GMC Repair: 2001 Chevy Tahoe, chevy tahoe, auto 4x4

Question
My 01 Tahoe 5.3 v8 auto 4x4 has 164000 miles. It has had all normal rutine maintance from day one. Power stering pump is the only break down until now.It started idling poor at start up, hot or cold,I added lucis fuel conditioner to full tank, once it ran through I changed fuel filter.cleaned massair flow & intake. Has been better for about three weeks.Now it will not run at all.

Answer
Hi
There is two things you can do.
Reclean the throttle bore with GM Top Engine Cleaner spray.
Then take it to dealer and have the PCM reprogrammed with current software.
There is updated software to HELP this condition.
I Hope this helps.
Good Luck
PAwl