[Jonny5]

Hello:
How important is the 90,000 mile check up. Also, what is included in the 100,000 mile check up. Is there a cheaper, better place to go for this than the dealer, or should i only trust the dealer with my caddy. Thanks yo.
Also, do they change the cabin air filter ot the 100,000 mile checkup? Lastly, im running at 12.9-13.2 volts constantly, except at stop, where i run at a 12.4 when my system is bumpin. Could this be a bad bettery, or the alternator itsself. thanks

 

[Trench]

I would imagine it is all dependant on which dealer you are going to. Being as, to the best of my knowledge, these maintance packages that dealers offer are usually something they thew together. Unless it's something like a "Factory scheduled service mantainence" or something along those lines.

 

[Eldyfig]

From what I heard (or read) on these forums, the cabin air filter is a pain to change and basically not worth the trouble.

The best place to get work done on your caddy is your own driveway. There is no one out there that is going to put as much care in your car as you. There is no one that can do the job cheaper either. Plus, it would be a learning experience for you.

The 100,000 mi check up will include getting your plugs changed out. Your transmission fluid life should be expired about this time if it hasn't been done. Has the vehicle been serviced otherwise?

You can have your battery and alternator checked for free at a parts store. Your alternator could being beginning its slow death. Before you take it to get tested, make sure your battery terminals are clean of corrosion and they are tight. What is your battery voltage right before you crank the car over, after sitting all night?

 

[zonie77]

There were some old posts where people put a pretty comprehensive list together. From memory:

Plugs
Plug wires
Coolant change
Trans fluid change
fuel filter

Not too expensive if you do them yourself.

Look in the Cadillac Technical Archive near the top of the page also.

 

[cguthrie]

I believe the most important thing you need to do is to drain the coolant and refill with Dexcool, and add the barsleak tabs in the radiator hose.
Other fun stuff to do in your garage would be to change the belts, easy, and water pump and T-stat, a little more challenging but fairly easy.
There has been some debate about changing plugs wires, etc. and some think it the best and others think that you can just run it until you need to make a change.
My STS has 119K, and I've done the belts, and coolant related stuff, in an effort to protect the car from overheating. It runs like the day I bought it, at 40K, and my only concern now after replacing tie rod ends - also easy, is that I believe the shocks are toast, which can be very expensive to change.
All info to do the above can be found on this site!
Good luck,
CG
99 STS 119K

 

[zonie77]

On the thermostat...stick with the GM part.

 

[91TexasSeville]

Hello:
How important is the 90,000 mile check up. Also, what is included in the 100,000 mile check up. Is there a cheaper, better place to go for this than the dealer, or should i only trust the dealer with my caddy. Thanks yo.
Also, do they change the cabin air filter ot the 100,000 mile checkup? Lastly, im running at 12.9-13.2 volts constantly, except at stop, where i run at a 12.4 when my system is bumpin. Could this be a bad bettery, or the alternator itsself. thanks

Eldyfig gave a good synopsis.

A scheduled maintenance table should be contained within your vehicle documentation. If not, the dealership will be happy to make a copy for you.

Plan on doing most, if not all of the routine yourself. Nobody can please better than you.

 

[Jonny5]

i live in NY and now it is getting to damn cold to work on my car after work....... plus i dont have a garage, just a driveway, so i havce to take it to a service person. Also, when trying to crack my baby over in the morning on a 32 degree day, it hesatates, then starts. i then shut the car off and start it again and it starts fine. My battery voltage before 1st start is 11.5. thats bad i believe. What would be making this hesatation? the battery? thanks

 

[breedmn]

just the cold temps. wait until the below zero temps set it. it might really be to late then. i would get a new battery and if that doesnt solve it, you may need a new alternater.

 

[Eldyfig]

:yeah:

 

[cl1986]

yep, low battery will cause hesitation probrably from the alt trying to compensate.

Another good thing to mention is the guy has a 95 sls, not sure what year dexcool was introduced, but dont put dexcool in after green stuff was in there. I know my 94 had green stuff. Once green, you cant switch back.