2001-2004 GM 2500HD/3500HD 6.6L LB7 Duramax Transmission Coolers, Lines & Accessories

Ensuring your GM 6.6L transmission maintains optimal temperature keeps it performing its best during heavy towing, off-roading, and daily driving. High-performance activities generate excess heat, which can strain your transmission and lead to premature wear and tear. For enhanced performance and long-term reliability, our selection of transmission coolers and thermal bypasses is the ideal solution for your transmission. Whether you opt for upgraded coolers for enhanced cooling efficiency or thermal bypasses to keep fluid temperatures cool, we have everything you need to keep your transmission running smoothly and reliably. Check out our selection of Transmission pans, filters, fluid for additional cooling performance!  GM Duramax Fitments: 2001, 2002, 2003, 2004 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.

GM Duramax>2001-2004 6.6L LB7
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PPE 418020000 Marine Flywheel | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
PPE 418020000 Marine Flywheel | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

PPE

PPE 418020000 Marine Flywheel | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PPE418020000
Price
$1,169.99
Mishimoto MMTC-DMAX-01SL Transmission Cooler | 2001-2003 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Mishimoto MMTC-DMAX-01SL Transmission Cooler | 2001-2003 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Mishimoto

Mishimoto MMTC-DMAX-01SL Transmission Cooler | 2001-2003 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: MIMMMTC-DMAX-01SL
Price
$498.95
Premier Performance 1.111.1 1/2 inch Allison Transmission Repair Lines | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Premier Performance 1.111.1 1/2 inch Allison Transmission Repair Lines | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Premier Performance

Premier Performance 1.111.1 1/2 inch Allison Transmission Repair Lines | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PRE1.111.1
Price
$325
Premier Performance 1.111.2 5/8 inch Allison Transmission Repair Lines | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
Premier Performance 1.111.2 5/8 inch Allison Transmission Repair Lines | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Premier Performance

Premier Performance 1.111.2 5/8 inch Allison Transmission Repair Lines | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: PRE1.111.2
Price
$350
ATS 303-010-4248 Allison Pressure Regulator Valve | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
ATS 303-010-4248 Allison Pressure Regulator Valve | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

ATS Diesel Performance

ATS 303-010-4248 Allison Pressure Regulator Valve | 2001-2004 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: ATS303-010-4248
Price
$101.49
ATS 314-005-4248 Allison 7/8 in Thread Cooler Line Fitting | 2001-2002 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7
ATS 314-005-4248 Allison 7/8 in Thread Cooler Line Fitting | 2001-2002 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

ATS Diesel Performance

ATS 314-005-4248 Allison 7/8 in Thread Cooler Line Fitting | 2001-2002 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LB7

SKU: ATS314-005-4248
Price
$35
BD Diesel 1030606-5/8 Xtrude Auxiliary Transmission Oil Cooler with Fan Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
BD Diesel 1030606-5/8 Xtrude Auxiliary Transmission Oil Cooler with Fan Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

BD Diesel

BD Diesel 1030606-5/8 Xtrude Auxiliary Transmission Oil Cooler with Fan Kit | 2001-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

SKU: BDD1030606-5/8
Price
$720.95

2001-2004 6.6L Silverado & Sierra 2500HD/3500HD

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