Thanks for GIVING me a CORRECT.
[I do know what I am talking about. My experience is as a MASTER TECH, Service Manager, QUALITY CONTROL INSPECTOR at factory, Motor Vehicle Warranty Auditor for manufacturers, Regional District Manager in automotive field 🚗 I speak from real world experience.]
My point is ATF will not hurt system on GM system.
Can you use Transmission Fluid in a Power Steering Pump?
Most of the vehicle manufacturers design their steering systems to run under specialized PS fluids to give best results. There are also some systems that even use
automatic transmission fluids for their power steering.
They usually have the words ‘Use automatic transmission fluid’ or ‘Use Dexron’ or ‘Use Mercon’ inscribed on the fill cap or in the owner’s manual. ATFs offer the advantage of having detergents in them which help keep your system clean.
It is safe and okay to use automatic transmission fluid on the systems that are designed to run on them. However it should not be used on systems that specifically require power steering fluid.
Besides, the recommended power steering fluids are not so expensive and are as easily available as tranny fluids. So you do not end up saving money by using an ATF in your power steering system.
The only instance it may be okay to use transmission fluids in a steering pump is during an emergency. And if done, the steering pump may work only for a short time.
It may soon lead to problems in the steering parts. The only models that permit
using transmission fluids in the steering pump are Chrysler, Ford, and GM vehicles.