Shop new or modify your core.
Buy an all new one piece LBZ or LMM harness and pay securely with PayPal, Pay Later, or a card, or send in your existing LB7, LLY, LBZ, or LMM Duramax harness to be converted to standalone.
All new standalone harness for LMM and LBZ
YouTubeAll new one piece harnesses In stock. Orders ship right away.
For pickup truck engines only. Not for Van, Kodiak or TopKick. Shipping: Insured FedEx Ground, 5–7 days, flat $58.63 per harness. Continental U.S. only; international shipping isn’t offered or supported.
Special order available for Van and Topkick Kodiak C4500. Must contact prior to ordering.[email protected]
- New one piece harness · 2006–2007
All new one piece standalone LBZ harness
Set up for your engine: LBZ MAF · 4 pin alternator
From$1,167.00
- New one piece harness · 2007.5–2010
All new one piece standalone LMM harness
Set up for your engine: LMM MAF · 2 pin alternator
From$1,167.00
Our All New One Piece Standalone LBZ and LMM harnesses are for Closed Course Competition Race Only and are built without emissions circuits. Payment of our invoice is an agreement from the buyer and acknowledges that the products will be used for off-highway closed-course competition use only. Furthermore, the buyer is completely responsible for knowing if the product can be legally used in the jurisdiction where the product is being used, whether on land, water or in the air.
Convert and refresh your existing harness
Send your Duramax harness in. It’s converted (modified – cut down) to standalone and comes back refreshed. Current turnaround is 2 weeks.
$576Standalone conversion of your existing harness
Your LB7, LLY, LBZ or LMM Duramax ECM/TCM harness (engine to chassis, from a pickup truck) is reworked to standalone and comes back refreshed.
Contact us for Van harnesses. Modification of Topkick Kodiak (C4500) not available.
+$500Upper engine harness refresh
- LB7
- LLY
- LBZ
- LMM
Send your upper engine harness with your conversion for a complete refresh. It’s peeled, degreased and inspected, then recovered with high temp tubing and tape.
Applies to standalone harness conversions only. Not available for factory trucks.