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GMC Envoy Denali XL Gas Gauge and Oil Pump Problems



  • Sarah,
    That was a year ago. I will find it and send it to you! Its nice to see people like you working for GM, but for me it is too late! I will never buy another GM product again. Which is sad, because all of our company vehicles were GMC and all of my personal cars were GM products. Tell your superiors to get a grip on what really matters; THE CUSTOMER!
  • After working with the GM District Specialist and taking my vehicle to the GMC dealership as requested. The service Mgr determined my engine in my 2006 Envoy needs to be replaced after suddenly throwing "low oil pressure" message and going from low to normal consistently. They have no idea why and stated they would need to totally disassemble the engine to find out what caused this (at my cost). The District specialist called to tell me GM would not give any assistance with any issues I have with my vehicle do to the fact it has high mileage 114K and that is probably part of the cause in my engine failure, after fuel sending unit died as many of you have experienced as well. I will never buy another GM product. I have a 97 Toyota Avalon with 154K and 01 F150 with 135K that ride like new and other than basic tune-up has been trouble free. Family member has Envoy and had major issues as well. Many of you can probably relate.
  • Well it look's like I'm not alone, my 2007 Envoy dash is starting to look like a Christmas tree. This is one of the strangest vehicles I have ever owned.
    1. the gas guage died, got repaired under warranty thank goodness it was expensive, along with the drivers side window motor.
    2. the left and right - front and rear speakers come and go when they want to
    3. the tire pressure light comes and goes thru out the day year round, tires have correct pressure.
    4. the check engine light comes and goes, my mechanic is confused can't get a code & he's good!
    5. the seatbelt/door bell is loud then soft, then quiet then loud etc...
    6. the dash light at the heat and a/c temp control knobs comes and goes
    7. the stab. track lights have now come on and stay on, the button on the side of the gear shift has no effect. I'm waiting for one of us to get stranded before we can get rid of this piece of junk.
    Now I am not an individual that neglects a vehicle, the Chev car my wife drove before the GMC Envoy had 206,000 miles. My current Chev. Silverodo work truck has 337,000 miles we take care of our cars.
    This Envoy has 75,000 on it now and really started having problems at about 20,000 miles.
    I figure it will cost a chunk of cash just to figure out what all the lights mean and no telling what it will cost to repair. I've got to get the damn lights off the dash so I can sell it. NO MORE GMC'S FOR THIS CONSUMER!
  • I'm sorry that your Envoy has not been a satisfactory vehicle for you, rottielover. Have you already worked with Customer Service to address these issues? We're available to look into your situation further with you and will try to help get this resolved at a dealership.
    GM Customer Service
  • hey rottielover, feel bad for you bro. but you'll get no help from GM on this same as i did'nt. everytime its even moist out my speedo and oil pressure gauge go as far as the enclosure will let them. on your "check engine" light issue, have your mechanic check how fast car is coming up to temprature. thats what mine was, truck was running too cool needed new thermistat, and MAP sensor to clear that up... there is a huge problem with the gauge packages of these trucks, but they wont admit it and do a recall... but just like me they're saying to you "thanks for bailing us out when we were going under"
    SUCKERS we all were.. damn shame too, cuz i really liked my envoy.... i'll be driving a TOYOTA soon as this is done, [which probably wont be too long] good luck on the temp. fix, and with getting help from them..... aint gonna happen......
  • rottielover,
    Do not waste your time with GM. They will talk as if they want to help you and screw you over royally. Unfortunately we bailed these crooks out that manufactured a defective product and knowing there mistake they stopped making the vehicle. It had nothing to do with new models coming out and not wanting those models to clash. I will be a STRONG advocate against anyone that tells me they are going to buy a GM vehicle. I actually had a district NO specialist that have NO knowledge of cars tell me that my engine failed (low oil pressure suddenly is do to the high mileage on my vehicle 114K. I have a 2001 Ford F150 and 1997 Toyota with 132K and 154K and they have NEVER had an issue. I had to change fuel sensor, oil pressure sending unit, camshaft positioner sensor and finally engine needs to be replaced. If anyone knows of any Class action in regards to this model let me know ASAP if anyone is going to go that route you have MANY supporters in this forum!
  • Hi Sarah,

