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485 messages,  Last post on Nov 28, 2009 at 5:30 PM

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#424 of 485 Vibration by jereo May 13, 2008 (5:37 am)
It"s NOT the car----it's the TIRES I too had a vibration on my 99PA. Had the Goodyears removed and replaced with Michelins--------over 35000 miles ago and no problems.
#425 of 485 ABS light on by smallbites May 13, 2008 (1:25 pm)
Maybe one of you great folks can help. ABS light on, code reads left rear. Replaced assembly in left rear, light still on. (was able to return assembly ). Now looking for short in connections. Any idea where wire connects to ABS system, or for that matter, where ABS system is? I havn't crawled around yet and was hoping for a short cut. Thanks
#426 of 485 2003-05 P/A Ultra Info needed by russellburke May 22, 2008 (6:57 am)
All: I am purchasing a 03-05 Park Ave Ultra and would like any comments, concerns current owners have with their Ultra's Any assistance would be greatly appreciated. Thanks
#427 of 485 99 PA Supercharged Noise @ 1100 RPM only w/AC On by bah23 Jun 11, 2008 (5:29 pm)
I have a "bearing sounding" noise when engine is under load (e.g. A/C) at 1,100 - 1,200 rpm only. I've had the A/C compressor replaced and the alternator replaced but still hear the noise (although noise less intense since alternator replaced). So, after about $1,500 worth of repairs, I'm still hearing this noise.   Reputable autoshop (0 complaints on BBB last 3 years) doing work. Took it back after alternator was replaced and had owner and mechanic listen to the noise. All agree noise still present but less intense. Mechanic noticed a brace behind supercharger and alternator was missing and said that probably caused the bearings in the alternator and a/c compressor to fail due to excessive torque and I should have the brace replaced.   Any thoughts on my situation?   Thanks in advance Replies to this message: russellburke (Jun 12, 2008 5:19 am)
#428 of 485 Re: 99 PA Supercharged Noise @ 1100 RPM only w/AC On [bah23] by russellburke Jun 12, 2008 (5:19 am)
Replying to: bah23 (Jun 11, 2008 5:29 pm) Howdy bah23: The Supercharger (SC) coupler is your probable cause for the noise. The fine minds in GM engineering decided to run Eaton SC's on many models for a 40 HP boost. The 97-05's had a redeigned front snout with an oil capacity of 8 oz's compared to the old design (90-96) of 4 oz. Right around 75K miles, the forward gears / coupler will start to chirp and chatter under a minor load. This area of the SC runs extremely hot and the sump oil is the only cooling available inside the SC. The inner gear surfaces start to deteriate, the metallic fillings from the gears immerse / float in the oil, and lubrication properties diminish and the chatter and noise increases. The car will not skip or lose power and it will still move on down the road rather quickly! If the SC oil hasn't been changed out once or twice, during normal maintenance, the noise / chatter from the coupler will increase in tone. GM service manuals don't mention changing the SC oil at 40K or any mileage!! I own a 97 Ultra with 130K and R&R'd the SC back at 115K. The supplier for the SC is here in Edmond OK and is by far a premier overhaul shop for Eaton, Paxton and a bunch of other blowers and turbo's for the OEM and hot rod markets. Check out P S E Superchargers. 758 Enterprise Dr Edmond, OK 73013. (405) 844-2773 ... 900 N Santa Fe Ave Edmond, OK 73003-4337. (405) 341-2900 ..I located them thru a Buick owners web forum. The owner gave me a shop tour and I purchased a rebuilt / replacement unit ($500 with core) and changed it out a few months back. I worked for Buick, AMC / Jeep back in the 70'-80's while in college and still do a lot of my own maintenance keeping the fleet running. Best of luck and keep in touch. RB
#429 of 485 Electrical by gcraig Jun 16, 2008 (3:34 pm)
While wiring a trailer my left running light went out on the car and the trailer, (right afer I fixed a poor ground connection for the left light on the trailer). It worked for a minute then went out along with the back left car light. I replaced the car bulb but still it won't work. I checked the fuses under the hood and they seem fine. Is there another fuse box or something I might be missing here?
#430 of 485 Re: Considering a '99 Ultra [idntnvu] by gcraig Jul 08, 2008 (9:47 am)
Replying to: idntnvu (Jul 01, 2004 11:22 pm) I love my '98 PA but there is a problem with the '97 or '96 thru '99 (?) PA's you need to know about. The intake manifolds are made of a composite (plastic type) material that degrades over time with heat from the exhaust that is recycled through it for emissions control. Mine just stopped running one day and when I had it towed in the dealer wanted over $1000 to fix it. I was told i was lucky that the overflowing coolant from the hole in the intake manifold didn't seize my engine and ruin it altogether which is, as they said, "common" for this year. I found a repair on line for $70 or so - a steel tube arrangement that is epoxy glued into the area where the break occurs. I'm an MRB (repair) engineer on Boeing Aircraft and feel the repair is excellent and used it, but nobody would do it for me because it's not "factory" authorized. Anyway, if I buy another PA from this era I would put in the repair right off the bat before I risked the damage possible from a leak. It took me a while since I'm not really a talented mechanic. I can’t recall where I bought the repair but if you do a few internet searches you should find it. Good luck! Replies to this message: imidazol97 (Jul 08, 2008 11:29 am) gcraig (Jul 09, 2008 5:02 am)
#431 of 485 Buick PA front brakes by gcraig Jul 08, 2008 (9:54 am)
I posted this earlier but it must not have made it 'cause I can't find the post now. Sorry if it's a repeat. I replaced my rotors and brake pads (used high quality ones). Over time vibration is increasing - again. Now its so bad that I'm going to be turning my new rotors to smooth our the ride. Do you think its the calipers ruining the rotors by causing them to overheat? Or, is this a typical design-type error for this vehicle? Or, is it something else? Thanks for any suggestions anyone can give me. Replies to this message: scoobyfndoo (Jul 24, 2008 9:22 am)
#432 of 485 Re: Considering a '99 Ultra [gcraig] by imidazol97 Jul 08, 2008 (11:29 am)
Replying to: gcraig (Jul 08, 2008 9:47 am) The post was from 2004. The company is APN I believe. It's a popular item for the small fraction of cars from 1996 to 1999 that have the EGR tube deteriorate due to the heat going through it. Dorman also makes a replacement manifold with a replacement EGR metal tube that is placed into the lower intake manifold. It has increased air clearance.   Any shop that does repairs would have put in the manifold for you. A GM store probably wouldn't. Replies to this message: gcraig (Jul 09, 2008 5:02 am)
#433 of 485 Re: Considering a '99 Ultra [imidazol97] by gcraig Jul 09, 2008 (5:02 am)
Replying to: imidazol97 (Jul 08, 2008 11:29 am) Oops! I wondered after I sent the post in reply when he had submitted his post! I'm pretty new to this kind of site. Sorry but thanks for the info!

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