Ok just got a new Tahoe Z71. Fully Loaded. Only has 98 miles. I just filled the truck with 93 octane from BP Amoco. This is the first fill up. Almost 21 gallons.

All of a sudden a minute or two later, the entire truck started vibrating, like rattling, and it choked when pressing the gas and then the dash display said reduced engine power, and then the service engine light went on.

I shut the truck off. That vibrating stopped. The SES light still was on. After about 10 minutes I parked and it went off on the next startup.

I called Onstar did a diag check, some code came up but they didnt know what it was. They said sometimes there is air in the gas tank in fill ups which may cause it, or maybe the gas?

What do you guys think?

Any help would do.

Thank you so much.

 

damn never heard of that, that sucks..

i say spray a 500 dry shot of nitrous and get a new motor.

 

Ok the code was U0107...this is what ONSTAR SAID...maybe that helps.

Anyone know?

Thanx.

 

sometimes the SES light will come on when the gas cap is not on. not sure why it would say "reduce engine power"

 

Ok, supposedly the code means:

"lost communication with throttle actuator control module"

wtf LOL does that mean?

Thanx again guys, dont mean to be a pest.

 

is yours a DTW - drive by wire
I have seen that before
Check the connector at the throttle body
poss unplug - put so dielectric in the connector
was the motor washed and spoo'd on at delivery ??