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04 GTO should be a LS1, but I don't know if it's a typical LS1 PCM

I've never messed with GTO PCM's so no answers there. I would spring for the 3 bar, you never know when you're going to want more, and loss of resolution hasn't caused me any problems yet. My turbo...

Yeah should be the settings to throw the tcc slip DTC... Letting your tcc slip 4900 rpm the clutch will be pretty toasted by the time it throws the code, though i've seen it 5000 on some stock...

I was out tuning my '06 Silverado RCSB black, and ran into a 4th gen SS on 31E near Hendersonville, and we went north on Vietnam Vets Blvd... I noticed you had a HP Tuners decal... You here? :secret:...

I drive a turbo'd 2006 Silverado WT 4.8L non flex fuel. I filled up with e85 last night, with only a few gallons of gasoline left in the tank, I drove for a few minutes to maybe get some of the gas...

Wife got a Liberty CRD... I like the thing alot, and looked into tunes for it, well screw that, I can't stand paying that much for one flash, makes me realize how much I love HPTuners, it's spoiled...

Yes, very good advice... Just last week I had to reinstall my OS and lost everything, lucky I backed up alot including my tunes. I lost some good pictures of my Army adventures, haha. Lucky I still...

You're just mixed up a little.

When you say 14 part air, 4 fuel, it's actually 14.4:1 AFR.

14.4 air to 1 fuel, more air the leaner, the less air richer, when comparing to 14.7

U1000 is just what it says, commo failure, meaning the PCM may not be getting all the info that another control module maybe sending... A few things, can cause it. Grounds, sensors, etc. Sometimes...

That's correct a MAF failure will enable max line pressure if DTC P0101-103 throws, I'm sure you disabled them from throwing a code in Engine Diag> DTC's, since you're SD, they're set not to report?,...