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I just swapped from a 4L60 to an 80e, in a 2003 RCSB 5.3 Silverado with 12593058 OS.

I searched, and tried to look in the repository, but I can't seem to find anything. Any help would be...

That was the very first thing that I tried. Nothing.

I've read about this happening, but the guy that posted it never really got his question answered. See attached. Hopefully it's something stupid/simple, and I'm dumb as hell. Thanks

Bump for help.

I put a turbo on my truck this weekend, and I'm finishing everything up. I've done all of this before as I have a turbo C5 that I built/tuned. I added pins to 47, and 55 on the blue (C1) connector...

MAF DTC's were the problem. HFS I would've never thought that in a 2 bar SD OS you would need to fail the MAF. Plus, I thought that since the fail frequency was zero everything would be alright. The...

Sorry about that. I typed all of this up, and it didn't post, so when I posted it again I forgot to post my setup.

2002 C5 T56 3.42's
Stock bottom/displacement LS1
LS6 intake
Ported 241's ...

I had my car tuned by a reputable local tuner who shall remain unnamed. I told him I wanted it to be fairly safe, and this is what I got. 12.8:1 at cruise, and 10:1 at WOT. That's when I bought HP...

2002 C5 T56 3.42 Rear
Stock bottom LS
Ported 241s
TSP 233/239 .598/.603 112*LSA
Rear mount 76/65 on 7lb spring
Siemens deka 80# injectors
2 bar OS


Okay, I had my car tuned by a reputable...