GM Radiator Surge Tank (Diesel)
Genuine GM · Part #84257137 · Engine / Cooling
Genuine GM radiator coolant surge (expansion) tank for diesel trucks.
- Part number
- 84257137
- Fits
- Chevrolet Silverado / GMC Sierra 2500 HD & 3500 HD, 6.6L Duramax diesel, 2017–2019; radiator coolant surge tank.
- Replaces
841389138417403784214124
- AutoNation price
- $121.82 (as of 2026-07-12)
Shop this part at AutoNation Parts →
Before you order
- Confirm it fits with your VIN before buying.
- The numbers under “Replaces” are older, superseded numbers — why GM part numbers change.
Details on this page were taken from the live AutoNation Parts listing (https://www.autonationparts.com/parts/gm-radiator-surge-tank-84257137) on 2026-07-12. Prices and availability can change — confirm on the retailer’s page before purchase.