How do I adjust the throttle position sensor in my 2001 Chevy Suburban 8.1L V8?

asked on Reddit too I see
they told you look here

https://www.justanswer.com/chevy/0px7o-1988-chevy-suburban-wondering-oyu.html

or buy the old relic real shop manual GM from
ebay.. its huge paper book, and always best to own
if doing DIY nothing is better...
back then no digital books so..... facts are hard to dig up./

Sounds like it is the throttle position sensor . This tell your computer that you are pushing on the pedal to go faster or slower . You may want to go to UTUBE and put your year and brand of truck in , like this Example : 2001 Chevy Suburban Change out throttle position sensor with 5.7 liter ( This is my truck ) . Hope this helps , Grant

Error Code: P0221
Description:
Throttle Position (TP) Switch/Sensor B
Accelerator Pedal Position (APP) Switch/Sensor B Range/Performance Problem
Possible Cause:
- Accelerator cable adjustment.
- Throttle position (TP) switch/sensor .
- Accelerator pedal position (APP) switch/sensor.
- Check valve clearance, adjust if required.

http://engine-codes.com/p1125_chevrolet.html
According to that website above, its your Accelerator Position Pedal Sensor. If you have already replaced it check your wiring harness.
Here is a website that for your wiring diagram for your 2005 Chevy Suburban.

Sounds like the Knock sensor bolt has been over torqued.

Disconnect the wire connector to the sensor then remove the 2 screws and remove the sensor then put new one on and reset the computer with a code reader or a scan tool or take it to your local autoparts store (advance auto,autozone,ect.) and they can reset it for you at no charge to you.

Oh man that's a tough one. It almost sounds like a bad head, however there is an electronic spark control mounted to the firewall, that could possibly be doing it. If it is fuel injected, check your injectors. Something else to check would be the fuel pressure regulator. I'll have to think more on it, because you have replaced so much. Have you checked for trouble codes? The throttle position sensor can cause some of your symptoms. Hope this helps, but I think you might have a faulty esc control (electronic spark control)

Possibly the throttle position sensor. Easiest way to test is connect a scanner and go to real time data mode. With the key on,press the accelerator slowly and watch the throttle position change on the scanner. If it doesn't register a change when you start opening the throttle, replace the sensor.

Idle Air Control (IAC) Motor OPERATION The IAC motor is mounted to the throttle body and is operated by the engine controller. The throttle body has an air control passage that provides air for the engine at idle (when the throttle plate is closed). The IAC motor pintle protrudes into the air control passage and regulates air flow through it. Based on various sensor inputs, the engine controller adjusts engine idle speed by moving the IAC motor pintle in and out of the air control passage. The IAC motor is positioned when the ignition key is turned to the ON position.


OPERATION Found on V6, V8 and V10 engines, the intake manifold air temperature sensor is a variable, thermister type which reacts to temperature changes. In cold air, its resistance is high. As temperatures increase, its resistance decreases.






Fig. 2: Location of the intake manifold air temperature sensor — V8 engines


The sensor element itself extends into the intake manifold air stream to provide input voltage to the engine controller. This signal is used along with signals from other sensors by the engine controller to determine the fuel injector pulse width.

What is systems pump sounds like some Bs