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ya I was wondering about that, I figured I would go by the dealer parts department and give them the vin and see what it has exactly. I only read a little bit on them having changed something and it wasn't a standard 10 bolt anymore.
the ported throttle body is supposed to give the L83 better throttle response, I'm reading a lot of complaints about the poor response and dead spot on these L83, with the catback that was already on the truck it needs something on wot I get a backfire and funky shift not sure where it happens (gear wise) I will have to watch the tac and see what rpm it's very consistent I can make it do it every time, and it does seem to have a low rpm dead spot, I also notice it downshifting when decelerating almost like it was a stick shift but it's a fairly soft downshift it's not banging gears but I can hear it and feel it a little that is also a complaint that some have mentioned on these trucks.
You just need to tune it, then go from there. I wouldn’t do any performance mods until you do that, and remove that stupid V4 mode. Spend your money on a used Autocal so you can retune it at will.
This truck does have some funky throttle response though, the yukon doesn't do what this truck does, it's like it can't decide what it wants to do and then the v4 mode doesn't help either.
I have the autocal I just need to log it and pay for the tune but I didn't want to do it until I had the cai installed and whatever else I was going to do, I figure a smidge more air couldn't hurt. Hell I might end up slapping a 6.2 in this thing if I get a hair up my ass, lol I'm used to the power the yukon hasYou just need to tune it, then go from there. I wouldn’t do any performance mods until you do that, and remove that stupid V4 mode. Spend your money on a used Autocal so you can retune it at will.
You just need to tune it, then go from there. I wouldn’t do any performance mods until you do that, and remove that stupid V4 mode. Spend your money on a used Autocal so you can retune it at will.
F that, put a blower on it. Cheaper and you can do it in a weekend.
Liking the new signature. Two very nice rides you have there.
Thanks!, I want to make a better one, it's just logistics lolLiking the new signature. Two very nice rides you have there.
nice! see much difference?
I only got to drive it a couple miles after putting it on but yes she'll go balls out gear to gear if I put my foot in it, shifts are a bit firmer, get some nice response when just cruising and touch the pedal, took off the parked rev limiter, took off the speed limiter, no more v4 mode. too much holiday traffic right now to really play with it, but I'm not getting the backfire I was getting and it's not jumping from 2nd to 5th or whatever it was landing in so that's an improvement for sure, I asked for them to turn off the shutters in the grill and leave them open I can't see them so I don't know if that was done or not they never said they couldn't do it so i'm assuming it was done, trans still hit 187 I have the tru-cool sitting here to put on yet, probably get to it this week, waiting on the B&M transmission pan back ordered probably past Christmas, the one I bought for the yukon took 3 months to get.
