Having an issue with my boost. Got light and 0299 code. Inspected what I could earlier and didn't find any piping holes. Took to dealer last week for ign. switch recall and asked them to check it out. They told me it was a bad turbo and asked if I ran any fuel besides premium and I said no. It has boost but cuts off in about 20 seconds at about 18 lbs. Cycle key off and on and it comes back.
It has some boost when driving normal.
I was going to remove the turbo for inspection but wanted ask if anyone has other ideas.
It does have the GM performance sensor.

 

There was a GM TSB on the '09 SS's relating to a P0299 OBD II trouble code.(If you have an '09, they were the most produced model year)

TSB Number: TB-PIP-4520

NHTSA Number: 10030004

TSB Date: November 1, 2008

Date Added to File: July 22, 2009

Failing Component: Engine And Engine Cooling:Engine:Gasoline:Turbo-Charger
Summary: General motors: tech may encounter a vehicle with a low boost/power condition and/or DTC P0299 and or P0101 setting. This may be the result of a cracked or broken fitting at the turbocharger assembly.

GM PN 10030004

While I'm sure our gang of SS folks will chime in soon, inspection of the turbo and related fittings does sound like a good idea to me.

Keep in mind that a TSB(Technical Service Bulletin), is just that, it's a Service Bulletin for GM techs as a form of a "Heads Up" from the factory.

They in no way constitute a Recall, but they do demonstrate the presence of a known issue which can give a Dealership or GM Zone Representative the ability to conduct warranty repairs under the "Customer Relations & Satisfaction" program.

You might want to contact you Dealer's Service Manager.

 

Does the sensors have the small harness or were they crimped? What is your boost when driving normal, about 5 lbs?

 

I'm interested in this also since my 09 SS has started the same thing. Anyone know where on the turbo the stated fitting is??

 

look at this post.

https://www.chevyhhr.net/forums/ss-s...erboost-25240/

Also look at the waste gate rod to make sure the nuts are still on it. I believe the nipple is on the BOV on the turbo inlet. It is a plastic cover/fitting.

 

Dug up this old picture. There is a vacuum nipple at the lower Tmap sensor and 1 at the turbo bypass valve(BPV). Might be worth checking out your vacuum line connections.

Red goes to the BPV.
Blue to the lower Tmap.
Yellow to the vacuum reservoir.
(the arrows just indicate the direction of vacuum pull)

 

How come your hoses have those cool looking arrows on them and mine don't? Was that an option?

 

Retirement and too much time on my hands + playing with "Paint" on my home PC.

 

I used that diagram a few days ago, firemangeorge - thanks!


I wonder what the verdict was for jomack - he hasn't been on the forum here since 2 days after posting this thread.

 

Unfortunately that is what happens the OP never comes back to say if the issue has been resolved.