I have a 2007 Chevy Tahoe that runs fair. The problem I am having is having to put oil in my truck every week and that i have to change spark plug in it once a month. This is getting aggravating. Does anybody have any suggestions as to what is going on with this truck? I have had it for a little over a year and never had this problem til now. What else could be done to stop this problem? When I first bought the truck I had to have it put in the shop for multiple problems. I thought it was going to be an awesome truck. Please someone help me figure this situation out. If you had this problem with your vehicle and got it fixed, please contact me through my e-mail at debrapoore18@gmail.com Thanks.

I bought this truck because I've always driven Chevy. I've driven Suburbans up until I bought this thing. It looks nice, but since month 1, I've been having to add oil just about every 1000 miles. At first I thought it was because the dealer failed to top it off correctly, so I took it back and they did. But then, it happened again...and again. You get the idea. Had it checked out and there was nothing leaking or to be repaired so I keep driving. Still topping off every 1k miles or so. I just keep 3-4 quarts in my truck at all times. NEVER had this issue with my Suburbans. Chevy definitely needs to do something about this. Oh, and now I get the random check engine light...fabulous!

Another complaint about the 2007 Chevy Tahoe excessive oil consumption issue. I took it in to an auto shop who told me they could 'fix" it and charged me $800-$1000. They said it was a "known issue" but was not a recall. The issue continues and I'm out the cost! Plus I have to put 1-2 quarts in every 1500-2000 miles. I can't afford to purchase another vehicle at this time, so I'm stuck with the Tahoe and buying oil every couple of months or however long it takes for me to have to add oil again! I'll never buy another Chevy.

This is without a doubt the dumbest thing I have ever heard of with a vehicle and GM says "it's normal". No oil hits the ground, no smoke, it just getting burned up in the cylinders ( so completely that it doesn't smoke ). The ritual of having to top off the oil every 1000 miles give or take is terrible, especially when its synthetic oil. To make things worse we were told its normal which is a load. Vehicles do not consume anywhere close to this much oil unless there is something very wrong. A class action law suit should be started.

This truck has been a real pain after 80,000 miles. First the oil consumption is so bad we don't change the oil, it just gets topped off. The oil pressure sensor has gone out twice while on vacation and now it wouldn't start except the battery is good and the starter seems fine. Turn the key and the seat belt light dings and the lights and stereo come on but turn the key to start and nothing. The truck was jump started and it was fine. The battery passes a load test and it turns over just fine now.

Over the past year, we noticed that we were beginning to have to change the oil more frequently. We took it to the dealer and they were unable to verify a leak or provide an explanation for the issue. We have not seen evidence of any oil leak while the vehicle is parked or anywhere else. My wife probably drives the vehicle 1000 miles per month. Last week, the light came on indicating that it was time for an oil change after having the oil changed maybe a month ago. I checked the oil and it indicated that it was probably two quarts low. I checked it three additional times and no oil appeared on the stick. The oil is going somewhere and nobody can tell us anything. We are now faced with getting rid of the vehicle or trying to repair it. This is the 2nd Tahoe that has done this to us. We owned a 2003 and the problem started before it reached 100k miles, Obviously, there is an issue with these vehicles and GM is aware of it but won't admit it or offer a solution.I will never purchase another GM product and will certainly tell anyone who will listen not to purchase one either.Very upset that GM doesn't stand behind their vehicles and they wonder why people are buying foreign vehicles.

Bought this Tahoe used in 2013 and found out about this OIL CONSUMPTION problem after the low oil light came on a few times to my surprise. Did some research and saw the complaints and just like others have said, the Dealer Service Manager told me this is not a problem but according to Chevrolet your supposed to add a quart after every 1000 miles. I told him I never had to do that on my previous vehicles and he said that BMW & Mercedes all have this issue.....LOL

O well, anyone want to buy it?

My 2007 Chevy Tahoe burns an excessive amount of engine oil. I have to add a quart about every 800-1000 miles. Two of my friends have the exact same vehicle and have experienced the same problem. One of them recommended this website to me after having his engine repaired at the cost of GM.

After significant research on the web, it appears that this is a very common problem and is clearly the fault of the manufacturer. I use this vehicle daily and often use it for long trips with my family. I worry that something could happen to the vehicle while we are in the middle of nowhere. Any help towards getting this repaired would be greatly appreciated. Thank you.

