Dex VI ATF compatible with a 1999 Chevy Camaro PS system?

[69GTX]

I finally found out that my local shop when replacing the PS pump on my '99 Camaro SS switched over to Dex VI (ie Wolf's Head synthetic Dex VI HD) despite me telling and providing them with the correct fluid. What I had in there prior was the factory GM light amber PS fluid (GM 89021182, 19329448 or 19329450, also called AC Delco 10-1073, 10-1074 depending on 16 or 32 oz size). I searched through old Bitog, Reddit, Quora, LS1Tech.com threads on the subject. Plenty have done it w/o any negative effects. In fact I don't think I found one instance where someone positively confirmed a failure or major issue with a fluid change to ATF. Many others don't recommend the kinematic viscosity drop (7.5 to 6.1), higher detergent pack, and the FM"s of the ATF. Even GM uses Dex VI in their later vehicles though the old GM Saginaw PS spec is still in play on many older cars. The shop told me they called a GM/Chevy dealer and was told the Dex VI is the "correct" fluid. That's clearly not right as any google search will immediately call up the original GM PS fluid.

So is there any chance of messing up seals or other parts of the steering gear with this change? I'm not really worried about the pump as it's a decent quality "knock-off" made by Atlantic Power Steering/AAE Steering.com. AC Delco no longer makes the original pumps. I have no idea if the shop properly flushed out ALL the old fluid before replacing the reservoir/pump. The reservoir was basically empty when they got the car as it had a crack in the reservoir base. I'm pretty fussy about the fluids used in the car as it's a factory stock 20K miles in very nice shape. Why change what has worked fine for 26 years without any issues, noises, etc? The pump/reservoir took a "whack" when the plastic PS pulley came off and went down the road behind me.

Opinions appreciated.

 

[ripcord]

I highly doubt it it will make any difference at all.

 

[clinebarger]

Been running TES-295 (synthetic Dexron III) in my 2001 Camaro for 10 years....Though I have a 5th Gen FEAD & PS pump.

 

[slacktide_bitog]

Yes, you can use Dexron VI with no problem

 

[69GTX]

Yes, you can use Dexron VI with no problem

Thanks. I'm feeling a bit better about it. Another discussing with the shop yesterday and today, they offered to flush out
the Dex VI and put back in the original GM spec fluid.

I think a semi-syn "Ford" Mercon V with the higher viscosity (7.4 cSt) "could" have been a better choice if a change to ATF
had to be made. Redline DW-4 another good choice if going full synthetic. Merc V is the spec fluid for my 2001 Lincoln
in both PS and Auto Transmission systems.

 

[slacktide_bitog]

Thanks. I'm feeling a bit better about it. Another discussing with the shop yesterday and today, they offered to flush out
the Dex VI and put back in the original GM spec fluid.

I think a semi-syn "Ford" Mercon V with the higher viscosity (7.4 cSt) "could" have been a better choice if a change to ATF
had to be made. Redline DW-4 another good choice if going full synthetic. Merc V is the spec fluid for my 2001 Lincoln
in both PS and Auto Transmission systems.

PS systems usually aren't picky about fluid, except Honda and the Euros.

Even some of the Fords that originally called for Mercon V let you use Mercon LV instead.

 

[ripcord]

Ford pickups through the 90s spec'ed Type F ATF but I've never had an issue running regular DEX/MERC in any of mine. My brother had one that leaked out the gear box really bad that he'd used PS fluid in but I doubt if that had anything to do with it