The LLY (internally called the 8GF1) is a 6.6 L (6599 cc) turbocharged engine which debuted in 2004 in GM trucks. It is a 32-valve design with high-pressure common-rail direct injection and aluminum cylinder heads. Output is 310 hp (231 kW) at 3100 rpm and 605 lb·ft (820 N·m) at just 1800 rpm. The engine was released with a new Garrett turbocharger with a variable geometry vane system. The valve covers were scalloped to allow access to the injectors without having to remove the valve covers, saving significant labor costs if injector replacement became necessary, and preventing leaked fuel from entering the crankcase, causing oil dilution.
The following trucks used the LLY engine:

• 2006 Hummer H1 Alpha

Specifications

• Engine Code: LLY
• Displacement: 6.6L / 403 in³
• Bore x Stroke: 4.06 in (103 mm) x 3.90 in (99 mm)
• Block / Head: Cast gray iron / Cast aluminum
• Aspiration: Turbocharged & Intercooled
• Valvetrain: OHV 4-V
• Compression: 17.5:1
• Injection: Direct; Bosch High Pressure Common-rail
• Power / Torque: 310 hp (231 kW) @ 3,000 rpm / 605 lb·ft (820 N·m) @ 1,800 rpm

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Who do you know if you have an LB7 or an LLY??

Rttoys's Sig:

'05 Chevrolet CC/SB Duramax/Allison

I know that you have an LLY and Danny has an LB7.

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But to answer your question.


8th number of VIN:
F= HO 6.5
S= Emissions motor
1 = LB7
2 = LLY
D = LBZ

NO NO No..... If it need injectors, it's an LB7. If it overheats, it's an LLY


Reeled you in on that one.

Not all LLY's overheat. Mine never did. I also think that you found a cure for yours.

I also never had injector problems on my LB7, however Skipp and other have had plenty.

so whats the question?


i do want to get my hands on the full-time t-case that is on the back of the allision out of those H1 Alpha

malibu795's Sig:

mispeeling wrods in a thraed near u
02 CCLB dmax 2wd
79 chevy malibu 454/t56
75 GMC K25 4x4 305/350/203

That's what they all say.

And yes I have the cure.

i can tell you mine has never over heated and you can see the loads i have pulled

jdugie123's Sig:

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Don't get them started... Tx will break out the OHing voodoo dolls.

dozerboy's Sig:

These views expressed on this post are not my own, but rather randomly generated computer gibberish and in no way should be used to judge the author's IQ or mental health.

I could at anytime...but who cares, it's 3+ years old now. It's a done deal.

That's just cruel.

Johnny Cetane's Sig:

Three Time Survivor Of Excrement Creek

Have you guys ever had to replace the high pressure injector pump?

i have

2500HeavyDuty's Sig:

Its seems like the regulator goes out before the pump.