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Cadillac CTS Engine Problems



  • I was out on another Cadillac forum and I read a posting from a guy who has a 2005 CTS that was burning a couple of quarts every 1000 miles or so. This guy obviously knows something about cars because he made a modification to his PCV vacuum tube (don't ask me to explain what he did), and apparently the engine no longer drinks oil. So that got me looking around again on the web and I went back to the old reliable: technical service bulletins on the CTS. Apparently one was issued in May 2011 that talks about oil consumption. Finally! Right? It mentions only 2006-2008, but I suspect this can apply to all of model years with the 3.6. At least we now have something to wave in the face of the dealership when they say, "Oh, that's normal" or "We don't know where the oil is going". See below.

    Make / Models: Model/Build Years: BUICK / ALLURE SUPER 2009BUICK / LACROSSE SUPER 2009BUICK / RAINIER 2004-2007CADILLAC / CTS 2006-2008CADILLAC / CTS-V 2004-2005CADILLAC / ESCALADE 2003-2011CHEVROLET / AVALANCHE 2003-2010CHEVROLET / AVALANCHE 1500 2011CHEVROLET / COLORADO 2009-2011CHEVROLET / CORVETTE 2003-2007CHEVROLET / EXPRESS 2003-2011CHEVROLET / IMPALA 2006-2009CHEVROLET / MONTE CARLO 2003-2007CHEVROLET / SILVERADO 2003-2011CHEVROLET / SSR 2003-2006CHEVROLET / SUBURBAN 2003-2009CHEVROLET / SUBURBAN 1500 2010-2011CHEVROLET / TAHOE 2003-2011CHEVROLET / TRAILBLAZER 2003-2009GMC / CANYON 2009-2011GMC / ENVOY 2003-2009GMC / SANANA 2010GMC / SAVANA 2003-2011GMC / SIERRA 2003-2011GMC / YUKON 2003-2011HUMMER / H2 2004-2010HUMMER / H3 2008-2010HUMMER / HUMMER H2 2003PONTIAC / G8 2008-2009PONTIAC / GRAND PRIX 2005-2008SAAB / 9-7X 2005-2009Service Bulletin Number: PIP-4492P NHTSA Item Number: 10036464

  • Why is cadillac going to admit this is a crap engine? I dont think so . So can you at least tell me what years will go in my 05 with the least amount of change. I still owe 10k on the crap car. so it has to last till its paid of.
  • lwwlww Posts: 1
    No good news. My 2005 started using 1 qt every 1000 miles at 55k. I had to have the engine replaced at 87k (covered under extended warranty). New transmission at 125k, new cats/oxy sensors at 130k, new radiator at 150k, new coils at 160k. I now have an apparent ecm issue at 168k (car won't start; key won't come out). My 2005 Sierra has a similar litany of problems. After having owned GM products all 38 years of driving, I'm DONE!
  • what do ya think???
  • gmcustsvcgmcustsvc Posts: 4,003

    Could you please email me your VIN and current mileage? I would like to look further into your situation.

    Thank you,
    Caron, GM Customer Service
  • 05 CTS 89k on it. Changed my oil before taking a short weekend trip (appx 962 mi.). Using Mobil 1 full synthetic, still I dont know why, got home from my trip and had to add 2 full quarts to TOUCH the dipstick. Usually between recommended service intervals my car ONLY consumes 2-2.5 quarts of liquid gold. THIS IS RIDICULOUS! This is just as bad as GM's transfer case problems, which they were fully aware of BEFORE they were put into production. Does anyone know of a VERY GOOD Corporate attorney that would be willing to file a class action lawsuit? I have a little moneyb to burn and would sure like to get the ball rolling. NEVER EVER going to purchase a GM product again, and will do anything I can to stop others. Tomorrow the car is going to be parked right in front of Dealer with a giant LEMON on the roof. I will be there telling everybody about GM's "NO RECALL OR TSB, so no problems exist policy.
  • gmcustsvcgmcustsvc Posts: 4,003

    I apologize for the frustrations you have been experiencing with this concern. Have you taken your vehicle into your dealership to have an oil consumption test performed on it? If not, this would be the direction I would recommend towards resolving this concern with your vehicle.

    GM Customer Service
  • I see GM is suggesting you have an oil consumption test done at the dealer. At least GM is doing an oil consumption test now. My service writer just shrugged his shoulders when I suggested the car was consuming oil. While it's good to know some folks may be able to avoid the hell I went through, you gotta know I wish I hadn't had to go through it myself. Oh well.........always blazing a trail here. Somebody has got to walk point.

    I suggest you observe the strategy employed by mrvr2u mentioned earlier in this thread.
  • I have had the same problem with the Cadillac CTS and the oil consumption that I am reading about. My car is 6 years old and has less than 28k miles on it. I have had regular oil changes and now my engine blew. Cadillac doesn't care and I am out alot of money and basically have to trash this car (which is otherwise in mint condition). I will never buy a Cadillac again. I have already contacted an attorney and I am interested in filing a class action suit against Cadillac (GM). Who is on board with me?
  • Using the forums to organize legal action isn't permitted.

