Tahoe fuel issues - DTC errors please help!

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tahoeZ71-04

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Hi All and thank you in advance for taking your time to look at this thread.

I have a 2004 Tahoe Z71, Flex Fuel 5.3L V8.

I am currently experiencing the following symptoms:

- Vehicle stalls if I press ******* the accelerator.
- If I get the car at about 50 mph (gradually) it jitters once in a while.
- If my tank gauge reaches quarter tank I cannot leave the car without starting for over 24 hrs or it will not start. On the flip side I can put a gallon of gas and drive over 30 miles and not run out of gas.
- Seems that my car tend to stall more often during the day ( i live in the cayman islands, its very hot during the day) heat seems to be a factor.

I have a Hypertech III controller which I use to read the DTC codes but I have not used the controller for anything else other than "set to factory settings" the error codes are as following:


P0171
P0174
P0463


Thank you once again for your time looking at this post. Regards,
 

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