25815388 Genuine GM Engine Wiring Harness Junction Block For Silverado Sierra 6.6L

Name: 25815388 Genuine GM Engine Wiring Harness Junction Block For Silverado Sierra 6.6L
Brand: GM
SKU: 25815388
Price: 499.00 USD
Availability: InStock

P/N: 25815388 Manufactured by: GM

$499.00 - $499.00

$499.00

$499.00 - $499.00

$499.00

1 in Stock

Condition: New

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Description

The 25815388 is a genuine GM engine wiring harness junction block designed for specified 2007–2009 Chevrolet Silverado HD and GMC Sierra HD trucks with the 6.6L V8 diesel engine. Located in the engine compartment, this unit provides an organized connection point for designated circuits within the factory wiring system.

Vehicle Compatibility

Year	Vehicle	Engine	Trims
2009	Chevrolet Silverado 2500 HD	6.6L V8 - Diesel	LT, LTZ, WT
2009	Chevrolet Silverado 3500 HD	6.6L V8 - Diesel	LT, LTZ, WT
2009	GMC Sierra 2500 HD	6.6L V8 - Diesel	SLE, SLT, WT
2009	GMC Sierra 3500 HD	6.6L V8 - Diesel	SLE, SLT, WT
2008	Chevrolet Silverado 2500 HD	6.6L V8 - Diesel	LT, LTZ, WT
2008	Chevrolet Silverado 3500 HD	6.6L V8 - Diesel	LT, LTZ, WT
2008	GMC Sierra 2500 HD	6.6L V8 - Diesel	SLE, SLT, WT
2008	GMC Sierra 3500 HD	6.6L V8 - Diesel	SLE, SLT, WT
2007	Chevrolet Silverado 2500 HD	6.6L V8 - Diesel	LT, LTZ, WT
2007	Chevrolet Silverado 3500 HD	6.6L V8 - Diesel	LT, LTZ, WT
2007	GMC Sierra 2500 HD	6.6L V8 - Diesel	SLE, SLT, WT
2007	GMC Sierra 3500 HD	6.6L V8 - Diesel	SLE, SLT, WT

General Specifications

Condition	New
Part Number	25815388
Brand	GM
Part Type	Engine Wiring Harness Junction Block
Years	2007–2009
Vehicle	Chevrolet Silverado 2500 HD, Silverado 3500 HD, GMC Sierra 2500 HD, Sierra 3500 HD
Engine Compatibility	6.6L 6599CC 403Cu. In. V8 Diesel OHV Turbocharged
Location	Engine Compartment
Alternative Names	Junction Block
Dimensions	15.4 × 9.6 × 5.8 in
Weight	4.65 lbs
Fitment Type	Direct Replacement

Product Features

The 25815388 engine wiring harness junction block is configured for the original electrical system used on compatible GM heavy-duty trucks:

Provides a central interface for designated wiring circuits within the engine compartment
Designed for specified Silverado HD and Sierra HD models equipped with the 6.6L V8 turbo diesel engine
Accommodates the corresponding factory harness connectors and electrical circuit arrangement
Fits the applicable Chevrolet Silverado 2500 HD and 3500 HD electrical configurations
Configured for compatible GMC Sierra 2500 HD and 3500 HD truck applications
Installs at the designated factory junction block location within the engine bay
Preserves the original wiring routing and connection layout when used with the correct vehicle configuration

Application Notes

The 25815388 engine wiring harness junction block is intended for specified 2007–2009 Chevrolet Silverado HD and GMC Sierra HD trucks equipped with the 6.6L V8 diesel engine. Compare the existing junction block, harness connectors, and vehicle electrical configuration before installation.

Always verify part number, VIN, engine configuration, production date, electrical connections, wiring harness configuration, and applicable factory options before installation.