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Discussion Starter #1
So, I bought the car used, 06 LS, had around 98k when I bought it. I have no idea if anything has ever been done to this car beyond oil changes. The Transmission seems to function totally fine right now, no issues shifting, and I don't ever really drive around mountains or really hot weather or do heavy pulling or anything else described in the Owners Manuel. i am now sitting at around 106k, what should I do in the name of maintenance? I notice a lot people saying how dangerous Flush's are, even more so on cars with high mileage. Should i just get the fluid changed normally, with gravity? Or is this fluid lifetime? or what? I'm sorry if this is a dumb question, but I know almost nothing about cars and have very little money, so would like some help.
 

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The fluid is considered "lifetime" because it is "sealed"...but 100k is about the change interval. Don't have it flushed - a standard drain and fill would be what you want.
 

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Not a problem. If you have any other questions, feel free to ask!

100k might be a good time to replace the plugs, if they have not been changed. They are iridium plugs, so they are good for about 100k. It'd be worth checking the air filter, as well.
 

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I had the spark plugs changed a few oil changes ago. I also had one of the air filters replaced, not sure which one it was I cannot recall. Should I also change the transmission filter with the fluid? Any special type of fluid i should get for it? Any other fluids I should consider changing? like Coolants? Fuel Filters or something?
 

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There is only one air filter. There's a cabin filter, but that is for the HVAC in the car. The engine air filter is located behind the passenger headlight, in the air box.

I mean, at 106k, you'd probably be okay replacing the filter. I was going to when I had to add a bunch of new fluid (it leaked out when I was replacing my passenger-side halfshaft), but for whatever reason, I decided against it. Sometimes its just best to leave the filter.

Coolant is good for 100k, so I would say drain yours and put some new stuff (Dexcool) in.

Fuel filter wouldn't be bad either, but it probably is perfectly fine. Mine was at ~116k miles when I replaced it.
 

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Discussion Starter #7
So the tranny is sealed you said, does this require anything special to work on? I assume this is one of those things that requires a "special tool" that only Dealerships have?
 

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They just call it a sealed system because it doesn't have the typical dipstick.

No, you won't need anything special, aside from a means of lifting the car while keeping it level (a lift helps here, but you could use four jack stands), and a long funnel.
 

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Discussion Starter #9
Alright, I found in the Manuel I should get DEXRON VI fluid when I change it, but I could not find anywhere exactly how much to get.
 

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Now would be a good time to start shopping for new O2 sensors, shocks, struts, and control arm bushings or whole new lower control arms.
All of this installed at the garage can get a little pricy but the suspension work will transform the handling most noticeable.

The stock ACDelco FE5 shocks & struts are impressive.

And 2qt should be more than enough. YMMV.
BTW, Your cabin filter migh be a great place to grow mushrooms by now if it has never been replaced.
 

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Discussion Starter #11
The structs and shocks have been replaced. I just changed the shocks a few weeks ago and the struts were changed at some point before I bought it. Also yea, the cabin filter was just changed like 2 days ago. It wasn't pretty lol. So 2qts. Alright excellent. Thanks a lot.
 

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My filler has a red cap right up top, just screws off by hand.

 

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Thanks - I just happened to find that on a Google Image search :laugh:
 

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Discussion Starter #16
Alright I have the 2qts of fluid, but wanted to be sure of something first before doing anything. The Manuel said something like "severe service only" in regards to changing the fluid. What exactly does this mean?
 

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Manual* (Manuel is a man's name :laugh:). Sorry, had to correct that (it made me think of a scene in WALL-E).

Severe Service is if you're doing a lot of stop and go/city driving. Where does it specify that?
 

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Discussion Starter #18
Page 6-6 under "Additional Required Services". It says exactly "Change automatic transaxle fluid and filter (severe service only)."and has notes at 50k mile intervals of when to do it?
 

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GM’s definition of severe service is a misnomer. First they will say lifetime no service necessary life expectancy greater than 150,000 miles except for severe service (temp range beyond 60F and 70F) speed not constant, or in excess of 40mph or slower than 35mph.

Now
Your hydro fluid in your transaxle breaks down with temp & time
Your transmissions bearings will love 2-3qts of fresh fluid. And I thought you had a manual transmission or is that Manuel or a book.....your first post was not clear to me. .....jk
 

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Discussion Starter #20
Alright, finally had time to check it. I found the cap way in there and managed to get it open. The fluid was still bright cherry red. So I'm assuming it's been changed already? Either way, I have the fluid now if I need to do this later. thanks for the help everyone.
 
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