{
    "lazyNodes": false,
    "abFitnotesFlag": false,
    "abCrawlReviews": true,
    "productOptionsCookie": false,
    "orderDelayFlag": false,
    "skipSessionCookie": false,
    "covidMessage": false,
    "fullTitleCookie": false,
    "nrLoggerCookie": true,
    "checkoutReviewCookie": false,
    "productOptionSeqCookie": false,
    "maintenanceFlag": false,
    "bufferETACookie": false,
    "multiShippingDiscountFlag": false,
    "newFitmentFlag": false,
    "surveyOptInFlag": true,
    "crossSellFlag": false,
    "skuMappingFlag": false,
    "paySplitCookie": false,
    "callDisableFlag": true,
    "zipPaymentFlag": "c",
    "hassleFreeReturn": true,
    "lifetimeReplacement": true,
    "cpn_off": false
}
2018 GMC Sierra 2500 HD
1
0
Price Match Guarantee
60-Day Returns
Lifetime Replacement
Price Match Guarantee
60-Day Returns
Lifetime Replacement
2018 GMC Sierra 2500 HD

2018 GMC Sierra 2500 HD Coolant Reservoirs

Refine by:

Shop Catalog

Showing 1 - 11 of 11 results
Sort by:
Coolant Reservoir, 8 Cyl., 6.0L Engine, without Cap -
Replacement
Coolant Reservoir, 8 Cyl., 6.0L Engine, without Cap -
Part Number: REPC161314
Guaranteed to Fit
$28.99
Vehicle Fitment
  • 2018 GMC Sierra 2500 HD Base 8 Cyl 6.0L
  • 2018 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2018 GMC Sierra 2500 HD Denali 8 Cyl 6.0L
  • 2018 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
Product Details
Notes : Without CapProduct Fit : Direct FitQuantity Sold : Sold individuallyReplaces OE Number : 84368363, 22870828Replaces Partslink Number : GM3014113Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 603054, 84368363, 22870828, GM3014113Returns Policy : 30-Day Return Policy
Coolant Reservoir, 8 Cyl., 6.0L Engine, with 20 PSI Cap -
Replacement
Coolant Reservoir, 8 Cyl., 6.0L Engine, with 20 PSI Cap -
Part Number: REPC161315
Guaranteed to Fit
$37.49
Vehicle Fitment
  • 2018 GMC Sierra 2500 HD Base 8 Cyl 6.0L
  • 2018 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2018 GMC Sierra 2500 HD Denali 8 Cyl 6.0L
  • 2018 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
Product Details
Notes : With 20 PSI capProduct Fit : Direct FitQuantity Sold : Sold individuallyReplaces OE Number : 84368363-PFM, 22870828-PFMReplaces Partslink Number : GM3014115Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 603054, 84368363-PFM, 22870828-PFM, GM3014115Returns Policy : 30-Day Return Policy
Coolant Reservoir, 8 Cyl., 6.0L Engine, with 15 PSI Cap -
Replacement
Coolant Reservoir, 8 Cyl., 6.0L Engine, with 15 PSI Cap -
Part Number: REPC161323
Guaranteed to Fit
$28.49
Vehicle Fitment
  • 2018 GMC Sierra 2500 HD Base 8 Cyl 6.0L
  • 2018 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2018 GMC Sierra 2500 HD Denali 8 Cyl 6.0L
  • 2018 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
Product Details
Notes : With 15 PSI capProduct Fit : Direct FitQuantity Sold : Sold individuallyReplaces OE Number : 22870828-PFMReplaces Partslink Number : GM3014118Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 603054, 22870828-PFM, GM3014118Returns Policy : 30-Day Return Policy
Coolant Reservoir, 8 Cyl., 6.6L Engine, 2-Door, Standard Cab Pickup/4-Door, Extended Cab Pickup 4-Door -
AC Delco®
Coolant Reservoir, 8 Cyl., 6.6L Engine, 2-Door, Standard Cab Pickup/4-Door, Extended Cab Pickup 4-Door -
Part Number: AC84257137
Guaranteed to Fit
$127.49
Vehicle Fitment
  • 2018 GMC Sierra 2500 HD Base 8 Cyl 6.6L 2-Door, Standard Cab Pickup
  • 2018 GMC Sierra 2500 HD SLT 8 Cyl 6.6L 4-Door, Crew Cab Pickup
  • 2018 GMC Sierra 2500 HD Denali 8 Cyl 6.6L 4-Door, Crew Cab Pickup
  • 2018 GMC Sierra 2500 HD SLE 8 Cyl 6.6L 2-Door, Standard Cab Pickup
Product Details
Notes : 9.63 in. Length; 12.07 in. Height; Screw-On Cap Type; (1) Mount Hole; Plastic Material; Does not include capProduct Fit : Direct FitQuantity Sold : Sold individuallyWarranty : Lifetime AC Delco limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : GM Original Equipment Series
