Skip to product information
SKU:
NLT2S01288
Ships for free in 2–4 business days.
Engine Wiring Harness 12557047 for Chevrolet & GMC 6.5L Diesel 1994–2002
$215.39
In Stock
$215.39
Sale price
$215.39
Regular price
This engine wiring harness is intended for select Chevrolet and GMC vehicles with the 6.5L diesel engine using part number #12557047. It replaces damaged wiring in the matching engine harness arrangement.
Estimated delivery between
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- Chevrolet 6.5L diesel trucks — 1994–2002, matching wiring configuration
- GMC 6.5L diesel trucks — 1994–2002, matching wiring configuration
Product Overview
Age, vibration, heat and past repairs can leave connectors or wire insulation brittle on older diesel trucks. An appropriate harness replacement can address confirmed continuity faults without piecing together individual damaged wires.
Because wiring changed by model year, injection-control equipment and truck configuration, verify the connector count, routing, transmission-related plugs and original wiring part number.
Key Features & Performance
- Engine-side electrical wiring harness
- Black wiring/loom finish
- OE reference 12557047
Replaces / Cross-References
- 12557047
What Is Included
One replacement component or assembly, unless the supplier package specifies otherwise.
Fitment Notes
Compare every connector with the original harness. A matching diesel engine and year range do not guarantee the same electrical harness.
Common Reasons for Replacement
- Brittle or broken engine wiring
- Intermittent electrical faults
- Damaged engine connectors
Frequently Asked Questions
Is this an OEM part? No. Unless specifically identified otherwise, this is an aftermarket replacement or accessory. Brand names and part numbers identify the intended application, not manufacturer authorization.
How do I confirm fitment? Compare every connector with the original harness. A matching diesel engine and year range do not guarantee the same electrical harness.
Part Summary
keywords: Engine Wiring Harness 12557047 for Chevrolet & GMC 6.5L Diesel 1994–2002, 12557047, Chevrolet 6.5L diesel trucks, GMC 6.5L diesel trucks, Brittle or broken engine wiring, Intermittent electrical faults
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.