100K Mile Maintenance

[RPB]

I purchased my 2012 Tahoe in 2014 with 33K miles on it and is approaching 100K miles. I want to keep it a loooong time so I an wondering what I should do for preventative maintenance when I reach the 100K milestone? (I.E. trans flush, hoses, plugs wires??) I also noticed for the first time since owning it at 6 months and about 3000 miles on the oil change it used about 3/4 of a quart. Is this normal?? I have always used AC Delco 5W30 Full Synthetic oil and changed it about every 5000-6000 miles.

 

[intheburbs]

I just rolled 200k on my Suburban. I basically did ALL fluids....engine oil, trans flush, transfer case, axles, coolant, power steering...and then serpentine belt, plugs, wires. Hoses are actually still good.

Excessive? Maybe, but she's still all-original and I work her HARD.

 

[Doubeleive]

in addition to the things bill noted, 02 sensors are rated for 100k will they last longer? yes highly likely but I changed all 4 of mine at 100k because I am in this for the long run it was a $200 maintenance item, I have also done and do all fluids annually brake, coolant, power steering, differentials, transfer case, transmission.
suspension could be worn typically the struts will wear out anywhere from 65k+ I did mine at 80k you can get just the shock portion of the front strut's, mine has air-ride and one of the rear shocks had a slow leak so those were also replaced and the air pump.
I would recommend just getting under it with a flashlight and take a look at everything real good, leaks are my pet peeve so I check mine monthly I also check for anything that looks worn like bushings, u-joints, end links, etc. brake calipers can start leaking so always look behind and under each one while under the vehicle.
you may also want to jack up the front so the wheels are off the ground and check the front wheel hubs for play, hold the wheel at 12 & 6 and see if it "wiggles" there should be no play, then check at 9 & 3 there will be a small amount of play due to the steering but it's shouldn't be excessive if it is the steering components may have wear. also spin each wheel and listen for any weird noise if one sounds different form the other that could be a potential sign of wear. I check mine maybe every 3 months or so it's not really a preemptive item when they go they usually start making noise or they will get loose or a ABS light may illuminate, hence the regular inspection.
*one critical part that can fail unexpectedly is the heater hose's where they "T" at the firewall after years of heat/cold the plastic gets weak and they can just snap off or leak out of the clear blue sky I replaced mine with new ones because I have had them fail in the past this was a preemptive replacement just because the dang things can fail at the most inopportune time.

 

[OR VietVet]

What Bill and Wes said about covers it. Usually I lose about 3/4 quart between changes as well on my 2002. I see no problems and no smoke so I am leaving it alone. The money you spend on all this is money in the bank. Like my Dad taught me, "maintenance pays and breakdowns cost". With maintenance you know ahead of time how much you are spending and what is to be done. With repairs, it is a crap shoot.

 

[swathdiver]

I purchased my 2012 Tahoe in 2014 with 33K miles on it and is approaching 100K miles. I want to keep it a loooong time so I an wondering what I should do for preventative maintenance when I reach the 100K milestone? (I.E. trans flush, hoses, plugs wires??) I also noticed for the first time since owning it at 6 months and about 3000 miles on the oil change it used about 3/4 of a quart. Is this normal?? I have always used AC Delco 5W30 Full Synthetic oil and changed it about every 5000-6000 miles.

Don't run your transmission fluid so long next time, half it or a little more. Time to flush the radiator too.

 

[1BADI5]

For the trans service, just a fluid and filter..............do not let the dealer or shop talk you into the power flush service.

1 filter kit and 6qts of DEX6 is it.

 

[BG1988]

I purchased my 2012 Tahoe in 2014 with 33K miles on it and is approaching 100K miles. I want to keep it a loooong time so I an wondering what I should do for preventative maintenance when I reach the 100K milestone? (I.E. trans flush, hoses, plugs wires??) I also noticed for the first time since owning it at 6 months and about 3000 miles on the oil change it used about 3/4 of a quart. Is this normal?? I have always used AC Delco 5W30 Full Synthetic oil and changed it about every 5000-6000 miles.

Oil change
transmission change
differential change(transfer case if applicable )
spark plugs and wires
MAF sensor (these tend to go bad at 100k/10years)
coolant change
Belt
A/C belt (if applicable)
drive shaft bearings & joints inspection
Thermostat replacement.
inspect coolant hoses ( for structural integrity)
DRL,tail light,brake light inspection (replace with LEDs)

 

[swathdiver]

For the trans service, just a fluid and filter..............do not let the dealer or shop talk you into the power flush service.

Why don't you like changing out all the fluid? What kind of machines do a power flush? The old T-Tech and TransFlow machines let the transmission's pump move the fluid. The former I used to use at Jiffy Lube decades ago, the latter is what GM dealerships are equipped with and is SOP in the shop manuals.

 

[OR VietVet]

Why don't you like changing out all the fluid? What kind of machines do a power flush? The old T-Tech and TransFlow machines let the transmission's pump move the fluid. The former I used to use at Jiffy Lube decades ago, the latter is what GM dealerships are equipped with and is SOP in the shop manuals.

Yes, I have used the machines that use the trans pump to move the fluid. I think the big drawback that people think of is the all new fluid being a shock to the clutches and causing problems. Personally I would change all the trans fluid, IMO.