• Our Tahoe engine consumed motor oil even when new … roughly 1 quart per 3000 miles.

• In 2012 with about 70,000 miles, the increase in motor oil consumption became obvious. Occasional malfunction of StabiliTrak was first noticed with “clunks” in the drive train.

• In May 2013 with 81,000 miles, I started monitoring the oil consumption. The rate was 1 quart per 1400 miles at that time. Intermittent malfunction of StabiliTrak increased in frequency.

• In November 2014 with 98,000 miles, I learned (for the first time) that the 5.3 L engine had an oil consumption problem and I reported my problem to the local Chevrolet dealer. The specification was no more than1 quart per 2000 miles. Our Tahoe was using 1 quart per 1200 miles at that time. Tahoe out of warranty, no help. A Tahoe technician/mechanic at the Chevrolet dealership stated the problem was inherent to the Active Fuel Management (AFM) system design. When 4 of the cylinders are OFF, the intake valves remain closed during the intake piston stroke and this pulls a vacuum in the cylinders that sucks a little oil by the rings. He said there were a couple of fixes proposed by General Motors (GM) but he was not going to make the changes to his personal Tahoe engine. He said the only useful fix was to replace pistons and rings at roughly $4000. He said he intended to just add oil as needed and that he expected his engine to last a long time. I agreed I could buy a lot of oil for the cost of replacing the pistons and rings and left the dealership thinking the engine would last.

• During the winter of 2014-2015, Auto 4WD (auto shifting between 2WD and 4WD as traction varies) became intermittently inoperable … lots of clunking and grabbing especially in turns at very low speed. I quit using it.

• During the summer of 2015, StabiliTrak began to malfunction more frequently but was still too intermittent to have the problem diagnosed. Dash display lights and service messages appeared.

• On September 10, 2015 with 106,000 miles, the StabiliTrak problem became constant and serious. The StabiliTrak lights and messages were present. But now the service engine light was also ON and the engine was running rough at low speed. Transmission shifts between first and second gears were with a jerk and clunk. I took the Tahoe to the dealer and the service manager drove it and witnessed all the problems. I made an appointment to have the dealer diagnose the problems. My oil consumption was now 1 quart per 1000 miles.

• That night, I found an interesting discussion at a web site called ChevroletForum.com … a site where owners discuss likes and dislikes. I was amazed to find a person who had experienced the same sequence of Tahoe problems … the recommended solution: replace the #7 spark plug. Next day I replaced the #7 spark plug and, sure enough, all prior symptoms disappeared. My Tahoe ran smooth with no warning lights and messages.

• I spent the next two days (September 12th and 13th) at my computer researching the Active Fuel Management (AFM) system … how it works and the problems it has caused (and is still causing). Now I know that a lot of web information is just someone’s erroneous opinion. But when I found the same information time after time at both owner’s forums and mechanic’s forums, a degree of confidence emerged. The following is a discussion of what I think I learned from the internet research.

