This photo shows the same type of part you'll receive. Since each used part has its own wear and scratches, yours may look slightly different. Check the product notes for details about the condition of this specific part.
OEM Catalytic Converter for 2017-2023 Chevrolet & GMC - Front
Only 1 left in stock
Price today
$529.95
− $330 core refund
YOUR NET COST
$199.95
after returning your old part
✓ Prepaid core return label
30-DayReturns
1-yearWarranty
100%Money-Back
Condition: Excellent (A) — like new, minimal to no wear
Professionally inspected and tested.
Product Notes Read before buying
This is a used part. This catalytic converter is a recertified OEM part for vehicles with the 6.6L engine.
This catalytic converter is for vehicles with the 6.6L DIESEL engine only. It will not fit the 6.6L GAS engine, which requires a different part.
This catalytic converter is for vehicles with the 6.6L DIESEL engine only. It will not fit the 6.6L GAS engine, which requires a different part.
✓ EPA RE-CERTIFIED CATALYTIC CONVERTER
What is a recertified catalytic converter? A converter that has been performance tested and passes EPA guidelines for certified converters. Each unit includes a permanent tag with its part number, recertification facility, and date of recertification.
- 1-Year Warranty (parts only, no labor)
- OEM bolt-on design (not weld-in)
- Donor vehicle VIN available on request
- Return your old cat to receive $330 refund
Why Buy Used OEM Parts?
Checked & Tested
We check and test every used part before we sell it. It may show some wear, but it works and is ready to install.
Original Equipment
This is the same part your vehicle came with from the factory. It fits and works just like the original — because it is one.
Works Like New
A few marks on the outside don't change what's inside. The part works the way it should.
Big Savings
Pay 50–80% less than buying new. Same factory part, much lower price.
Not sure? Ask Wrenchy — Your Parts Assistant.
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
Chevrolet
2 models(tapclick to hide)
Silverado 2500 HD
2017-2023
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| High Country | Crew Cab Pickup | 2017 - 2019 | V8 6.6L DIESEL Turbo | RWD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| High Country | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | 4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| LT | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| LT | Extended Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| LT | Standard Cab Pickup | 2017 - 2018, 2020 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| LTZ | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| LTZ | Extended Cab Pickup | 2017 - 2018, 2020 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| WT | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| WT | Extended Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| WT | Standard Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Custom | Crew Cab Pickup | 2021 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Custom | Extended Cab Pickup | 2021 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| 2022 |
Silverado 3500 HD
2017-2023
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| High Country | Crew Cab Pickup | 2017 - 2019 | V8 6.6L DIESEL Turbo | RWD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| High Country | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | 4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| LT | Cab & Chassis | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| LT | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| LT | Extended Cab Pickup | 2017 - 2018, 2020 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| LT | Standard Cab Pickup | 2017 - 2018, 2020 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| LTZ | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| LTZ | Extended Cab Pickup | 2017 - 2018 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| WT | Cab & Chassis | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| WT | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| WT | Extended Cab Pickup | 2017 - 2018, 2020 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| WT | Standard Cab Pickup | 2017 - 2018, 2020 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| 2022 |
GMC
2 models(tapclick to hide)
Sierra 2500 HD
2017-2023
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Crew Cab Pickup | 2017 - 2021 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Base | Extended Cab Pickup | 2017 - 2021 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Base | Standard Cab Pickup | 2017 - 2021 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Denali | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | 4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Denali | Crew Cab Pickup | 2017 - 2019 | V8 6.6L DIESEL Turbo | RWD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| SLE | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| SLE | Extended Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| SLE | Standard Cab Pickup | 2017 - 2018, 2020 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| SLT | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| SLT | Extended Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| AT4 | Crew Cab Pickup | 2020 - 2023 | V8 6.6L DIESEL Turbo | 4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Pro | Crew Cab Pickup | 2022 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Pro | Extended Cab Pickup | 2022 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Pro | Standard Cab Pickup | 2022 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
