Thank you for the info everybody. The 8th digit is a 2 so it's a lly. I did a search on the site for lly injectors and read very briefly about rebuild or replace and something involving an ice pick. Don't know if that's what you're talking about. What's the issue and what needs to be done? I'll get a shop to do it. Approx cost?
Is this something I should look into? Also wondering about Ride Rite airbags/airsprings. And of course there's the question of the choice of which fifth wheel hitch.
Ok. Good. Now we know what to tell you lol. You need to invest into an LBZ turbo inlet manifold (mouth piece or mp for short), or you can buy an aFE mp. The LBZ mp is cheaper but will require cutting your intake to make it fit (some good write ups on that). The afe mp is a drop in replacement.
You also need to block your egr ($10) or you can buy the delete kit ($200+ but looks better under the hood). You will either need to do a finger stick (others can chime in on this) or if you buy a tuner for your truck, you can have the egr shut off. This is needed either way you go though if you don't want to throw a code.
Also get an aftermarket full exhaust to get rid of that converter.
If you do this, you will probably never have an issue, but LLYs have a bad reputation for blowing head gaskets due to overheating so many people will tell you to go ahead and replace the hgs. However, the LB7 has the same hgs and they do not have hg troubles near as often. This is because the stock mp and egr on the LLY help produce more heat on the engine than what the LB7 with no egr would see. So if you take care of these issues then you have taken the driving factors for overheating out of the equation. For peace of mind, you may want to think about new hgs at some point though.
As far as EFI, go for it. There are great tuners who can give you great tunes, and one good thing about the LLY is that it has a vvt, so if you get a tow tune, it will enable the vanes in the turbo housing to close when braking and essentially act as an exhaust brake, which will come in handy when heading down a mountain grade.
Also, since you have a 4x4, look into getting a transfer case pump rub fix kit. It's $75 I think, but will keep you from having to buy a t case housing or a complete t case.
I hope I am not confusing you, but if so, all the guys on here that are smarter than me (a plethora of them on this site) will be more than happy to help you out.
05 GMC LLY crew cab 4x4. aFe intake + mp, catback 4" exhaust, Nicktane Adapter w/CAT filter Exterior:
Billet Grille, LED Cab lights, LED Tails Interior:
Eclipse Nav/DVD head unit complete with backup camera
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