12678992 Genuine GM High Pressure Diesel Fuel Injector For Silverado Sierra 6.6L

12678992 Genuine GM High Pressure Diesel Fuel Injector For Silverado Sierra 6.6L

Name: 12678992 Genuine GM High Pressure Diesel Fuel Injector For Silverado Sierra 6.6L
Brand: GM
SKU: 12678992
Price: 399.00 USD
Availability: InStock

P/N: 12678992 Manufactured by: GM

$399.00 - $399.00

$399.00

$399.00 - $399.00

$399.00

3 in Stock

Condition: New

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Description

The 12678992 is a genuine GM high pressure diesel fuel injector intended for select 2017–2023 Chevrolet Silverado HD and GMC Sierra HD models equipped with the 6.6L V8 Duramax diesel engine. It delivers finely controlled fuel injection into the cylinders while operating within the pressures of the factory common rail system to support proper combustion and engine efficiency.

Vehicle Compatibility

Year	Vehicle	Engine	Trims
2023	Chevrolet Silverado 2500 HD	6.6L V8 Diesel	Custom, High Country, LT, LTZ, WT
2023	Chevrolet Silverado 3500 HD	6.6L V8 Diesel	High Country, LT, LTZ, WT
2023	GMC Sierra 2500 HD	6.6L V8 Diesel	AT4, Denali, Pro, SLE, SLT
2023	GMC Sierra 3500 HD	6.6L V8 Diesel	AT4, Denali, Pro, SLE, SLT
2022	Chevrolet Silverado 2500 HD	6.6L V8 Diesel	Custom, High Country, LT, LTZ, WT
2022	Chevrolet Silverado 3500 HD	6.6L V8 Diesel	High Country, LT, LTZ, WT
2022	GMC Sierra 2500 HD	6.6L V8 Diesel	AT4, Denali, Pro, SLE, SLT
2022	GMC Sierra 3500 HD	6.6L V8 Diesel	AT4, Denali, Pro, SLE, SLT
2021	Chevrolet Silverado 2500 HD	6.6L V8 Diesel	Custom, High Country, LT, LTZ, WT
2021	Chevrolet Silverado 3500 HD	6.6L V8 Diesel	High Country, LT, LTZ, WT
2021	GMC Sierra 2500 HD	6.6L V8 Diesel	AT4, Base, Denali, SLE, SLT
2021	GMC Sierra 3500 HD	6.6L V8 Diesel	AT4, Base, Denali, SLE, SLT
2020	Chevrolet Silverado 2500 HD	6.6L V8 Diesel	High Country, LT, LTZ, WT
2020	Chevrolet Silverado 3500 HD	6.6L V8 Diesel	High Country, LT, LTZ, WT
2020	GMC Sierra 2500 HD	6.6L V8 Diesel	AT4, Base, Denali, SLE, SLT
2020	GMC Sierra 3500 HD	6.6L V8 Diesel	AT4, Base, Denali, SLE, SLT
2019	Chevrolet Silverado 2500 HD	6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel	High Country, LT, LTZ, WT
2019	Chevrolet Silverado 3500 HD	6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel	High Country, LT, LTZ, WT
2019	GMC Sierra 2500 HD	6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel	Base, Denali, SLE, SLT
2019	GMC Sierra 3500 HD	6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel	Base, Denali, SLE, SLT
2018	Chevrolet Silverado 2500 HD	6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel	High Country, LT, LTZ, WT
2018	Chevrolet Silverado 3500 HD	6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel	High Country, LT, LTZ, WT
2018	GMC Sierra 2500 HD	6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel	Base, Denali, SLE, SLT
2018	GMC Sierra 3500 HD	6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel	Base, Denali, SLE, SLT
2017	Chevrolet Silverado 2500 HD	6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel	High Country, LT, LTZ, WT
2017	Chevrolet Silverado 3500 HD	6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel	High Country, LT, LTZ, WT
2017	GMC Sierra 2500 HD	6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel	Base, Denali, SLE, SLT
2017	GMC Sierra 3500 HD	6.0L V8 Flex, 6.0L V8 Gas, 6.6L V8 Diesel	Base, Denali, SLE, SLT

General Specifications

Condition	New
Part Number	12678992
Brand	GM
Part Type	High Pressure Diesel Fuel Injector
Years	2017–2023
Vehicle	Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, GMC Sierra 3500 HD
Engine Compatibility	6.6L V8 Diesel
Dimensions	8.9 × 3.8 × 3.4 in
Weight	3.25 lbs
Fitment Type	Direct Replacement

Product Features

The 12678992 high pressure diesel fuel injector is built to match factory performance and installation requirements:

Meters fuel with the precision required for the 6.6L Duramax common rail injection system
Engineered to match the original connector design and injector sealing surfaces
Designed to operate under the high fuel pressures used in compatible diesel applications
Helps maintain smooth idle quality, balanced fuel delivery, and efficient combustion
Manufactured to GM engineering standards for dependable performance in heavy-duty truck service

Application Notes

The 12678992 is designed for select 2017–2023 Chevrolet Silverado HD and GMC Sierra HD trucks equipped with the 6.6L Duramax diesel engine. Before installation, inspect the injector seat, fuel rail connections, and surrounding components to ensure the fuel system is clean and ready for service.

Verify the part number, VIN, engine configuration, and injector application before installation.