Dorman 977-378 Electronic Throttle Body 17-19 Chevy Silverado GMC Sierra
Confirm Fitment Before You Buy
Not sure it fits? Message Year/Make/Model/Engine (2WD/4WD if applicable) and we’ll help confirm compatibility.
Why buy from Koskowski Automotive?
• 50+ years (since 1972) • Dorman Authorized Seller • Fast shipping • Easy returns
Regular price
$169.16
Select your vehicle at the top of the page to check fitment.
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Vehicle Fitment: Use the table below to match your exact configuration. If you don’t see your exact setup, message us before ordering.
Original equipment throttle bodies often fail when moisture and oil intrusion foul the internal electronics. This Dorman OE FIX throttle body features Dorman Sensor Shield technology, a proprietary butterfly shaft seal to prevent future failures from this contamination.
- Upgraded replacement - this electronic throttle body features enhanced internal components to prevent future failures
- New construction - 100% new case aluminum, not remanufactured, for reliability and the convenience of no core charge
- Simple replacement - installation is the same as original equipment with plug-and-play electrical connector
- Quality engineering - designed in the United States and backed by decades of automotive aftermarket experience
Vehicle Fitment
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2019 | Chevrolet | Corvette | 6.2L V8 | |
| 2017-2019 | Chevrolet | Silverado 2500 HD | 6.6L V8 | |
| 2019 | Chevrolet | Silverado 3500 HD | ||
| 2017-2018 | Chevrolet | Silverado 3500 HD | 6.6L V8 | |
| 2019 | GMC | Sierra 2500 HD | ||
| 2017-2018 | GMC | Sierra 2500 HD | 6.6L V8 | |
| 2019 | GMC | Sierra 3500 HD | ||
| 2017-2018 | GMC | Sierra 3500 HD | 6.6L V8 |
Please confirm the part number and your vehicle's year, make, model and engine before ordering. Questions? Message us with your VIN and we'll check fitment for you.
Specifications
| Brand | Dorman |
|---|---|
| Part Number | 977-378 |
| UPC | 019495281115 |
| Mounting Hardware Included | No |
| Adjustable | No |
| Gasket Or Seal Included | Yes |
| Inlet Diameter | 72 mm |
| Inlet Type | Flanged |
| Outlet Type | Non-Flanged |
| Outlet Quantity | 1 |
| Outlet Diameter | 72 mm |
| Fuel System Type | Diesel |
| Bore Diameter | 72 mm |
| Fuel Injectors Included | No |
| Idle Air Control Motor Included | Yes |
| Throttle Body Finish | Natural |
| Throttle Body Material | Aluminum |
| Throttle Body Spacer Included | No |
| Throttle Body Type | Mechanical |
| Throttle Position Sensor Included | Yes |
| Venturi Quantity | 0 |
| Grade Type | Standard Replacement |
| Connector/Terminal Type | Blade |
| Electrical Connection Type | Male |
| FMVSS (Federal Motor Vehicle Safety Standards) Compliant | Yes |
| Housing Color | Natural |
| Housing Material | Aluminum/PBT |
| Inlet Quantity | 1 |
| Installation Hardware Included | No |
| Package Contents | 1 Electronic Throttle Body; 1 Gasket |
| Terminal Count | 6 |
| Throttle Body Mounted | No |
| Country of Origin | China |
| Warranty | Limited Lifetime |
OE & Interchange Numbers
| 12665248 | General Motors (OE) |
|---|---|
| 12673449 | GM Genuine Parts (OE) |
| APTHB286 | Interchange |
| S20503 | Interchange |
| 12673449 | Interchange |
| 67-3054 | Interchange |
| 6E-3054 | Interchange |
| NTB1271 | Interchange |
| RTB1271 | Interchange |