    Since you are following this thread,you might be able to give me direction. I just bought an 06 Envoy Denali with 109 kms on it and am afraid that I have bought a vehicle with the exact problem these people are complaining about. Two days of normal used car maintenance and the a day of low oil pressure and a noisy engine. I changed the oil pressure sensor and the problem continued. Five minutes ago I started the vehicle and there are no noticable problems oil pressure is good annd the noise is gone. No fault codes.
    I imagine that there must be some steps that can be taken now other than puting it back up for sale.
  • my exact issue a couple weeks ago and 3 shops including gmc told me engine must be replaced. One was my uncle a 30 year Chrysler technician manager. Hopefully this is not your fate. I had 114K and GMC says high mileage is partly to blame. Dont look for help from them. Sarah is very helpful with her concern but unfortunately for us she does not make the call.
  • I have a 2006 GMC Envoy; I bought with 46,000 miles on it. I am so aggravated with GMC and their tactics to resolve issues that are clearly their fault for putting faulty pieces and parts into a car and not taking responsibility for their mistake. Every light in my 2006 Envoy goes on and off all the time and honestly I've gotten to the point that I don't pay attention to it anymore! Then we received a letter from GMC stating that they will pay 1/2 for a "faulty fuel level sensor", FAULTY?? I didn't buy a car with FAULTY parts if they are FAULTY it's because you put them in FAULTY, why am I responsible for that or anyone else for that matter..?? To me if you put something FAULTY into a product it's your responsibility to FIX IT not mine!!

    My husband is out of work and we’re trying to make ends meet and I have a car that I'm riding around in a car and I have no idea how much gas I have. I am driving on major highways all the time and my car has died 3 times so far the last being a very dangerous and scary situation. I also have two small kids, if anything happens to me or my family while I'm driving and my car dies in the middle of a highway trust me GM this won't be the last time you hear from me. It's very dangerous driving in a situation like that. I was on a highway with NO SHOULDER and my car died... THANK GOD I found the only SMALL shoulder by an exit ramp I past to swerve over to. Other wise I could have been killed. I was on this little shoulder and was still scared because of all the tractor trailers flying by me...

    Not sure why there has not been a TOTAL RECALL on this because someone is going to get hurt or killed. Why can't the government see this.. They are next on my e-mail list.. GMC Stand by your customers and product and FIX IT... Not for 1/2 for free it's your fault were having this issue!

    If GMC can't take responsibility for the issues their cars are having due to their incompetence I will NEVER and I mean NEVER by another GM Product EVER and make sure no one else I know does either... No wonder why people by foreign cars at least with all the issues everyone else has had I have to respect them for standing up to their name and correcting it. No GMC wants to send a letter in the mail stating they know there is a Faulty piece that was put in the cars and they will fix it but only pay have or only for the part not for the labor? Are you kidding me.... What kind of service is that? We all bought cars in WORKING condition assuming all the parts were legit not faulty or bad!!

    Also GM don't forget who BAILED you out when you were going under.... that's right TAX PAYERS! Is this what we get in return after purchasing your product? We'll I hope you go under again and guess what you will NOT get another bail I can assure you on that. Millions of people are barely trying to make ends meet and half don't have jobs and you want them to pay yet again your screw up... Classic

    I fully agree with "Air Springs & everyone else for that matter"
    If GM cannot stand behind this obvious safety Issues with failed fuel gauges I can't stand behind them anymore!! I’m all for “Buy American” to stand behind my country and keep Americans working. If I do buy American again I can bet it won’t be a GM car…
  • I couldn't agree with you more.... I'll try to find some Class Action Issues and if I find any I'll let you know...
  • Good morning,

    It's difficult to advise some next steps for you at this point. As a dealership will likely charge you a diagnostic fee, I would recommend that if you had considered visiting them to wait until this concern occurs consistently (as you say that right now the oil pressure problem has been resolved ant the engine noise is gone). If you're going to pay a diagnostic fee, I want to make sure that you are able to get some results from the visit instead of them saying that they're unable to diagnose anything.

    For the 2006 model year, the powertrain warranty had not come into effect for GMC vehicles, unfortunately, which I realize is an important factor for many as well.

    I know that this suggestion may not leave you with the most peace of mind as I can tell that you are interested in resolving this before it escalates. I see that you used kilometers as a unit of measure, and am guessing that you are a resident of Canada. Have you worked with GM of Canada before? They can be reached at 800-263-3777, and while like me the representatives on the phone don't have technical expertise they can assist you in the process of working with our dealerships.

    I wish I could do more, but hopefully this has helped in some way,
    GM Customer Service
  • Hi Sarah,
    The problem reoccured within 5 mins of driving time this morning. I'm very reluctant to go to a dealership. In my past experince, the troubleshooting includes too many aspects of a marketing plan.

    I'll have to try research the problem more.

    Thanks for your reply.
  • I am sorry to hear about your situation, cfitzy, and understand that you are frustrated and don't feel safe in your vehicle.

    If we can look into any additional options that may be available, please send us an email with more information (include your name and Edmunds username, phone and address, the last 8 digits of your VIN and current mileage, and the name of your dealership). My coworker Christina, who answers incoming emails, will set up your Service Request and advise you further.

