The supplied descriptions do not confirm LML fitment for any product.
Will the listed LMM EGR kit fit an LML?
That is not established by the listing. It specifies 2007–2010 LMM trucks, so verify compatibility before considering it for an LML.
Is a transmission thermal bypass valve an EGR bypass valve?
No. A transmission thermal bypass valve manages transmission cooling flow, while an EGR component relates to exhaust-gas recirculation.
What is the safest way to find the correct LML part?
Use the truck’s model year and VIN to verify an explicitly LML-compatible part with a reputable parts supplier or the vehicle manufacturer.