-- GM implemented AFM in 2007 to meet average fuel mileage requirements across the entire fleet. GM must continue to use the AFM system to maintain fleet economy … even though AFM is a flawed design. 2015 Tahoes still use the AFM system. -- Excessive motor oil consumption is an inherent part of the AFM system. GM apparently did not anticipate the appearance of significant engine problems that are associated with the oil usage. -- GM published a Technical Service Bulletin for the 5.3 L engine with AFM (the bulletin number may be 10-06-01-008M, dated November 2014). GM acknowledged the piston ring and spark plug fouling problems in this repair bulletin. The bulletin states that if oil usage continues to be greater than 1 quart per 2000 miles, the pistons and rings must be replaced. This bulletin also discussed the Positive Crankcase Ventilation (PCV) problem that is apparently associated with the AFM system. -- The web research revealed two problem categories. (These categories are also presented and discussed in the above GM bulletin.) When motor oil is vaccumed past the piston rings in the AFM disabled cylinders, the ring grooves become fouled, which allows more oil to pass. As fouling increases with miles, more oil is used and more fouling occurs. Eventually the pistons and rings must be replaced. The PCV system recirculates crankcase fumes through the cylinders for re-burning. The fumes go into the #1 and/or #7 cylinders and foul the sparkplugs and cause the plugs to misfire. The Electronic Control Unit (computer) senses the misfire and sends out anomalous signals, which cause the StabiliTrak system to do strange things and cause the transmission to shift erratically (some reports say violently). The two problem categories (fouled rings and fouled sparkplugs) are interrelated. Apparently the optimum valve timing for the AFM system may not be optimum for the PCV system. -- There are two procedures recommended by GM to mitigate the two problem categories. The piston rings are cleaned by introducing a fluid through the spark plug holes into the cylinders. Apparently no one knows how long to let the rings soak in the cleaning fluid (although GM says 2.5 to 3 hours in the bulletin but cautions about exceeding the 3 hour limit). If the soak is too short, the cleaning is ineffective. If the soak is too long, the fluid etches the cylinder walls. This is a blind procedure with no way to check the results. In any case it seems to be a moot point since, at best, the fluid only contacts and cleans the top piston ring. The other two un-cleaned rings pass oil to the top ring and it quickly fouls again. There is a companion mechanical modification that replaces the AFM relief valve (located in the crankcase and attached to the oil pan) with one that has a splash shield. This modification might provide mitigation in a new engine where the ring grooves are not fouled but mechanics do not consider this to be a credible fix for used engines. In the Technical Service Bulletin referenced above, GM states that 5.3 L engines with cast-iron blocks are less susceptible to AFM oil spray and implies that installation of the new splash-shielded relief valve it is not necessary. [The local dealer says our Tahoe has a cast-iron block but we definitely have excessive oil consumption.] GM also recommends a mechanical modification that replaces the left valve cover with a modified cover that has a relocated PCV drain hole. This modified valve cover may mitigate fouling of new (replaced) spark plugs but mechanics ask what about the fouled piston rings in the #1 and #7 cylinders? -- Mechanics believe that oil consumption within the GM specification rate of 1 quart per 2000 miles will foul the piston rings and eventually require replacement of the pistons and rings. Piston and piston ring replacement is, in effect, a re-build of the engine. Re-built engines are often called re-manufactured engines.

• GM admits that a large (but unspecified) number of these 5.3 L V8 engines have failed. It is unreported if such failures have occurred at speed. GM should recall and replace these engines at no cost ... it is economically unfair to the owners and engine failure could be a safety issue in certain situations.

Purchased my 2007 Chevy Tahoe brand new and around 90,000 mile began to notice excessive oil consumption. It’s not leaking on the ground or visibly burning out the tail pipe. Took it to the Chevy dealer and was told the engine needed to be rebuilt at my cost. Later found out that Chevy new about the engine problem and has failed to fix the issue. My vehicle is approaching 200,000 in excellent condition, but I have to buy cases of oil putting in a quart a week. Need an attorney to file a class action suit against Chevy.

I also have been getting cuts on my fingers as a result of the poor design on the interior door handles. They are currently covered in duct tape to prevent further injuries.

Bought Tahoe used in Dec of 14. Since the weather has gotten warmer we go to the lake every weekend 250 miles round trip. Two trips = 1quart of oil insane!!! I have had very many personal autos 40/50 and have never had one burn oil. Some of them were real POS, but not oil burners.

The Tahoe is supposed to be a luxury vehicle and it really looks nice with a jug of oil in the rear floorboard! Unacceptable problem. I bought new Chevys every year since 2001. This is the first I've bought used since I' m at retirement age I couldn't justify 80k for a new one. We travel every weekend in this vehicle, and now I don't trust it to perform as it should I'm sure with 132k on it now the dealer will do nothing. So sad GM ending up this way.

I have a 2007 Tahoe that I bought back in October of 2010 with 54000 miles on it. In November of 2014 I notice that the oil was a quart low when I went to change it. This all started after the vehicle got over 100000 miles on it. Every 1500 to 2000 miles I have to add oil to it.

I checked the forums and found that there is a known piston ring problem with the 2007 Tahoe that GM knows about but won't fix. I have also heard that some dealers want to charge over $3000 to fix it. I feel GM needs to step up and fix this problem because it is a result of a poor design. I have worked in the electronic controls engineering trade for almost 15 years now and whenever we see something that is a bad design the first thing we do is try to correct it ASAP.

Something needs to be done about this. I had a 2003 Yukon before I bought this Tahoe and I put over 120000 miles on it and it never used a drop of oil. New car designs are supposed to improve things not regress them.