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I can't thank you enough 5FDP - saving me the time & energy of towing this thing to a shop is so awesome.

Will update this thread in a few days once I've gotten some miles on it. Thanks again.

Alright, got the sensors, installed them, and its a world of difference. Not sure its running right, but it idles and I was able to drive it a few blocks to get some more fuel in the tank. I've...

I ordered 2 new Denso O2 sensors; will have them tomorrow AM and will update then. Thanks again.

But since you mention it, I agree that it?s curious both sensors report the same value. I?m going to take a look at the wiring and maybe run a test with each sensor unplugged to see if they show...

When I got the vehicle it had one upstream sensor that appeared to be operating normally, and one that was dead. I pulled a log with all 4 (before disabling the secondary sensors) and moved a...

Alright, grabbed a pressure gauge and got some results...

Sequence & Rail Pressure:
1. Key On, Engine Off: during prime ~50spig; after prime ~42 psig
2. Start Engine
3. Idle: ~42 psig,...

Copy that, I'll get one on it tomorrow and report back results. Thanks for the quick reply.

Hello all, I'm a novice with HPTuners/tuning and hoping someone might be able to spot an inconsistency that'll get me running.

Vehicle:
- This is a 2003 Suburban L59 (Flex Fuel 5.3) that I...

I've been changing various things and have finally made some progress:

1. Pulled plugs (they were the original 41-985). All were worn, some were black. Replaced with new OE 41-110.

2. Checked...

Hi Everyone - Long time troller; first time poster. Please let me know if there's additional info that would help; I'm very new to tuning...

Background:
-'07 LY6 mated to 5-spd running OE E38...