GMC TopKick 2007 Owner's Manual page 296

What to Add
Use the proper fluid listed in the Maintenance
Schedule. Use new brake fluid from a sealed
container only.
Always clean the brake fluid reservoir cap/cover
and the area around the cap/cover before
removing it. This will help keep dirt from entering
the reservoir.
CAUTION:
{
With the wrong kind of fluid in the brake
system, the brakes may not work well, or
they may not even work at all. This could
cause a crash. Always use the proper
brake fluid.
296
Notice:
•
Using the wrong fluid can badly damage
brake system parts. For example, just a few
drops of mineral-based oil, such as engine
oil, in the brake system can damage brake
system parts so badly that they will have to
be replaced. Do not let someone put in the
wrong kind of fluid, and do not use DOT-5
silicone brake fluid.
•
If you spill brake fluid on your vehicle's
painted surfaces, the paint finish can be
damaged. Be careful not to spill brake fluid
on your vehicle. If you do, wash it off
immediately. See Washing Your Vehicle on
page 335.