Coolant Reservoir, 8 Cyl., 6.0L Engine -
AC Delco®
Coolant Reservoir, 8 Cyl., 6.0L Engine -
Part Number: AC84368363
Guaranteed to Fit
$67.99
Vehicle Fitment
  • 2018 GMC Sierra 2500 HD Base 8 Cyl 6.0L L96 Engine, VIN G, 4-Door, Extended Cab Pickup
  • 2018 GMC Sierra 2500 HD SLT 8 Cyl 6.0L L96 Engine, VIN G, 4-Door, Crew Cab Pickup
  • 2018 GMC Sierra 2500 HD Denali 8 Cyl 6.0L L96 Engine, VIN G, 4-Door, Crew Cab Pickup
  • 2018 GMC Sierra 2500 HD SLE 8 Cyl 6.0L L96 Engine, VIN G, 2-Door, Standard Cab Pickup
Product Details
Product Fit : Direct FitQuantity Sold : Sold individuallyWarranty : 24-months or unlimited mile AC Delco limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Coolant Reservoir, 8 Cyl., 6.6L Engine -
Dorman®
Coolant Reservoir, 8 Cyl., 6.6L Engine -
Part Number: RB603009
Guaranteed to Fit
$86.49
Vehicle Fitment
  • 2018 GMC Sierra 2500 HD SLT 8 Cyl 6.6L
  • 2018 GMC Sierra 2500 HD Denali 8 Cyl 6.6L
  • 2018 GMC Sierra 2500 HD SLE 8 Cyl 6.6L
  • 2018 GMC Sierra 2500 HD Base 8 Cyl 6.6L
Product Details
Notes : 17.9 qt Capacity; 20 PSI Pressure Rating; 9.5 in. Length; 3.92 in. Height; Plastic Material; Irregular ShapeProduct Fit : Direct FitQuantity Sold : Sold individuallyReplaces OE Number : 84148294, 84257137Warranty : Lifetime Dorman limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : OE Solutions SeriesInterchange Part Number : 84148294, 84257137
Coolant Reservoir, 8 Cyl., 6.0L Engine, with 20 PSI Cap -
ReplaceXL
Coolant Reservoir, 8 Cyl., 6.0L Engine, with 20 PSI Cap -
Part Number: R-REPC161315
Guaranteed to Fit
$30.31
Vehicle Fitment
  • 2018 GMC Sierra 2500 HD Base 8 Cyl 6.0L
  • 2018 GMC Sierra 2500 HD SLT 8 Cyl 6.0L
  • 2018 GMC Sierra 2500 HD Denali 8 Cyl 6.0L
  • 2018 GMC Sierra 2500 HD SLE 8 Cyl 6.0L
Product Details
Notes : With 20 PSI capProduct Fit : Direct FitQuantity Sold : Sold individuallyReplaces OE Number : 84368363-PFM, 22870828-PFMReplaces Partslink Number : GM3014115Warranty : 1-year ReplaceXL unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Interchange Part Number : 603054, 84368363-PFM, 22870828-PFM, GM3014115Returns Policy : 30-Day Return Policy
Coolant Overflow Tank-Stainless Steel, 3in. X 10in.
Mr Gasket®
Coolant Overflow Tank-Stainless Steel, 3in. X 10in.
Part Number: G129133
Universal Fit
$88.79
Product Details
Notes : Does not replace original reservoir; With cap; Includes mounting hardwareProduct Fit : UniversalQuantity Sold : Sold individuallyWarranty : 90-day Mr Gasket limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Coolant Overflow Tank-Stainless Steel, 2in. X 13in.
Mr Gasket®
Coolant Overflow Tank-Stainless Steel, 2in. X 13in.
Part Number: G129130G
Universal Fit
$110.95
Product Details
Notes : Does not replace original reservoir; With cap; Includes mounting hardwareProduct Fit : UniversalQuantity Sold : Sold individuallyWarranty : 90-day Mr Gasket limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Coolant Overflow Tank-Stainless Steel, 3in. X 9in.
Mr Gasket®
Coolant Overflow Tank-Stainless Steel, 3in. X 9in.
Part Number: G129135
Universal Fit
$96.25
Product Details
Notes : Does not replace original reservoir; With cap; Includes mounting hardwareProduct Fit : UniversalQuantity Sold : Sold individuallyWarranty : 90-day Mr Gasket limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Universal Coolant Reservoir, 6 in. L x 6 in. W x 8 in. H, With Twist Cap
Dorman®
Universal Coolant Reservoir, 6 in. L x 6 in. W x 8 in. H, With Twist Cap
Part Number: RB603001
Universal Fit
$12.49
Product Details
Notes : Does not replace original reservoir; This is an overflow tank, not a pressurized surge tank (coolant return system); Size - 6 in. L x 6 in. W x 8 in. H; With Twist Cap; Plastic Material; Includes Mounting BracketsProduct Fit : UniversalQuantity Sold : Sold individuallyWarranty : Lifetime Dorman limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : OE Solutions Series
Page 1 of 1 | Showing 1 - 11 of 11 results

