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The Wehrli WCF100224-GW is built for the verified application below and gives buyers a clearly defined configuration, finish, and installation scope before ordering.
| Years | Make | Model | Required configuration |
|---|---|---|---|
| 2020 - 2026 | Chevrolet | Silverado 2500 HD | Wehrli WCF100224-GW, gloss white auxiliary coolant tank for the fuel-cooling circuit; factory 6.6L L5P Duramax diesel only. Requires the original GM 84211275 reservoir location and OEM mounting points. Not the main engine coolant expansion/surge tank, a gasoline L8T application, or a generic 6.6L-engine fit. Confirm the actual reservoir and hose interfaces before ordering. |
| 2020 - 2026 | Chevrolet | Silverado 3500 HD | Wehrli WCF100224-GW, gloss white auxiliary coolant tank for the fuel-cooling circuit; factory 6.6L L5P Duramax diesel only. Requires the original GM 84211275 reservoir location and OEM mounting points. Not the main engine coolant expansion/surge tank, a gasoline L8T application, or a generic 6.6L-engine fit. Confirm the actual reservoir and hose interfaces before ordering. |
| 2020 - 2026 | GMC | Sierra 2500 HD | Wehrli WCF100224-GW, gloss white auxiliary coolant tank for the fuel-cooling circuit; factory 6.6L L5P Duramax diesel only. Requires the original GM 84211275 reservoir location and OEM mounting points. Not the main engine coolant expansion/surge tank, a gasoline L8T application, or a generic 6.6L-engine fit. Confirm the actual reservoir and hose interfaces before ordering. |
| 2020 - 2026 | GMC | Sierra 3500 HD | Wehrli WCF100224-GW, gloss white auxiliary coolant tank for the fuel-cooling circuit; factory 6.6L L5P Duramax diesel only. Requires the original GM 84211275 reservoir location and OEM mounting points. Not the main engine coolant expansion/surge tank, a gasoline L8T application, or a generic 6.6L-engine fit. Confirm the actual reservoir and hose interfaces before ordering. |
2020-2026 Chevrolet Silverado 2500 HD and 3500 HD and GMC Sierra 2500 HD and 3500 HD equipped with the 6.6L L5P Duramax. This auxiliary tank serves the fuel-cooler circuit and replaces GM 84211275 at the factory mounting location.
| Detail | Value |
|---|---|
| Manufacturer Part Number | WCF100224-GW |
| Application | 2020-2026 GM HD trucks with the 6.6L L5P Duramax |
| Tank Function | Auxiliary coolant reservoir for the fuel cooler |
| Material | Fabricated aluminum |
| Finish | Gloss white powder coat |
| Cap | Black anodized billet aluminum |
| Mounting | OEM location and mounting points |
| Replaces | GM 84211275 |
| Manufacturer Availability | Gloss white listed in stock with a stated 3-5 business-day lead time |
Wehrli Custom Fabrication designs and manufactures diesel-truck cooling, engine-bay, chassis, and exterior components in the United States, with application and configuration details published for each part.
L5P Auxiliary Coolant Tank Kit is the exact Wehrli product described in this listing.
Does this replace the engine coolant surge tank?No. It replaces the auxiliary reservoir used by the L5P fuel-cooler circuit.
Will it mount in the factory location?Yes. Wehrli specifies the OEM mounting location and mounting points for the listed trucks.
Is this the gloss white version?Yes. This listing is for the gloss white powder-coated configuration shown in the retained product images.
Does the truck need modifications?Wehrli states that it fits a stock truck without other modifications.
What GM reservoir does it replace?The manufacturer identifies GM part number 84211275 as the reservoir replaced by this kit.
Is a cap included?Yes. A black anodized billet aluminum cap is included.
Are the hose and hardware included?Yes. The manufacturer lists a preformed hose, overflow fitting, and mounting hardware.
California Proposition 65 Warning: Cancer and reproductive harm. See www.P65Warnings.ca.gov.
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