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Duramax First Generation: 2001-2004 (LB7) Discuss the first generation (2001-2004 LB7) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY. is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
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Old 01-12-2010, 10:42 PM   #11 (permalink)
Diesel Boss
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Join Date: Dec 2003
Location: St. Louis Area
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I only tried plugging mine in a couple of times. I really couldn't see much difference. Definitely didn't blow warm air out of the heater when I started it. Never had any start problems. Astrostart button about 5 minutes before I hit the door and runs smooth as silk when I drive off.

2004 Silverado LB7 D/A CC LB DRW 4x4, Firestone Ride-Rites, Air Lift Compressor, Line-X Bed Liner, Retrax Bed Cover, Backup Cam, Pullrite Super 5th Hitch, Rear View Cam
AstroStart 2205A Remote Start (from Max Power)
2004 Keystone Sprinter 282FWRLS 5th Wheel
Trail-Air Pin Box,
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Old 01-14-2010, 01:36 PM   #12 (permalink)
Glow Plug
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Join Date: Apr 2008
Location: Utah
Posts: 210
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Some good info I found

Crankcase Ventilation System Description

The crankcase ventilation system on the 6600 Duramax engine vents the crankcase gases to the atmosphere. Located in both valve rocker arm covers are diaphragms to control the venting of the crankcase gases. As the pressure of the crankcase gases increase they overcome the spring holding the diaphragm in the close position. If a vacuum situation arises in the crankcase the diaphragm closes the port in the valve rocker arm cover. Closing the port will prevent unfiltered air to enter the crankcase.

The crankcase gases travel from the valve rocker arm covers through hoses to the crankcase ventilation system oil separator. The oil separator, separates the oil mist in the crankcase gases. A hose is attached from the bottom of the separator to the crankcase. The oil is returned through the hose to the crankcase.

After the oil mist is separated the crankcase gases are released to the atmosphere through the hose connected to the separator.

No routine maintenance is required to the crankcase ventilation system.

08 CCSB- CTS, 4" Magnaflow, diamond eye down pipe, EGR delete, PVC reroute, PPE airbox mod, Transgo Jr., SuperGlide hitch, Firestone bagsfor now
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Old 01-15-2010, 01:21 PM   #13 (permalink)
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Posts: 69
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That is good info!
Cognito 7-9 W/Deavers
35/12.50R20 Cepek FCII's
4.56 R&P
RDL UpPipes & Manifolds
FASS LP, PPE Hot, Transgo Jr
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Old 01-18-2010, 08:55 PM   #14 (permalink)
Diesel Head
Join Date: Nov 2006
Location: Fort Wayne, IN
Posts: 510
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ya, but they don't work real well. They do ok. But soon i bet will be banned by the EPA. I see these at work everyday and they are old news.
2003 GMC EC 4x4, LB7, Allison - sold
2008 GMC CC 4x4 LMM, Allison
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