Originally Posted by Bill Dearborn
I did a Yahoo search on 89021185 and found somebody's order for 89021184 on GM Parts Direct. The web site said it added 89021185 to the person's shopping cart because 89021185 replaced 89021184. GM periodically rolls part numbers for some reason or another. Could be all they did was switch suppliers.
Sounds reasonable, thanks.
Since I flushed my system with the 1184 stuff and have ~1/3 bottle left over, I'll use that for any top-offs required until I do the next flush in about three years. AFAIK, there shouldn't be any problem with the opened-and-recapped PS fluid absorbing moisture from the air, like brake fluid will do in a hurry.
BTW, my steering "flush" is simply the Service Manual procedure, no exotic flushing fluids or machines.