    GM Customer Service
  • I certainly understand and wish you the best as you seek to get this resolved! :)
    GM Customer Service
  • Hi Sarah,

    I'd like to say that I'm sure there are at least a dozen different problems that all appear to be the same when reading all these complaints. My promlem was that the previous owner of my vehicle followed poor maintenance practices and used inferior parts. This "common" problem was not GM's fault.

    As I said in an earlier post, I had just purchased my 06 Envoy Denali, the next day got the "low oil pressure, turn engine off" message and was horrified when I googled if and heard of all the problems.

    I did hours and hours of research and finally decided to do an engine flush (which should not be part of routine maintenance) changed the oil twice that day and installed a premium oil filter. Just in case, I replaced the oil pressure switch and also had the oil pressure tested at the filter to be sure the oil pump was okay. A 1000 miles from now, I'm going to change the oil again and install another premium oil filter to make sure the debris from the engine flush is completely gone.

    If I can offer advice to other people with similar problems, don't trust that the discount oil change people are protecting your investment even if they charge you a lot of money and make you feel that you are doing the right thing. I'm not a fan of dealers but they will at least install the recommenfed part for your vehicle your best bet always, is to have a mechanic that you trust.
  • hey "kpick", sorry to be the bearer of bad news but... my '04 garage kept, low mileage envoy started with oil pressure gauge going to full max on wet days. it now works when it wants, but the speedo is pegged at 130 mph, that used to only happen when wet, but it has not moved in 2 months... i took truck in to GMC dealership, and they say "you need a whole new gauge cluster" about $600. and no, they would'nt even split the parts with me !!! the service writer even said "this is a huge problem with the envoy line, be thankfull its only speedo and oil pressure" thats not working !!! it plain sucks that they wont do a recall.. if any lawyers read this thread, a class action suit would have tons of people to join..... its too bad cuz i always bought american.. no more.
  • Timbo65,
    I am 100% with you. Are there any Attorneys in this forum or does anyone know of any that will look into C/A suit for us? If so let the forum know and he will have a ton of backers.
  • juliusdjuliusd Posts: 2
    Did you ever get your problem fixed? I had a similar problem with my 2003 GMC yukon SLT. I may have a solution for you.
  • moosedb1moosedb1 Posts: 11
    GM said they will offer no assistance and i needed to replace engine at my expense.
  • juliusdjuliusd Posts: 2
    Sorry to hear that! I thought you were dealing with a faulty instrument cluster. i had mine replaced for a fraction of the dealer cost.
  • timbo65timbo65 Posts: 22
    hi moose,
    i have spoken with an attny. about possibly taking on a "class action" suit.
    his office has spent a couple of hrs. with me and online looking into this, and says we have a very good case and cause.. hopefully an attny. comes forward on here with the same frustrating problems, cuz that will surely put him/her in a fighting mood !!!! i will keep you all posted if this firm in Boston will take it on...
  • julien61julien61 Posts: 5
    No I did not and I'm not about to replace the engine!
  • I hate to even think about changing the 4th oil pump in my denali but there it sits on my driveway again with oil pressure reading between 25 psi and zero, with the associated ""stop engine" message on. I know the issues with this car and realize that GMC isn't overly interested in correcting it but I'm looking at what to do. The last three pumps where from GMC dealership I installed the last one 10 months ago myself. Does anyone have an alternate MFG for the oil pump. I dropped pressure after a mildly hard acceleration from 20 to 50 mph. I don't know if the spline drive on the pump slips or if the crank drive tines are worn but the car only has 60k miles on it. Is there a fit issue with putting a cast iron 5.3 liter block into the car instead of the alluminum one in there now?? I burn a little to much oil in my opinion but GMC says that it is within in aceptable tollerances, about 2 qts between oil changes and yes I keep an eye on it. The oil was full in the car at the time of this issue repeat. Any help would be appreciated, PJ
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964
    Hello PJ,

    I'm sorry that the oil pump has been such a problem for you on your Envoy. If you decide to work with a dealership on this repair, please let us know as we would like to be available to assist in any way possible.

    Also, I see you mention that your vehicle is burning oil. I wanted to be sure to let you know that the accepted rate of oil consumption is 0.946 liter (1 qt) in 3200 km (2000 mi). If your rate differs, it may be worthwhile to have your dealership perform an oil consumption evaluation.

