84303179 Genuine GM Engine Wiring Harness Junction Block For Silverado Sierra 4.3L 5.3L 6.2L

84303179 Genuine GM Engine Wiring Harness Junction Block For Silverado Sierra 4.3L 5.3L 6.2L

Name: 84303179 Genuine GM Engine Wiring Harness Junction Block For Silverado Sierra 4.3L 5.3L 6.2L
Brand: GM
SKU: 84303179
Price: 348.00 USD
Availability: InStock

P/N: 84303179 Manufactured by: GM

$348.00 - $348.00

$348.00

$348.00 - $348.00

$348.00

8 in Stock

Condition: New

We accept:

Need help choosing the right part?Contact our support team

+1 828-705-1030

Monday – Saturday | 8:00 AM – 8:00 PM (EST)

2-3 Day Free Shipping

Return within 30-Days

Packed Ready to Ship

24/7 Expert Support

2-Year Warranty

Unit Auto Parts LLC provides a complimentary 2-Year Warranty on all automotive parts. Shop with confidence knowing your purchase is protected. Learn More

Description

The 84303179 is a genuine GM engine wiring harness junction block designed to link the engine harness with fuse circuits and vehicle control systems. It functions as a central electrical distribution unit that organizes multiple power and signal connections required for engine system operation.

Vehicle Compatibility

Year	Vehicle	Engine	Trims
2019	Chevrolet Silverado 1500 LD	5.3L V8 Flex, 5.3L V8 Gas	Custom, LT, WT
2019	Chevrolet Silverado 2500 HD	6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas	High Country, LT, LTZ, WT
2019	Chevrolet Silverado 3500 HD	6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas	High Country, LT, LTZ, WT
2019	GMC Sierra 1500 Limited	5.3L V8 Flex, 5.3L V8 Gas	Base, SLE
2019	GMC Sierra 2500 HD	6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas	Base, Denali, SLE, SLT
2019	GMC Sierra 3500 HD	6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas	Base, Denali, SLE, SLT
2018	Chevrolet Silverado 1500	4.3L V6 Flex, 5.3L V8 Electric/Gas, 5.3L V8 Flex, 5.3L V8 Gas, 6.2L V8 Gas	Custom, High Country, LS, LT, LTZ, SSV, WT
2018	Chevrolet Silverado 2500 HD	6.0L V8 CNG, 6.0L V8 Flex, 6.0L V8 Gas	High Country, LT, LTZ, WT
2018	Chevrolet Silverado 3500 HD	6.0L V8 Flex, 6.0L V8 Gas	High Country, LT, LTZ, WT
2018	GMC Sierra 1500	4.3L V6 Flex, 5.3L V8 Electric/Gas, 5.3L V8 Flex, 5.3L V8 Gas, 6.2L V8 Gas	Base, Denali, SLE, SLT
2018	GMC Sierra 2500 HD	6.0L V8 Flex, 6.0L V8 Gas	Base, Denali, SLE, SLT
2018	GMC Sierra 3500 HD	6.0L V8 Flex, 6.0L V8 Gas	Base, Denali, SLE, SLT
2017	Chevrolet Silverado 1500	4.3L V6 Flex, 5.3L V8 Electric/Gas, 5.3L V8 Flex, 5.3L V8 Gas, 6.2L V8 Gas	Custom, High Country, LS, LT, LTZ, SSV, WT
2017	Chevrolet Silverado 2500 HD	6.0L V8 Flex, 6.0L V8 Gas	High Country, LT, LTZ, WT
2017	Chevrolet Silverado 3500 HD	6.0L V8 Flex, 6.0L V8 Gas	High Country, LT, LTZ, WT
2017	GMC Sierra 1500	4.3L V6 Flex, 5.3L V8 Electric/Gas, 5.3L V8 Flex, 5.3L V8 Gas, 6.2L V8 Gas	Base, Denali, SLE, SLT
2017	GMC Sierra 2500 HD	6.0L V8 Flex, 6.0L V8 Gas	Base, Denali, SLE, SLT
2017	GMC Sierra 3500 HD	6.0L V8 Flex, 6.0L V8 Gas	Base, Denali, SLE, SLT

General Specifications

Condition	New
Part Number	84303179
Brand	GM
Part Type	Engine Wiring Harness Junction Block
Years	2017–2019
Vehicle	Chevrolet Silverado / GMC Sierra
Engine	4.3L V6, 5.3L V8, 6.0L V8, 6.2L V8
Dimensions	15.4 x 9.6 x 5.3 inches
Weight	3.70 lb
Fitment Type	Direct Replacement

Product Features

The 84303179 engine wiring harness junction block is built to match factory electrical system performance and installation requirements:

Genuine GM engine wiring harness junction block
Central interface for engine harness electrical connections
Distributes electrical power between engine components, relays, and fuse circuits
Designed to follow the original GM harness routing and mounting configuration
Supports correct routing of engine control and signal circuits
Factory-style connectors ensure proper electrical engagement

Application Notes

The 84303179 is designed for GM truck platforms that use this type of junction block to manage electrical distribution between engine harness circuits and fuse systems. It installs in the factory mounting location and connects directly to the original wiring harness connectors.

Always verify part number, engine configuration, and system type before installation.