This is usually in the 00 General section of the FSM as well as in the owners manual.

The various service manuals are in the resources section of the site.

There are many threads on what fluid to use in a 420A trans in the 420A drivetrain forum cause the Texaco spec might be difficult to find or cross.

steve said:

This is usually in the 00 General section of the FSM as well as in the owners manual.

The various service manuals are in the resources section of the site.

https://www.dsmtuners.com/forum/articles-manuals-documents.262/

There are many threads on what fluid to use in a 420A trans in the 420A drivetrain forum cause the Texaco spec might be difficult to find or cross.

https://www.dsmtuners.com/forum/420a-drivetrain-tech.96/

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Thank you so much mr steve!

kayladsm said:

Thank you so much mr steve!

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In your signature it looks like you have an automatic so you don't have to worry about crossing the texaco fluid. The automatics you want to use ATF+4

97egl said:

In your signature it looks like you have an automatic so you don't have to worry about crossing the texaco fluid. The automatics you want to use ATF+4

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I can also use atf 4 for ps fluid as well right?

kayladsm said:

I can also use atf 4 for ps fluid as well right?

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I wouldn't recommend it. Using the wrong fluid can swell or deteriorate seals and other rubber parts. 8 bucks for power steering fluid is a lot cheaper than a new rack or pump.

The fluid recommend for the power steering is a transmission fluid but it is not the same thing as ATF+4. Dexron II is for older GM cars. You probably will only find Dexron III but all GM Dexron fluids supersede each other so you can use a higher number Dexron and it is still compatible. Alot of times the bottle at the parts store will say DEX/MERC on it. That is the fluid you want

Most variations of the Dexron/Mercon fluid will work for the power steering. It's been over 3 years since I installed the current pump with a generic brand of that fluid and it's been fine. I'll tell you what isn't fine though is Lucas power steering fluid. I used some of that a few years back and it ruined the power steering pump within 2 days. I could probably still be using the OEM pump if I would've just used Dexron/Mercon