2001-2005 LB7 / LLY Duramax Upper Coolant Pipe

A hard pipe for the upper hose

This Wehrli pipe takes the place of the factory rubber upper coolant hose on 2001-2005 LB7 / LLY Duramax trucks, in your choice of powder coat color.

In Wehrli's video, Jason Wehrli explains the pipes are made from heavier 14 gauge aluminum, so the T-bolt clamps can be tightened firmly to seal the silicone boots without crushing or denting the pipe. It is a looks upgrade, not a power adder. This one ships without the WCFab badge that Wehrli's other Duramax coolant pipes carry.

It is designed around the factory GM radiator; some aftermarket radiators may not fit.

Who it's for

2001-2005 LB7 / LLY owners finishing off a clean engine bay.

Key specs (per Wehrli)

What's included

• Powder-coated aluminum coolant pipe (choice of colors)
• Silicone boots with T-bolt clamps

Fitment notes

• Fits 2001-2005 Chevrolet Silverado / GMC Sierra 2500 HD and 3500 with the 6.6L LB7 or LLY Duramax.
• Replaces GM part numbers 15792832 and 15198345.

Professional install available at Powertech Diesel, Idaho Falls — call 208-542-7793.