



01-16 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML Dorman Idler Pulley
$37.51
- Part Number: 419-623
- Est. Ship Time: Usually Ships In 1-2 Business Days
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Fits: 2001-2016 Gm 6.6L Duramax LB7/LLY/LBZ/LML
This Dorman 419-623 Idler Pulley for your 2001-2016 GM 6.6L Duramax is built to route the serpentine belt for proper alignment with the accessory drive belt, thereby keeping the alternator charging, the water pump running, and the power steering pump and A/C compressor operating properly.
Features:
- Direct Fit
- Stop Squeaks & Other Noises
- Replaces GM Part # 98072072
Dorman: 419-623

Fluidampr Harmonic BalancerFor 2011-2016 Chevy/GM 6.6L Duramax Diesels
A new Fluidampr on your diesel truck will not only protect your engi..
$547.82
Fits: 2001-2018 GM 6.6L DuramaxLB7/LLY/LBZ/LMM/LML/L5P (For Use With Fluidampr)Firmly mount the Fluidampr on your 2001-2018 Gm 6.6L Duramax with t..
$88.43
Fits: 2002-2016 GM 2500HD/3500HD 6.6L Duramax LB7/LLY/LBZ/LMM/LML | 2006-2016 GM Express/Savana 6.6L Duramax LLY/LGH | 2003-2009 GM Kodiak/ Topkick C4..
$66.11
This high quality PCV Cap is machined out of a single piece of aluminum stock and has a pre-installed o-ring for a 100% leak free install.Included..
$81.84
Fits: 2002-2005 GM 2500HD/3500HD 6.6L Duramax LB7/LLY (Single Alternator, See Applicaitons) | 2011-2014 GM 2500HD/3500HD 6.6L Duramax LML (Single..
$42.54
Replace your leaking transmission lines with our heavy duty, high flow, flexible transmission lines. Our kit is the most complete replacement transmis..
$329.99
Replace your MAP sensor on your 2011-2016 Duramax with this genuine OE MAP sensor from GM.APPLICATION NOTES2011-2016 6.6L LML & LGH Durama..
$26.05
Replace the restrictive crushed factory down pipe on your 2011-2016 LML Duramax with this full 3" Stainless Steel down pipe. For use with factory..
$257.05
Genuine Bosch Fuel Rail Pressure sensor for 11-16 GM LML 6.6L Duramax.If you have a rough idle, poor fuel economy, and low power, this may be the..
$83.15
AVAILABLE OPTIONS:
* 50 State LML CP3 conversion kit w/pump – CARB EO #D-756-4 – No Tuning Required - Emissions Intact
* LML CP3 c..
$810.00
Give your vehicle the most advanced digital monitoring system when you install the Edge 84130-3 Insight CTS3 Digital Gauge Monitor. The Edge Insight i..
$449.95 $499.95
Fits: 2001-2023 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML/L5P (Non-Stock, Internally Balanced Engines)This damper is for HIGH PERFORMANCE BUILT ENGINES..
$574.82
Flo Pro 4 Inch Inlet, 7 Inch Outlet, 15 Inch Length
Weld On Chrome Exhaust Tip, Angle Cut
Part number: 407015AC..
$91.25
Max-Flow Duramax Oil Cooler Upgrade KitFits 2001-2007 LB7 LLY LBZ 6.6L Duramax & 2011-2019 LML L5P 6.6L DuramaxThe Max-Flow Duramax Oil Co..
$578.25
Includes flywheel lock, all gaskets, and o-rings for installation. The seal between housing and gasket is installed. Bolts are torqued. Some existing ..
$279.75
The Dorman 904-412 Left Side Glow Plug Harness is a direct replacement for your worn out, oil-drenched or dry rotted glow plug harness on your 2008-20..
$50.43
Dorman Engine Oil Cooler Line (Inlet, Lower)Part number: 625-164..
$57.69
This fuel water separator drain valve is designed to match the fit and function of the original valve on specified vehicles, and is engineered for dur..
$27.36
Wheel hub bolts stripped, bent or seized? These wheel hub bolts directly replace the original bolts on certain vehicle years, makes and models.&nb..
$38.11
Replacing a drive shaft doesn't have to be complicated. This complete drive shaft assembly is pre-balanced and ready to install with 100% new yokes, t..
$451.36
Fuel lines on certain Ford and International vehicles leak due to vibration from a weak bracket. This Dorman OE FIX upgrades the bracket to prevent fu..