Sierra 3500 HD
2017-2023
(tapclick to hide)
Swipe left/right to see more info
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Cab & Chassis | 2017 - 2021 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Base | Crew Cab Pickup | 2017 - 2021 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Base | Extended Cab Pickup | 2017 - 2018, 2020 - 2021 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Base | Standard Cab Pickup | 2017 - 2018, 2020 - 2021 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Denali | Crew Cab Pickup | 2017 - 2019 | V8 6.6L DIESEL Turbo | RWD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Denali | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | 4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| SLE | Cab & Chassis | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| SLE | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| SLE | Extended Cab Pickup | 2017 - 2018, 2020 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| SLE | Standard Cab Pickup | 2017 - 2018, 2020 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| SLT | Crew Cab Pickup | 2017 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| SLT | Extended Cab Pickup | 2017 - 2018 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Denali | Cab & Chassis | 2019 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| AT4 | Crew Cab Pickup | 2020 - 2023 | V8 6.6L DIESEL Turbo | 4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Pro | Cab & Chassis | 2022 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Pro | Crew Cab Pickup | 2022 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Pro | Extended Cab Pickup | 2022 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
| Pro | Standard Cab Pickup | 2022 - 2023 | V8 6.6L DIESEL Turbo | RWD/4WD | Automatic | engine_size: include 6.6L; fuel_type: include DIESEL; part_location: include Front |
Verify before ordering — please confirm your vehicle's year, make, model and sub-model specifications before placing your order. If anything is unclear, our customer service team is available to help.
Policies, in plain English.
Shipping & Handling
- Standard shipping: 3-7 business days via UPS Ground
- Parts are carefully packaged to prevent damage during transit
1-Year Warranty
This EPA re-certified catalytic converter includes a 1-year warranty (parts only, no labor) from the date of purchase.
- If your converter fails within 1 year, we will send a replacement
- Warranty covers parts only — labor is not included
- Warranty covers defects — not installation errors, misuse, or damage after installation
Note: Warranty is for replacement only. Return window for refunds is 30 days.
Returns (30 Days)
We accept returns within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Electronic parts: Must be returned with the sealed inspection bag unopened. The clear bag allows full visual inspection before opening. Once opened, electronic parts can only be exchanged for a replacement if defective — no refunds
- Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
- Return shipping: We cover return shipping as part of our 100% money-back guarantee
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
Damaged in Shipping?
If your part arrives damaged:
- Stop immediately — do not install the part
- Keep all original packaging and boxes
- Take clear photos of the damage and packaging
- Contact us within 48 hours of delivery
We will handle the carrier claim. You are not responsible for shipping damage — we just need your help documenting it.
Order Cancellation
Orders can be cancelled before shipment for a full refund. Once shipped, cancellations follow our return policy.
Expert Guides
Related Trouble Codes (OBD-II)
6 matching guidesIf your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.
P0420
Catalyst Efficiency Causes and Fixes
2014-2017 Gmc SIERRA
P0420
Causes, Fixes, and TSBs
2014-2017 Chevrolet SILVERADO
P0421
Warm-Up Catalyst Causes & Fixes
2020-2020 Chevrolet SILVERADO 3500
P0422
Catalyst Efficiency Causes & Fixes
2020-2024 Gmc SIERRA 2500
P0430
Catalyst Efficiency Causes and Fixes
2014-2017 Gmc SIERRA
P0430
Catalytic Converter and Other Causes
2014-2017 Chevrolet SILVERADO
↑ A single part can trigger multiple related trouble codes. Each guide is vehicle- and code-specific.
Miscellaneous Information
OEM Part Numbers:
GM: 12672521, 12677200, 12680277, 12705096, 12729651, 19420224
Fits Years: 2017 2018 2019 2020 2021 2022 2023
Why Millions Choose Go-Parts
Your Go-To Place
for auto parts.
In operation since 2007. Trusted by over a million DIYers, mechanics, and body shops across all 50 states.
100%
Money-Back Guarantee
Shop With Total Confidence
Not happy with what arrived? 30-day returns, no-questions-asked refund. We make it right.
19
Years of Excellence
Trusted Since 2007
Nearly two decades of shipping parts to professionals & enthusiasts.
1YR
Warranty
Backed For The Long Haul
Full 1-year warranty on every re-certified catalytic converter. If it fails, we replace or refund — no hassle.
What buyers are saying.
★★★★★
4.9
1,451 verified reviews
Racing Partner Videos
