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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15201
Experience:  GM Grand Master Technician 2007. 14 years experience.
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A sensor (?) on a 1999 chevy tahoe 350 5.7L that is yellow

Customer Question

a sensor (?) on a 1999 chevy tahoe 350 5.7L that is yellow with green o-rings is unable to locate (under the hood)
JA: Which particular sensor are you asking about? And have any trouble codes been triggered?
Customer: No codes have been checked....
JA: Are you fixing your Tahoe yourself? What have you tried so far?
Customer: yes
JA: Anything else you want the mechanic to know before I connect you?
Customer: I cleaned the sensor once and it day it wouldn't start
Submitted: 1 year ago.
Category: Chevy
Expert:  kalamykid replied 1 year ago.

Please tell me more about your problem. I need to know more about the sensor you are trying to locate, what the truck has been doing as well as every thing you have done to this point please.

Customer: replied 1 year ago.
Truck won't start. Turns over tho. I cleaned a sensor (yellow with green o-rings) and truck started right up. Drove it for the day, the next morning truck would not start....can NOT locate the sensor again..... memory problems.
Expert:  kalamykid replied 1 year ago.

Are you talking about the idle air control valve? It would be gold or silver with a green oring and is mounted into the side of the throttle body.

Expert:  kalamykid replied 1 year ago.

Do you remember if it was on top of the engine or under the truck on the lower front of the engine?

Customer: replied 1 year ago.
It could have been gold and by the throttle body.....
Customer: replied 1 year ago.
it has a connector and pulls right's not bolted or fastened to any engine part.
Expert:  kalamykid replied 1 year ago.

can you send me a couple of pics of the engine bay please?

Customer: replied 1 year ago.
pics to where...??
Expert:  kalamykid replied 1 year ago.

Do you have the pics? I can send you a link that will show you how to upload them.