There are 2 different answers you'll get to this question. There will be
a flood of replies from guys saying you can wait till 50,000 to change
the fluid and there will be replies from others saying its okay to
change the fluid at 30,000.
The choice is yours, really. If the fluid is still red in color it
should still be alright to run it a bit longer.
I change mine around 30,000.
1991 Pontiac Bonneville LE
3800 V6 ( C ), Black/Slate Grey
~~~The Former Fleet ~~~
89 Cavalier Z 24 convertible
78 Holiday 88 coupe
68 LeSabre convertible
73 Impala sedan