2011 GMC Sierra 5.3 - Truck Norris Tuning

[Kenny2000]

Hi,

New to tuning. I was hoping to get some tuning help on my 2011 GMC, its a 5.3 with a Truck Norris cam, long tube headers and a Fast LSXRT intake.

- on start up it seems to overshoot to ~2k rpm
- any time the throttle is blipped it wants to die when returning to idle

If anyone has any input it would be greatly appreciated!
Tune and log file are attached.

[ricmin]

I was hoping someone would reply to this as I have the same cam. 08 H3 Hummer with a 2019 6.0, with Truck Norris Cam. E67 pcm. Your scan looks exactly like mine. I can get the SD/Maff tune good, it's the Idle that is kicking my ass. I used this thread and it did NOT work for me. It's like it doesn't respond to timing and every time you adjust, the AF ratio goes to hell. https://forum.hptuners.com/showthrea...&highlight=e67

[TragicMike]

Same cam here.
07 5.3 alum block LC9

Mine doesn't want to fire at all. I think it's a timing issue but may be Airflow. I just came to compare.

Can you share a file @ricmin?

I'm a newbie too, but I feel like I have a handle on adjustments. Did not expect trouble with initial startup.

P.S. Sure wish I could just turn the distributor.