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chem_man

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  1. Go to this website https://www.wholesalegmpartsonline.com/ and choose your options and you will see all the different mirrors for your truck.
  2. FriendlyMan, thanks for the information. I had problems getting the EVAP system to pass the tests as well. Drove with less than half a tank of gas; drove early in the morning, late at night, etc. Finally began looking at the intake air temperature (IAT) and engine coolant temperature (ECT) sensors, and noticed that there was what I considered to be too wide of a difference between the temperatures reported by the two sensors. I would up changing the ECT sensor and bingo! Cold engine temps were much closer and finally, all the emission systems readiness tests passed. Drove to the emissions testing station and finally got a passing test!
  3. First thanks to txab for the link to a great writeup! Now to longanbryant, the P0449 code is telling you there is a problem with the EVAP vent valve. When you replaced the vent valve, did you install the air filter for it in the area on top of the transmission? Attached are a co ies of 2 TSB describing what I am referring to. While one of them is for a P0446 code, it is applicable to a P0449 code especially if the EVAP vent valve gets full of dirt/water. Evap TSB.pdf Evap TSB1.pdf
  4. This is a very common problem and GM released a TSB on it. TSB 04-06-04-055A Dated 03/20/2006. Here is a link to the TSB: http://ww2.justanswer.com/uploads/travist80/2009-04-08_014020_Vent+Valve.pdf In short, the air filter for the EVAP vent valve is upgraded and the air filter for it is moved to a place near the top of the transmission. I replaced mine in 2015 using the Standard Motor Parts kit, part number CP454, and have not had any trouble since. It was about haf the cost of the GM/ACDelco kit.
  5. Have you checked your ignition coil? Perhaps under that load, it might be giving out.
  6. I do not believe GM produced any flex fuel Silverados in 2001. Double check the VIN to verify the model year.
  7. Based on a personal experience, check your fuel pressure regulator for a ruptured diaphragm.
  8. Definitely check your fuel pressure and that your fuel pressure regulator is working properly.
  9. Thanks for letting me know about the 2006 5.3 not being AFM. I assumed it was the OP's truck listed under his name since this sub-forum is for 1999 - 2013 Silverados.
  10. P0172 is a code indicating that one or more of your fuel trims is running rich. P0175 is a code that indicates that the fuel trim for Bank 2 is running rich. So, for some reason, your engine is putting more fuel into Bank 2 than it needs to run properly. You might have a fuel injector that is sticking open, a spark plug that is not firing, etc. Or, it could be something with the AFM system. You need to do some detective work in order to diagnose what is going on. Good Luck!
  11. Cassy, since you are serious about performing maintenance on your 99 Sierra, purchase a Haynes manual. They are invaluable and well worth the money!!
  12. As was posted on another forum, you might want to consider cutting out the rusted sections and using NiCopp line, compression fittings and compression unions to make repairs.
  13. What is bands? Also, did you have a new transmission installed? Did you have one or more new u-joints installed? DId you have both a new transmission and u-joints installed? What exactly is the problem? I am sorry to say this but your post just does not make any sense.
  14. While you are looking for a new pump, look at the corresponding Delphi pumps as well. Delphi is also a major OEM supplier of fuel pumps.
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