    All the best,
    GM Customer Service
  • since last summer, the fuel guage would flip, the 'check engine' light would come on, at certain fuel levels, at first, then around december, never stopped flipping, and the light never went off. i called my nearest gmc dealer, told the problem, informed them i had read HERE that gm paid for all but $150, no hassle, and the svc mgr looked it up, and said 'ok'. i waited a month to see if anyone posted news of a gm recall, paying for all, but did not happen. this is capitaland gmc in glenville, ny. left it for half day, picked it up, now, i don't have to set 'tripB' all the time to keep from running out of gas. mine gets around 14mpg, 25gal tank, so when it hit 300miles, i filled it. now, that aggravation is gone. thanks to you bloggers telling me that it would cost only 150. i looked online, saw a pump/sender was $300, my son and i were going to yank the tank ourseves, killing most of a day and spending more.
  • timbo65timbo65 Posts: 22
    i am dealing with the very popular "instrument cluster failure". how did you go about replacing it at fraction of cost ?? i had it to the dealership, and they offered nothing as a break. not split the parts or labor... the service writer said this is a huge problem with this line. i dont think i should have to foot the whole bill for GM's failure to install a dependable part in the 1st place.. its like they designed these to fail at 3 yrs. old to drum up income on parts and service... i think this girl sarah means well but unless she can authorize some type of reliefe i dont need to be told make an appt. at dealer.. did that..
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964
    It's great to hear that everything has been resolved for you, benbobbidict1! :)

    All the best,
    GM Customer Service
  • gmcustsvcsarahgmcustsvcsarah Posts: 1,964
    Good morning timbo65,

    I see that you have already been to the dealership for this and that you are hesitant to do so again. If you wanted to explore what options may be available through the Customer Assistance Center, what we can do is get the Service Request established, gather necessary information, and evaluate the case (there are many factors that are considered).

    If you wanted to start this process, please email us at with your name and Edmunds username, phone and address, the last 8 digits of your VIN and current mileage, and the name of your involved dealership.

    All the best,
    GM Customer Service
  • First, I love my truck. I absolutely love my Envoy. But, after having the problems I am having with this truck I will never buy another GMC product again and from what I am reading, financially, you can't afford that kind of decision from your existing customers.

    First, my midgate window regulator has been out for over 2 years. Fortunately, it is in the "down" position. Second, my instrument cluster has been going "bonkers" at random with incorrect readings on temperature, speed, and oil pressure. Third, my check engine light is off and on due to a bad oxygen sensor. And finally, last night with a 9 month old on my hip my rear glass got "stuck" in the down position-tail gait would not open-and DIC instructed me to go to the users manual for a Midgate issue (which was not the problem at all). We currently have a tarp draped across my car because we don't want it to rain inside as we cannot get the window up. We have been directed by the manual to take it to the dealer and have no choice at this point as the back glass will not come up and the tail gate will not open. Imagine producing a vehicle WITHOUT a tailgate safety release/reset-shame on GMC.

    My car has less than 90,000 miles on it and it's almost 9 years old. To say the least, it's been well taken care of. I have had the oil changed and kept my reciepts just like I should have because I do love my truck. When I clean my car, I use q-tips and toothbrushes. However, the fondness I have for my truck will NOT outweigh common sense when it comes to making a decision to buy another.

    My issue is now with GMC. I cannot tell you how many posts I have read online concerning a model vehicle that only 12,000 were made describing the EXACT same problems I am having with my Envoy. How many of your customers have to report bad window regulators and bad instrument clusters before you do something about it. One website indicated that I may indeed have to wait on replacement parts because "so many have been ordered that they are on back order now." mean GMC has had such a large number of these regulators ordered that they are now on back order and GMC refuses to issue a recall???

    If you refuse to stand behind the craftmanship and the parts in this American made vehicle, I will never purchase another. Not only will I never purchase another, I will make everyone in my WORLD aware of the problems I am having with this vehicle and GMC's lack of committment to stand behind their vehicles.

    SHAME on GMC. What a way to represent the American automotive industry.
  • rachelnjrachelnj Posts: 2
    If you file a lawsuit please let me know. I have an 05 Envoy and the fuel gauge stopped working about a week ago. I received a letter from GMC stating that there was a recall on it about a year ago and not to take it to the dealer unless you currently had the issue. They are only covering the repair at 50%. It seems to me that if they knew that there was an issue before I did that they should cover it at 100%. I called the dealership and was told the repair would be about $480. That means that I pay $240 out of pocket for their faulty equipment unless it is still under warranty which it is not. How could it be I purchased the car used in 2010 and the warranty expired in 2008. My SUV only has 61,000 miles and yet they refuse to pay. I spoke to GMC customer service and they stated that the issue was only with half of the cars so only half of the costs would be covered which makes no sense. In addition my speedometer is not malfunctioning and according to several sites that I have looked at this is a wide spread issue. There was a recall but not for my model. They need to pay! This could cause accidents and other issues. What would they do if someone stalled out because they didn't know how much fuel were in the car and got into an accident? Or if I am speeding because obviously I don't know how fast I am traveling are they paying for the citations? This is ridiculous. I LOVED my vehicle up until these issues and the way that GMC treats its customers. So basically if you are able to get anywhere with the lawyer please post.
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