 

[BG1988]

Yes, I have used the machines that use the trans pump to move the fluid. I think the big drawback that people think of is the all new fluid being a shock to the clutches and causing problems. Personally I would change all the trans fluid, IMO.

only if the clutch is all ready burned out so if it's still clean then it's fine..

mine has two filters aux pump Filter and primary Filter..

yeah it cost double the amount 90$

 

[1BADI5]

Why don't you like changing out all the fluid? What kind of machines do a power flush? The old T-Tech and TransFlow machines let the transmission's pump move the fluid. The former I used to use at Jiffy Lube decades ago, the latter is what GM dealerships are equipped with and is SOP in the shop manuals.

I know for fact on the PPV models, which I have it said to drain, new filter and refill.

If you're concerned with the fluid in the converter, you can pull the line off the radiator, start the truck and pump it out that way.

But dealers using a power can blow seals on an older transmission. I have owned GM trucks for about 25 years now.......and never had to replace or rebuild a transmission. On a daily driver if you do the fluid and filter every 30,000 miles and keep it cool; they'll go over 250,000 miles no problem.

I just sold my 99 Yukon with 230,000 miles on it and the only thing I had to rebuild was the transfer case.

 

[swathdiver]

I know for fact on the PPV models, which I have it said to drain, new filter and refill.

If you're concerned with the fluid in the converter, you can pull the line off the radiator, start the truck and pump it out that way.

But dealers using a power can blow seals on an older transmission. I have owned GM trucks for about 25 years now.......and never had to replace or rebuild a transmission. On a daily driver if you do the fluid and filter every 30,000 miles and keep it cool; they'll go over 250,000 miles no problem.

I just sold my 99 Yukon with 230,000 miles on it and the only thing I had to rebuild was the transfer case.

Yes, my owner's manual says to change it the traditional way but the shop manuals the other way, DIY versus the shop I guess.

 

[RPB]

Thanks much for the replies! Extremely helpful. I have heard both sides of the argument with the trans service. When I first bought the Tahoe it was GM Certified so I was taking it to the local Chevy dealer and the guy there suggested I do the fluid and filter at 60K and the flush at 100K. I always ask others for their thoughts on this because it is great to hear why and how other people take care of their transmissions. I had a 1996 Yukon Sierra GT (Ugh I miss that truck) that I bought used with about 50K mikes and did changes of just dropping the pan every 40-50K mikes. Had it for 18 years and got almost 230K out of the trans before it started to throw a code that it was stating to fail. My father-in-law who does not believe in maintenance had a 2002 Bonneville with about 125K miles on it and had never serviced the trans. I was driving it on vacation when it stated to slip pretty bad and thought for sure it was toast. We limped into a GM dealer and they did the power flush (or whatever the term is for it) and it corrected the problem. Until then I was never much of a believer. He had to have it done another times between then and 180K when it acted up again and then he sold the car.

 

[1BADI5]

Now my "recommendations" coming from being a part time tech not a mechanic and owner of GM trucks for over 25 years. Take that for what its worth.........if cyber security did not pay more then being a tech........I'd be full time

 

[dougo]

Just a thought on trans fluid I put a drain plug in the pan years ago to make draining easier this year i decided to use a vacuum pump to suck it out dip stick lets just say this is the way to go if you are not changing the filter no mess, i watch the parts stores and when trans fluid goes on sale i grab it. my how tows a lot so i do a drain and refill every year. and filter every few years.
Diff fluid i use royal purple every 50 k stopped using gm fluid after having to replace bearings.
The heating hose TEE fitting defiantly change My radiator guy advised me to never let dex cool go more then 50K

 

[LittleFish]

RPB, I have a 2007 5.3 LT that was using about 3 qts between 5K mile oil changes. I took the Tahoe to a mechanic with a laptop to program the engine module. He turned off the AFM (v4 to v8 mode) by setting the temp of the AFM point to turn on to above 390 degrees. Have been running in V8 mode since then. Mileage is still 16 MPG to 18 MPG depending on trip length. Oil usage has dropped to 1/2 quart between 5K miles now. Total cost to have it programmed was $125. I would recommend this for a AFM engines. Just my personal point of view.

 

[jcsswix]

RPB, I have a 2007 5.3 LT that was using about 3 qts between 5K mile oil changes. I took the Tahoe to a mechanic with a laptop to program the engine module. He turned off the AFM (v4 to v8 mode) by setting the temp of the AFM point to turn on to above 390 degrees. Have been running in V8 mode since then. Mileage is still 16 MPG to 18 MPG depending on trip length. Oil usage has dropped to 1/2 quart between 5K miles now. Total cost to have it programmed was $125. I would recommend this for a AFM engines. Just my personal point of view.

You can also do this with devices like the Hypertech tuner or DiabloSport inTune tuner. These allow you to make many other changes, and give you the ability to turn your programming back to stock if needed. Best thing I ever did is turn off the AFM.

 

[steve45]

At 100K, it's probably time to change the oil...

I've changed spark plugs at 200K, but saw no change, and they weren't worn significantly. If anything, I'd change hoses at 200K.

I never change transmission fluid. If anything, suck the fluid out and change the filter, then refill with the same fluid. New fluid can cause seals to leak.

I've had transmissions fail, but NEVER due to fluid. Always a mechanical failure.

 

[Phibbs87]

Now my "recommendations" coming from being a part time tech not a mechanic and owner of GM trucks for over 25 years. Take that for what its worth.........if cyber security did not pay more then being a tech........I'd be full time

Truth about the cyber security realm lol

Sent from my iPhone using Tapatalk

 

[kentman]

power steering

There is no power steering fluid. I asked the dealer to do that one a while back when I was doing a recall, and they honestly informed me that it is electric. That was news to me. I like having no power steering fluid.