Cadillac CTS First Generation Forum - 2003 - 2007 Forum for discussions regarding the Sigma-based Cadillac CTS.
 | Cadillac Forums: 100,000 mile maintenance 
03-20-09, 09:35 AM
|  | Cadillac Owners Member  | | Join Date: Apr 2005 Location: Kansas City | | | 100,000 mile maintenance
My 03 automatic is coming up on the 100,000 mile mark, and I was wondering what maintenance I should be performing. I haven't had any enigine or drivetrain problems so far, but I want to be proactive. |
03-20-09, 09:46 AM
|  | Cadillac Owners Connoisseur Cadillac(s): CTS 03 | | Join Date: Jan 2008 Location: Chicago, IL | | | Re: 100,000 mile maintenance
Timing belt and serpentine belt, Plugs, trans fluid, fuel filter and airfilter. Check the back of the owners manual. |
03-20-09, 10:02 AM
| | Cadillac Owners Member | | Join Date: Apr 2005 Location: Kansas City | | | Re: 100,000 mile maintenance
What about CPS and the thermostat. Wait until they go bad or replace now? Also, what about diff. fluid? |
03-20-09, 12:07 PM
| | Cadillac Owners Member Cadillac(s): 2004 3.6 auto | | Join Date: Feb 2009 Location: Los Angeles county | | | Re: 100,000 mile maintenance
Just my opinion, but I'd replace the diff fluid every 50k miles. No reason to give these rear ends more reason to howl louder than they already do!
You may want to replace your Dexcool or give some thought to replacing it with the green stuff. If you go green, you'll need to do an excellent job of flushing out the Dexcool though. This is a heated topic so others may chime in on the coolant issue. I'm still not sure what I'm going to do in this regard.
Good Luck. |
03-20-09, 03:20 PM
| | Cadillac Owners Connoisseur Cadillac(s): CTS 03 | | Join Date: Jan 2008 Location: Chicago, IL | | | Re: 100,000 mile maintenance
Quote:
Originally Posted by kdsmiller  What about CPS and the thermostat. Wait until they go bad or replace now? Also, what about diff. fluid? | I would wiat till you had the symtoms before replacing parts, especially the t-stat, that's about an 8 hour job. |
03-20-09, 03:27 PM
| | Cadillac Owners Connoisseur Cadillac(s): 06 CTS-V | | Join Date: Mar 2007 Location: tha peg | | | Re: 100,000 mile maintenance
not when he's doing plugs and a timing belt, might as well do it while the engine is apart, if you do the tstat might as well do the temp sensor too. then if your doing timing belt, might as well do the water pump and idler pulleys. serpentine i'd only do it if it needs it. |
03-20-09, 11:08 PM
|  | Cadillac Owners Fanatic Cadillac(s): Blue CTS 2003 5-speed MT | | Join Date: Jun 2005 Location: Montreal Age: 45 | | | Re: 100,000 mile maintenance
Quote:
Originally Posted by Sammy Z I would wiat till you had the symtoms before replacing parts, especially the t-stat, that's about an 8 hour job. | I disagree on the CPS. These things can leave you stranded with a car that won't start and you don't always get any symptoms beforehand. We've had a lot of '03 owners report them failing around 80-100k. I wouldn't take a chance - I'd change it, especially since it is relatively inexpensive repair.
-GT |
03-31-09, 11:26 AM
| | Cadillac Owners Member | | Join Date: Apr 2005 Location: Kansas City | | | Re: 100,000 mile maintenance
About how much can I expect to pay for these repairs? |
03-31-09, 06:11 PM
| | Cadillac Owners Connoisseur Cadillac(s): CTS 03 | | Join Date: Jan 2008 Location: Chicago, IL | | | Re: 100,000 mile maintenance
Timing belt and water pump is $600 - $800. The t-stat, sparkplugs and the CPS you may want to tackle yourself. | | Cadillac Discussion Tools | | | 
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