Top Rated Products

Dorman Coolant Reservoir, 8 Cyl., 6.6L Engine -
$86.49( Review)
Perfect fit first time!
Mitchell B.
VERIFIED PURCHASER
Replacement Coolant Reservoir, 8 Cyl., 6.0L Engine, with 15 PSI Cap -
$28.49( Review)
I opened the box and my first one was crack and I called customer service and they seSee More
Tristen H.
VERIFIED PURCHASER
AC Delco Coolant Reservoir, 8 Cyl., 6.6L Engine, 2-Door, Standard Cab Pickup/4-Door, Extended Cab Pickup 4-Door -
$127.49( Review)
The part was a direct fit, easy to install, and was shipped to my door step in no timSee More
Manuel C.
VERIFIED PURCHASER

Popular Products

Product Questions & Answers

Dorman Universal Coolant Reservoir, 6 in. L x 6 in. W x 8 in. H, With Twist Cap
$12.49
Q:Hello, Will this item fit a 93 Ford E150 econoline van?
Nikole L.
A:BEST ANSWERHi Nikole, I'm glad to assist you. No, it won't. Unfortunately, we don't carry direct-fit coolant reservoirs for the 1993 E-150. We suggest checking the local part stores around your area on what they have available to offer you. I hope this helps, and we thank you for inquiring. Show less
Arnel E.
 
5 Questions, 1 AnswerView all Q&As >

Helpful Automotive Resources

Where Is the Coolant Reservoir Located?
Where Is the Coolant Reservoir Located?Pro Tips are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.
Why Is My Coolant Boiling?
Why Is My Coolant Boiling?The radiator cap maintains the ideal pressure in the cooling system. When the cap is damaged or loose, air can enter the system and disrupt its operating temperature, which could cause the coolant to boil. A failed radiator cap can also cause the cooling system to vent, increasing the temperature
2023 National Car Care Month: Your DIY Maintenance and Road Safety Checklist
2023 National Car Care Month: Your DIY Maintenance and Road Safety ChecklistGetting an oil change is probably at the top of your list when it comes to sticking to your vehicle’s preventive maintenance schedule. While there are manufacturer-recommended intervals for oil changes, your driving conditions may cause the engine oil to deteriorate at a faster rate.
Leaking Coolant Reservoir: Symptoms and Replacement Cost
Leaking Coolant Reservoir: Symptoms and Replacement CostRemember that coolant is toxic since it’s a mix of glycol and water. If you spot a coolant leak, clean it immediately to prevent your pets from ingesting the compound. Coolant is also considered hazardous waste, so it should be thrown away in a sealed container and sent to service
Common Problems After Engine Replacement Plus Prevention Tips
Common Problems After Engine Replacement Plus Prevention Tips Pro Tip: The smart thing to do is to take your time and make sure you install every component right. If the engine you’re installing is a
How Hot Does a Radiator Get?
How Hot Does a Radiator Get?Since it is a heat exchanger, the engine’s radiator naturally gets hot, especially after a bit of driving. But how hot does it actually get? Since it is a heat exchanger, the engine’s radiator naturally gets hot, especially after a bit of driving.