tootall4289

Best of luck Kmeleon

No luck, dealer did a reprogram light was out for a week and now is back on. Going back to the dealer tomorrow.

My build date is May 15, 2021

Mine is doing they same thing. They did the reprogram and it stayed off for two weeks and now it is flashing again. Interested to hear your update Kmeleon.

Light is back on and back at the dealer...so much for hoping it was just a bad injector

Any update from GM? Mine is doing the same thing.

posted to wrong thread...deleted

Had a fuel injector out #5. That's fixed and check engine light is out. Still have the vibration while coming to a stop...one problem fixed, one remains

It came on as I was going down a slight incline at about 50 mph. Started flashing and then went out.

SEL light is flashing now...back to the dealer.

Same here, different truck with the L9. Let me know how the Pulsar LT works.

It is not stumbling into gear rather as it downshifts coming to a stop the RPMs go so low it seems like it is going to stall and the engine struggles, it recovers once I come to a complete stop.

Thinking about the same kit for my 21 Denali. Let me know what you think about Joe after the install!

5.3 with the 10 speed

I have tried 93 octane and still have the same problem. I agree its not the gas.