2018 GMC Sierra 2500 HD Cooling System Service Parts
145 parts verified to fit your 2018 GMC Sierra 2500 HD for a complete cooling system service. A moderate DIY project — estimated 2-4 hours.
Cooling Parts
(86)primary
Mishimoto
Mishimoto 17-19 Chevrolet Duramax 6.6L L5P Black Silicone Radiator Hose Kit
$337.87
Fel-Pro
Fel-Pro 03-13 Chevrolet Silverado 1500/06-13 Corvette/10-15 Camaro Engine Water Pump Gasket
$3.64
Wehrli
Wehrli L5P Duramax Thermostat Housing - Gloss Black
$189.44
Mishimoto
Mishimoto 10-15 Chevy Camaro SS/ZL1 / 09-13 Chevy Corvette / 09-15 Cadillac CTS-V Racing Thermostat
$70.60
BD Diesel
BD Diesel 17-19 Chevrolet/GM Allison Cooler Bypass Delete
$97.04
Mishimoto
Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit
$151.50
Fel-Pro
Fel-Pro 09-14 Chevrolet Silverado 1500/08-13 Corvette/14-15 Camaro Engine Oil Cooler Gasket
$3.16
Wehrli
Wehrli 17-19 Chevrolet 6.6L L5P Duramax Upper Coolant Pipe - Bengal Blue
$174.08
Coolant & Fluids
(59)consumable
aFe
aFe ProGuard D2 Fluid Filters Oil F/F OIL GM Diesel Trucks 01-11 V8-6.6L (td)
$16.38
LIQUI MOLY
LIQUI MOLY 1L Brake Fluid SL6 DOT 4
$65.86
Yukon Gear & Axle
Yukon Gear Redline Synthetic Shock Proof Oil w/ Positraction Additive. 3 Quarts
$112.89
Royal Purple
Royal Purple Duralec Super Diesel 15W40 CK-4 Motor Oil - 1 Gallon
$107.38
LIQUI MOLY
LIQUI MOLY 205L Molygen New Generation Motor Oil SAE 5W30
$1866.84
Royal Purple
Royal Purple Max Gear Synthetic 75W90 Gear Oil (Canada) - 1 Quart
$101.94
Fleece Performance
Fleece Performance 01-07 GM Duramax/11-16 GM 2500/3500 Duramax Oil Cooler Adapter Kit
$107.71
LIQUI MOLY
LIQUI MOLY 250mL Brake Fluid DOT 5.1
$124.97
Cooling System Service for Other GMC Sierra 2500 HD Years
Other Jobs for Your 2018 GMC Sierra 2500 HD
Frequently Asked Questions
What parts do I need for a cooling system service on my 2018 GMC Sierra 2500 HD?
A complete cooling system service on the 2018 GMC Sierra 2500 HD typically requires cooling parts, coolant & fluids. All parts shown on this page are verified to fit your specific vehicle.
How long does a cooling system service take on a 2018 GMC Sierra 2500 HD?
A cooling system service typically takes 2-4 hours and is rated as moderate difficulty. Actual time may vary depending on your experience and the specific parts being replaced.
Can I do a cooling system service myself?
A cooling system service is a moderate DIY project. If you have some mechanical experience and the right tools, you can handle it. Otherwise, consider having a professional do the work.
Are these parts guaranteed to fit my 2018 GMC Sierra 2500 HD?
Yes, all parts on this page are verified to fit the 2018 GMC Sierra 2500 HD using VCDB fitment data from manufacturers. Our fitment information is cross-referenced with industry-standard vehicle databases to ensure accuracy.
What brands make cooling system service parts for the 2018 GMC Sierra 2500 HD?
We carry cooling system service parts from trusted brands including Mishimoto, Fel-Pro, Wehrli, BD Diesel, and aFe. Filter by brand to find your preferred manufacturer.
How much does a cooling system service cost for a 2018 GMC Sierra 2500 HD?
The cost of a cooling system service for the 2018 GMC Sierra 2500 HD depends on the parts and brands you choose. Browse the parts on this page to see current pricing. Doing the work yourself saves significantly on labor costs.