Join Date: Jun 2015
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Yes mine was pretty dark. I'm trying to copy the procedure from the service manual but for some reason it isn't letting me. But here's basically what it says-
1. Jack up front end so the front tires are off the ground.
2. Remove all the fluid you can from the reservoir
3. Turn the wheels lock to lock with the key on engine off, then suck that fluid out
4. Remove the return line (at the reservoir is easiest) and plug the barb coming out of the reservoir
5. (This is what i found to be the easiest) extend the return line by inserting another hose into a drain pan.
6. Key on engine off, have someone turn the wheels lock to lock while you add fluid to the reservoir, until what comes out the return line is new clean fluid.
7. Hook the return line back to the reservoir, I found the clamp that's on there from factory will NOT re seal and its best to use the "screw" type hose clamp.
8. Bleed the air, Have your assistant turn the wheels lock to lock, key on engine off, until the fluid level settles, this may take a little while. Unless you have a vacuum pump with the adapter for the reservoir, in that case apply 10-15 in of vacuum for 20 minutes.
9. Have the wheels straight, start the car, Leave the cap off, observe with a flashlight any change in fluid level or if you hear a squealing sound, shut the car off as the pump is sucking air.
10. Let the car run 10 minutes with wheels straight and off the ground with cap off.
11. Replace cap, lower car and test drive for 5-8 miles, take some extra fluid with you in case of a problem. When you return check the fluid level and add if necessary.
This is what the manual says, I'm sure there's other ways to do this, and just sucking the fluid out of the reservoir and adding new does ALOT and is often sufficient (according to my friend who's a tech at a gm dealer)