12678993 Genuine GM Fuel Injection Pump For Silverado Sierra 6.6L Diesel

Name: 12678993 Genuine GM Fuel Injection Pump For Silverado Sierra 6.6L Diesel
Brand: GM
SKU: 12678993
Price: 725.00 USD
Availability: InStock

P/N: 12678993 Manufactured by: GM

$725.00 - $725.00

$725.00

$725.00 - $725.00

$725.00

3 in Stock

Condition: New

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Description

The 12678993 is a genuine GM high-pressure fuel injection pump intended for the specified Chevrolet Silverado HD and GMC Sierra HD trucks with the 6.6L V8 diesel engine. It pressurizes diesel fuel for delivery into the engine injection circuit and fits the established GM fuel-system layout.

Vehicle Compatibility

Year	Vehicle	Engine	Trims
2026	GMC Sierra 2500 HD	6.6L V8 - Diesel	AT4, AT4X, Denali, Denali Ultimate, Pro, SLE, SLT
2025	Chevrolet Silverado 2500 HD	6.6L V8 - Diesel, 6.6L V8 - Flex, 6.6L V8 - Gas	Custom, High Country, LT, LTZ, WT, ZR2
2025	Chevrolet Silverado 3500 HD	6.6L V8 - Diesel, 6.6L V8 - Flex, 6.6L V8 - Gas	High Country, LT, LTZ, WT
2025	GMC Sierra 2500 HD	6.6L V8 - Diesel, 6.6L V8 - Flex, 6.6L V8 - Gas	AT4, AT4X, Denali, Denali Ultimate, Pro, SLE, SLT
2025	GMC Sierra 3500 HD	6.6L V8 - Diesel, 6.6L V8 - Flex, 6.6L V8 - Gas	AT4, Denali, Denali Ultimate, Pro, SLE, SLT
2024	Chevrolet Silverado 2500 HD	6.6L V8 - Diesel, 6.6L V8 - Flex, 6.6L V8 - Gas	Custom, High Country, LT, LTZ, WT, ZR2
2024	Chevrolet Silverado 3500 HD	6.6L V8 - Diesel, 6.6L V8 - Flex, 6.6L V8 - Gas	High Country, LT, LTZ, WT
2024	GMC Sierra 2500 HD	6.6L V8 - Diesel, 6.6L V8 - Flex, 6.6L V8 - Gas	AT4, AT4X, Denali, Denali Ultimate, Pro, SLE, SLT
2024	GMC Sierra 3500 HD	6.6L V8 - Diesel, 6.6L V8 - Flex, 6.6L V8 - Gas	AT4, Denali, Denali Ultimate, Pro, SLE, SLT
2023	GMC Sierra 3500 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	GMC Sierra 3500 HD	6.6L V8 - Diesel	AT4, Base, Denali, SLE, SLT
2020	GMC Sierra 3500 HD	6.6L V8 - Diesel	AT4, Base, Denali, SLE, SLT

General Specifications

Condition	New
Part Number	12678993
Brand	GM
Part Type	High-Pressure Fuel Injection Pump
Years	2020–2026
Vehicle	Chevrolet Silverado HD, GMC Sierra HD
Engine Compatibility	6.6L V8 Diesel
Fuel System Function	High-Pressure Diesel Fuel Delivery
Dimensions	10.4 × 9.7 × 8.5 in
Weight	12.30 lbs
Fitment Type	Direct Replacement
Related Service Parts	Seal and Bolt

Product Features

The 12678993 high-pressure fuel injection pump is configured to operate within the factory 6.6L diesel fuel system:

Raises diesel fuel to the pressure required by the engine injection circuit
Works with the fuel-system configuration specified for applicable Silverado HD and Sierra HD trucks
Interfaces with the existing fuel lines and related injection components
Mounts at the designated high-pressure pump position on the 6.6L V8 diesel engine
Maintains fuel delivery through the original high-pressure circuit during engine operation
Uses the associated seal and bolt identified for servicing this pump installation

Application Notes

The 12678993 applies to the specified GM heavy-duty truck configurations equipped with the applicable 6.6L V8 diesel fuel system. Inspect the fuel connections and mounting area before installation, and account for the related seal and bolt identified as non-reusable service components.

Verify part number, VIN, model year, 6.6L V8 diesel engine, fuel-system configuration, and applicable factory equipment before installation.