Genuine GM Water Pump Assembly – 5.3L / 6.6L GEN V LT Series & L8T – Part #12683468 / 12687631

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Description

This is a genuine GM water pump assembly, designed for the GEN V LT series engines – specifically the 5.
3L and 6.

Genuine GM Parts 12728741 - 4.3L LV1 6-Cylinder Engine Assembly, Service

6L L8T variants.

GENUINE GM WATER Pump Assembly 12708893 $149.99

The part numbers are 12683468 and 12687631, both cross-referenced here.

GM 6.2 5.3 Gen V LT Series Engine Water Pump Tensioner 12668985 crate

If you're working on a Silverado, Sierra, or any GM truck with these motors, this is the factory-correct part.
The housing is made from aluminum – lightweight and good for heat dissipation.

Genuine GM Water Pump Assembly 6.6 L8T Gen V LT Series 12683468

It's been durability tested, so it's built to handle the demands of truck use.
This is a new-other item – it may have a small scuff from storage, but it's otherwise unused and fully functional.

Genuine GM Marine Water Pump Assembly 5.3L 6.2L Gen V LT Series

Made in the United States, so you're getting domestic quality.
The warranty from the seller is 60 days, which is decent for a factory part.

Gen V 2014 LT Header Bolt Kit 5.3L 6.2L LT L83 L86 L87 L8T LT2 LT4 L82 L84

If your original pump is leaking from the weep hole, making noise, or just not circulating coolant properly, this replacement will get your cooling system back to 100%.

Genuine GM Chevrolet GMC Throttle Body Assembly 5.3L GEN V LT 12729500

It's a direct fit, no adapters or modifications needed.
You'll need to transfer some components like the pulley and fan clutch from your old pump.
Great for DIY mechanics or shop repairs.

Vivi Ke on : Genuine GM Water Pump Assembly 5.3L 6.6L Gen V LT

Solid investment to keep your LT engine cool under load.