$52.89
This replacement engine coolant thermostat housing is engineered to match the fit and durability of the stock thermostat housing on specified vehicles..
$40.09
Original equipment brake lines are highly rust prone. This Dorman OE FIX brake hydraulic line kit is made of upgraded stainless steel to resist corros..
$148.93
Fits: 2001-2003 GM Silverado/Sierra 2500HD/3500HD (See Applications) This Dorman 800-605 Transmission Line Fitting (3/8" X 5/8"..
$9.04
Fits: 2001-2004 GM 6.6L DuramaxDon't take chances with an old, questionable, or malfunctioning camshaft position sensor that can leave you strande..
$81.21
Fits: 2001-2004 GM 6.6L Duramax LB7 2500HD/3500HD | 2003-2004 GM C4500/5500 Kodiak/Topkick 6.6L Duramax LB7Purchase this Dorman 300-825 Engine Coo..
$293.48
Fits: 2001-2004 GM 6.6L Duramax LB7This Dorman Fuel Return Line Banjo Bolt (Return Pipe) is the perfect replacement component your truck needs. Ea..
$11.28
Fits: 2001-2004 GM 6.6L Duramax LB7This Dorman Glow Plug Harness Relay is perfect for what your truck needs. This part is an OE-style solution for..
$55.16
Fuel leaking from the filter housing? This direct-replacement fuel filter housing eliminates leaks from a damaged coupling to eliminate rough-start an..
$154.04
This transmission range sensor is designed to match the fit and function of the original sensor on specified vehicles, and is engineered for durabilit..
$141.38
Stabilize your serpentine belt under high load and high rpm with DHD's add-on belt idler kit. These kits require no belt changes and no modification t..
$119.95
DHD Duramax AC Delete kit is a complete kit that will allow you to remove the AC compressor on your LB7, LLY, LBZ, LMM, LML and L5P equipped GM trucks..
$119.00
Fits: 2001-2023 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML/L5P (Non-Stock, Internally Balanced Engines)This damper is for HIGH PERFORMANCE BUILT ENGINES..
$574.82
Fits: 2002-2005 GM 2500HD/3500HD 6.6L Duramax LB7/LLY | 10-16 GM Express/Savana 6.6L Duramax LGHInstalling this Dayco 5061178 Poly Rib..
$33.50
Fits: 2002-2005 GM 2500HD/3500HD 6.6L Duramax LB7/LLY (Single Alternator, See Applicaitons) | 2011-2014 GM 2500HD/3500HD 6.6L Duramax LML (Single..
$42.54
Fits: 2002-2016 GM 2500HD/3500HD 6.6L Duramax LB7/LLY/LBZ/LMM/LML | 2006-2016 GM Express/Savana 6.6L Duramax LLY/LGH | 2003-2009 GM Kodiak/ Topkick C4..
$66.11
Fits: 2003-2005 GM 2500HD/3500HD 6.6L Duramax LB7/LLY (Dual Alternators, (See Applications) | 2010-2012 GM Express/Savana 6.6L Duramax LGH (Dual Alter..
$41.82
Fits: 2011-2016 GM 6.6L Duramax LML/LGHThis XDP XD708 Premium Balancer Series- Stock Replacement Harmonic Balancer is the perfect componen..
$484.95
Wagler Competition Duramax Mechanical Belt TensionerDoes away with the weak factory spring belt tensionerThese are a MUST when running dual CP3 pumps ..
$375.00
Gator Fasteners heavy duty harmonic damper bolt for 01-19 Duramax. If you are wanting to keep your 6.6L Duramax on the road for the long haul, you nee..
$36.99
Dayco aramid cord poly rib serpentine belt (main drive) for 6.6L Duramax.**Fitment note**2015-2021 Chevy Silverado 2500HD/ 3500HD 6.6L Duramax Single ..
$42.65
Backordered No ETA (Updated on 10/31/25)Fits: Universal-Fits Many Spring-Loaded Idler Pulleys This CTA Tools A875 Serpentine..
$38.97
ATI Diesel Super Dampers2011+ GM 6.6L LML Duramax Diesel Super DamperPart number: 917376Do you have a high horsepower diesel truck? If so, ATI has the..
$493.83
Fluidampr Harmonic BalancerFor 2011-2016 Chevy/GM 6.6L Duramax Diesels
A new Fluidampr on your diesel truck will not only protect your engi..
$547.82








































