Not all of the 05 and 06s were electric power steering! My 06 GTP is Hydrollic with electric power assist. Power steering fluid is not in my reccomended service intervals either. Some manufactures, mostly european and japanese, reccomend servicing every 30k. The fluid is hyperscopic like brake fluid and will absorb moisture in the system, but can only do this for so long and then becomes corosive and eats away at the seals in your pump and rack. Not a bad service if the price is right.:doh: That's because the 05s and 06 have electric power steering, not hydrolic (I know I can't spell), therefore no power steering fluid. If he suggested it, he's full of shit.
My suggestions, Transmission flush (GM's trannies are usually the first to fail and can't hurt to be careful)
Coolant Flush if it hasn't been done yet...Dextron fluid lasts only 2-3 years truefully because it's garbage
Other than that, get some synthetic and start running 7,000+ miles before oil changes
That's all I can think of right now
I have a 2006 GTP and I have regular hydro power assist. My pump started this weird growling noise. They have a TSB for this. It's said to put a mighty vac over the cap hole on the reservoir and vacuum down to 20 in. and run the wheels back and forth with the cars front end up in the air.
