Allison Transmission Oil Cooler Lines for 2011–2014 Chevrolet Silverado & GMC Sierra 2500HD/3500HD 6.6L Duramax
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.
- 2011 Chevrolet Silverado 2500HD — 6.6L Duramax / Allison automatic
- 2012 Chevrolet Silverado 2500HD — 6.6L Duramax / Allison automatic
- 2013 Chevrolet Silverado 2500HD — 6.6L Duramax / Allison automatic
- 2014 Chevrolet Silverado 2500HD — 6.6L Duramax / Allison automatic
- 2011 Chevrolet Silverado 3500HD — 6.6L Duramax / Allison automatic
- 2012 Chevrolet Silverado 3500HD — 6.6L Duramax / Allison automatic
- 2013 Chevrolet Silverado 3500HD — 6.6L Duramax / Allison automatic
- 2014 Chevrolet Silverado 3500HD — 6.6L Duramax / Allison automatic
- 2011 GMC Sierra 2500HD — 6.6L Duramax / Allison automatic
- 2012 GMC Sierra 2500HD — 6.6L Duramax / Allison automatic
- 2013 GMC Sierra 2500HD — 6.6L Duramax / Allison automatic
- 2014 GMC Sierra 2500HD — 6.6L Duramax / Allison automatic
- 2011 GMC Sierra 3500HD — 6.6L Duramax / Allison automatic
- 2012 GMC Sierra 3500HD — 6.6L Duramax / Allison automatic
- 2013 GMC Sierra 3500HD — 6.6L Duramax / Allison automatic
- 2014 GMC Sierra 3500HD — 6.6L Duramax / Allison automatic
Important Fitment Note: Confirm the Allison transmission variant, production year, cooler routing, fitting ends and line quantity. These hoses are not for manual-transmission trucks.
Product Overview
These transmission oil lines carry automatic-transmission fluid between the Allison transmission and its external cooling circuit.
A leaking hose or corroded crimp can allow ATF loss and overheating. Replace leaking lines before low fluid level damages the transmission.
Confirm the Allison transmission variant, production year, cooler routing, fitting ends and line quantity. These hoses are not for manual-transmission trucks.
Key Features & Performance
- Transmission Cooler Line / Hose Set: These transmission oil lines carry automatic-transmission fluid between the Allison transmission and its external cooling circuit.
- Application & Configuration: Confirm the Allison transmission variant, production year, cooler routing, fitting ends and line quantity. These hoses are not for manual-transmission trucks.
Specifications
- Product Type: Transmission Cooler Line / Hose Set
- Position: Transmission / oil cooler lines
- Northline Parts SKU: NLT2S01570
Replaces / Cross-References
No manufacturer OE interchange number has been independently established for this listing. Match the original component, configuration and product photos rather than assuming that similarly named parts interchange.
Installation & Fitment Notes
Confirm the Allison transmission variant, production year, cooler routing, fitting ends and line quantity. These hoses are not for manual-transmission trucks.
Inspect the original component and all mating parts before fitting the replacement. Follow the vehicle or equipment manufacturer’s installation, torque, and safety procedures.
Frequently Asked Questions
Is this an OEM part?
No. This listing is for an aftermarket replacement. Original-equipment names and numbers identify the intended application; they do not indicate OEM manufacture.
How do I confirm that this is the right part?
Confirm the Allison transmission variant, production year, cooler routing, fitting ends and line quantity. These hoses are not for manual-transmission trucks.
What does the listing include?
Only the components shown in the listing photos are confirmed. Check the photos and package details before ordering; related hardware, fluids, or seals should not be assumed included.
Part Summary
Part: Transmission Cooler Line / Hose Set
Compatible Applications: 2011–2014 Chevrolet Silverado HD and GMC Sierra HD trucks using the Allison automatic transmission with 6.6L Duramax diesel
Position: Transmission / oil cooler lines
OEM / Reference Numbers: Not independently established
Purpose: These transmission oil lines carry automatic-transmission fluid between the Allison transmission and its external cooling circuit.
Northline Parts SKU: NLT2S01570
Keywords: Transmission Cooler Line / Hose Set, Allison Transmission Oil Cooler Lines for 2011–2014 Chevrolet Silverado & GMC Sierra 2500HD/3500HD 6.6L Duramax, NLT2S01570, Northline Parts, Chevrolet Silverado 2500HD, Chevrolet Silverado 3500HD, GMC Sierra 2500HD, GMC Sierra 3500HD