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99 STS 2002 STS
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110 Posts
Discussion Starter #1
Hello Folks,
02 STS Got my 100k service coming up. Is their a Official list of items to replace and items to check.
Also would anyone have additional recomendtions?

Thank you all in advance
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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71,130 Posts
The 2002 STS Owner's manual gives, as 100,000 mile service:

Change spark plugs (ACDelco #41-987 Platinum)
Change transaxle fluid - IF the car is used in severe service (taxi) or dusty or towing conditions.

That's it. Check the two serpentine belts, keep up on your oil/filter changes (7.5 qt. total, no more), and drive. When you do the plugs, do it COLD, no anti-seize, 13 ft/lb of torque, and take a hard look at the connector boots for tracking or cracks. The rear coil pack is a chore because the rear A.I.R. injection valve has to come off, and its metal feed pipe needs to be disconnected down behind the rear cylinder head. Not fun. IF you decide to change the transaxle fluid remember that you have a dry sump unit: there will be NO FLUID on the dipstick with the engine off. The engine must be running, warm, in P, to properly check the fluid. Fill to halfway up the dipstick marks. If you can, use the new synthetic DEXRON-VI or equivalent. It is 100% compatible with old DEXRON-III.
 

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1996 Montana Blue Eldorado,1982 Eldorado Biarritz Diesel
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148 Posts
Re: SubM or??

Are (ACDelco #41-987 Platinum) the same plugs for a 1996 Northstar?
 

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99 STS 2002 STS
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110 Posts
Discussion Starter #7
Ok chaps thank you all for the replys, looks like it will be a cheap service then...
 
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