Last post on May 24, 2010 at 8:35 AM
You are in the Buick Lucerne
What is this discussion about?
Buick Lucerne, Engine, Sedan
#217 of 240 Re: 2009 Buick Lucerne [ryster]
Feb 06, 2010 (11:35 am)
Ryster, thank you for the encouraging words. The dealer is a very reputable dealer and I had no doubts they would fix the car, if possible. It did put a little scare in me since the car was so new. The oil pan gasket was replaced on 1-22-2010 and I have not seen any more oil, yet anyway. I hope that was just a fluke that is now fixed for many, many years. I still really like this car a lot.
#218 of 240 2009 Bucik Lucerne oil leak
Aug 21, 2010 (11:42 am)
My Lucerne started to have a small leak at about 13,000 miles.Been to dealer three times and the leak is still there.They replaced the harmonic balancer and seal on the first two trips to the dealer.The last time they resealed the seal that did not fix it.I have the 3.9 V-6. I'm open to any help on what to do next.
#219 of 240 Re: 2009 Bucik Lucerne oil leak [staff48]
Aug 23, 2010 (10:18 am)
I apologize that you have had a concern on your vehicle. Because you have been to the dealership 3 times and the concern isn't fixed, I would like to have an agent look at the concern further for you. In order to do that I will need your VIN, current mileage, contact information, dealership and best time to contact you. The agent will require that you take the vehicle in to be diagnosed. You can get my email by clicking on gmcustsvc. Thank you,
Mariah GM Customer Service
#221 of 240 09 Lucerne tranmission question
Aug 25, 2010 (7:47 pm)
My dealer (and GM Customer Service) say that unless the car throws an eror code that they cannot restore the performance of the car. I used to get 29-30 MPG with the cruise on set at 70 MPH and the tachometer showed 1700-1800 RPMS. Now if I set the cruise as above, the tach shows 2600 RPMs and I'm getting 22-24 MPG. No one shows any imagination or troubleshooting skills and in fact I'm fairly sure they think I'm crazy. But I seem to have lost overdrive. Why should I keep a car that can't be repaired ? Going to take the loss and buy a Subaru.
#222 of 240 Re: 09 Lucerne tranmission question [soon2bxgmowner]
Aug 26, 2010 (7:02 am)
It sounds like you would rather sell the car and buy a different one. But I'll suggest a couple of checks that the service manager should have done or had a tech do.
Drive the car at 70 mph. Set the cruise. check rpms. If they are 2600 like you found before, move the shifter to 3 instead of OD or 4 whichever it shows. See if there's a change in the rpms after the torque converter lockup clutch varies its settings and then settles back during the shifting.
If you get 2600 in 3rd, then you know you're not getting overdrive. If it's lower than 2600, try putting your foot on the accelerator to hold the speed and touch the brake pedal lightly to disengage the torque converter lockup in 3rd. IF the speed goes up to 2600, then you know you're not getting any lockup percentage in the 4th gear OD that you were trying to tell the dealer about.
A last test would be to return to OD, and let the car stablize. Then hold the accelerator and touch the brake to see what rpms you get in OD with the torque converter lockup not operating.
I don't know how many dealers are close to you, but I would go to another dealership. Speak to the service tech but ask politely if he/she thinks you should speak to the customer service manager or his designee about a problem that another dealership hasn't checked into the way you would like to have seen. Tell the rep the problem and any results from my little tests, but indicate your concern.
The service writer may know exactly what to do. You're under warranty, I hope. Keep all documentation from the previous dealer. If they didn't print on with your concern about the high rpms and low gas mileage on the page, ask them to print out a copy from the archive. That will let the previous dealer know you are serious about keeping after the fix.
I'm going to test rpms in my leSabre which is geared differently than you Lucerne later today.
#223 of 240 Re: 09 Lucerne tranmission question [imidazol97]
Aug 26, 2010 (1:25 pm)
Thanks very much for the quick, and informative reply. I did as you suggested and there is literally no change in the RPMs when I put the selector in 3rd when the cruise control is set 70. In addition, the car responds somewhat 'jerkily' when I accelerate (mildly) in 4th.
I do not really want to sell the car, I just want the performance back where it was. I was most frustrated by the lack of troubleshooting by both the dealer and the CSR rep I spoke to. What would happen if the component that generates the error messages was defective ? No one seemed to care. I will definitely try another dealer but I feel the selling dealer should be responsible for the warranty work.
Thanks again for your help.
#224 of 240 Re: 09 Lucerne tranmission question [soon2bxgmowner]
Aug 26, 2010 (3:28 pm)
That suggests your trans is not shifting into overdrive.
It could be computer control, a sensor that's got a bad reading that keeps it from shifting into overdrive (I think a cold motor or overheated motor or trans fluid keeps them from shifting into 4th which is a higher load and lower motor speed), a defective solenoid in the trans (I think each solenoid control more than one speed so there should be another area of problem).
In years past the stovepipe that handles the torque for 4th gear would strip on cars with turbo chargers and abusive, hard accelerations. I don't sense either case applies to you nor to me! The stovepipes were hardened in 2002 or 2003 on the THM65E, which I believe is your transmission.
I think any service manager driving it or having his trans guy drive it will know what's the problem immediately.
The other dealer would probably be happy to be paid at the lower warranty rate by GM for the diagnosis and repair. I believe the Buick dealers have much less to do these days: fewer cars needing repairs, people keeping them longer, people buying fewer new cars.
I hope you find a service manager that cares and will do you right.
#225 of 240 Re: 09 Lucerne tranmission question [soon2bxgmowner]
Aug 27, 2010 (7:24 am)
I have an 06 Lucerne with Northstar V8. I just happened to check mine this morning. With the cruise set at exactly 70 mph, my tach was showing 1800 rpm. The instantn mpg readout was between 28-30 mpg depending on the road surface. I think this is pretty good foe a V8. I just wish they would have put in a couple of mor gears. Four speeds are way behind the times.
#226 of 240 Re: 09 Lucerne tranmission question [nace818]
Sep 16, 2010 (6:43 pm)
Just to close the loop, It took some time but the dealer was convinced there was a problem. The transmission was repaired under warranty. The car runs well but I am now a little bit wary.