    Additionally, class action lawsuits generally take YEARS to resolve, and in the end the consumer often gets a settlement in the form of either 1) fixing the issue (on a vehicle they likely no longer own by that time), or 2) something like a $500 off voucher toward your next Cadillac vehicle purchase.

    Need help navigating? - or send a private message by clicking on my name.

  • Didn't know you can't use these forums for that. Well, I already have an attorney working on it for me. I find it disgusting that Cadillac can get away with this. I wish I had known before it happened (unfortunately I didn't go around googling information about the Cadillac until it happened). If I had known, I would NOT have bought the car off the lease. I would have turned it in and bought a completely different (probably foreign) car.
  • gmcustsvcgmcustsvc Posts: 4,003
    I apologize for your frustrations. Can you email me your VIN and current mileage? Have you had an oil consumption test done on your vehicle? I look forward to your response.
    GM Customer Service
  • I have had Onstar since the day I bought the car. My "remaining oil life" is tracked and I have receipts from every oil change I have had.

    It is too late, my engine already is gone even though my last oil change was in June (1,800 miles ago) and I have 27.5 miles on my car.

    Sorry, but dealing with another GM Customer Service representative is really a waste of my time. It is in an attorney's hand now.
  • Wow, using the word "tricky" to describe what you did is very imaginative. It's called "fraud" where I come from. We all pay for those $3500 tricky fixes.
  • If any one else is having the oil consumption issue read this article , seems the SRX is also having the same consumption issue as the CTS BUT in this case GM confirmed this is normal, when I talk to Cadillac customer service they had no knowledge of any oil consumption issues although my dealer and another dealer were very open about it and said it was quite common with all GM products with the 3.6L engine.
  • jpfjpf Posts: 496
    This engine is also in the GMC Acadia where it's having problems and it's in the Chevy Camaro. For 2012, the Chevy Impala gets it. Looks like GM is dropping all of its OHV V6's (3.5, 3.8, 3.9) for the sake of a modern twim cam V6. I'll take the simplicity and reliability of old tech over modern new tech any day!
  • das654das654 Posts: 3
    Have you found a solution to your problem? My check engine light just came on with the #4 misfire and 300 code. Injector 4 was replaced but it didn't solve the problem. I am ready to get rid of the piece of junk but I'll have to park while it is at least running on 5 cylinders until I find something new. I'm not putting another dime into this piece of crap. Good news is, it isn't burning oil yet but I would guess that's next.
  • gmcustsvcgmcustsvc Posts: 4,003
    I apologize for your concerns. Have you spoke with Customer Assistance? Can you please email me your VIN and current mileage? I look forward to your response.
    GM Customer Service
  • I've been reading everyone's posts about how poor the GM cars are (and especially the Cadillac CTS). As previously written, I have had the same problems and my car has been at the dealer for over 3 weeks now. They are useless and GM is useless (don't even bother sending the GM rep your VIN #, etc.; it's a waste of your time). Just chalk it up to a bad experience and/or sue GM and certainly don't ever buy a GM car again! That's what I am doing. I am in the process of suing GM (Cadillac) and the dealer that sold me the car. In the meantime, I went out and bought a Toyota. Good luck to all with the lousy Cadillac CTS!
  • das654das654 Posts: 3
    Thank you for responding but I am no longer a prior GM purchaser - I just traded the vehicle for a Ford. I have/had $62,000 on the car. I will tell you the issues with the car asside from the few recalls on it. There was a bulletin issued on the grinding noise in the rear. I had it repaired under warranty. All they did was change the oil which lasted for 10,000 miles. I called customer service to notify them of the problem and they said it was out of warranty but if I took it to the dealer for a diagnostic check they would see if they could pay for anything but would not commit to anything until I spend $150 to diagose a problem that we all know what it is. We just keep changing the oil ourselves. Than, my airbag light came on and spent $671 to fix it. Waited for the recall so I could get reimbursed, received the recall form & received reimbursement, than a couple days later the airbag light came on again. My guess is that it wasn't fixed properly the first time but I was told by the dealer they won't pay for it again. My check engine light came on a few weeks ago showing showing the misfire in #4 and I spent $300 to fix that (not at the dealer or it would have probably been triple). This didn't work and was told it could be the ECM which is a $500 part but that may or may not work. Oh and yes, the tires lasted about 30,000 miles so needed to get new tires which should have lasted at least 60,000 or you would hope 40,000. Bottomline, after reviewing all of the forums, etc. it would appear the car is ready to start using oil so we limped it to the Ford dealer, got close to Nothing on trade but at least we didn't spend several thousands of dollars replacing the rear, repairing/replacing the motor, fixing the airbag, oh yes, the driver's side heated seat. Oh and yes, our mechanic called Cadillac regarding the entine problem and they told him they weren't aware of any issues. That's pretty much what I had gotten every time I called. From all the complaints you know darned well there are problems with this vehicle and you do nothing. As you can see I am venting but GM should be ashamed at this quality and no service. Of course, my fault, I didn't buy an extended warranty. Just want to add that I am not an aggressive driver, serviced the vehicle every 3,000 miles, used Mobil 1.
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