Page 298 of 472

After conversion to the high performance brake fluid,
follow the brake fluid service recommendations outlined
by the fluid manufacturer. Do not use silicone or
DOT‐5 brake fluids.
If the vehicle is a Z06, ZR1, or Grand Sport model, it
has greaseable outer ends on both of the rear toe‐links.
Under normal use, lubrication should be performed as
described in the maintenance schedule. See Scheduled
Maintenance
on page 7‑3and Recommended Fluids
and Lubricantson page 7‑10. If using the vehicle for
racing, lubrication should be performed at the end of
each racing day. See your dealer/retailer for lubrication
and make sure any needed repairs are made at once.
Proper procedures for performing these services can be
found in the service manual. See Service Publications
Ordering Information on page 8‑16.
If the vehicle is used for racing or other competitive
driving, the rear axle fluid temperatures may be higher
than would occur in normal driving. We recommend that
the rear axle fluid be drained and refilled with new fluid
after every 24 hours of racing or competitive driving.
See Recommended Fluids and Lubricants
on
page 7‑10for what fluid to use.
ZR1 Brake Burnish Procedure
Notice: These procedures are specific to the ZR1
with ceramic brake rotors. These procedures should
not be run on other Corvette models as damage
may result.
Notice: The new vehicle break‐in period should be
completed before performing the brake burnish
procedure or damage may occur to the powertrain/
engine. See New Vehicle Break-In on page 3‑21.
When performed as instructed, these procedures will
not damage the brakes. During the burnishing
procedure, the brake pads will smoke and produce an
odor. The braking force and pedal travel may increase.
After the procedure is complete, the brake pads may
appear white at the rotor contact.
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Page 359 of 472
Brake Rotor Wear
ZR1 models have ceramic brake rotors. Rotors should
be visually inspected whenever the brake pads are
replaced. Rotors also need to be weighed before brake
pads are replaced to confirm that the rotor mass is
greater than the wear‐out mass printed on the rotor.
The rotor can be reused if the weight of the rotor is
above the mass limit. Rotor inspection and weighing
methods can be found in the service manual. See
Service Publications Ordering Information
on
page 8‑16.
Brake Rotor Protector
{WARNING:
Ceramic rotors will be very hot after operation and
touching them may cause burns. Be sure brake
system is completely cool prior to installation of
protector, or coming in contact with them. Notice:
Rotors may be chipped if hard contact is
made with the wheel during wheel installation or
removal. Always use the rotor protectors. Be sure
to carefully follow wheel removal and installation
instructions.
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Page 360 of 472

A rotor protector should always be installed before
any wheel removal. The protector can be installed by
feeding it through the wheel spokes and slipping it over
the outer edge of the rotor. Leave the protector in place,
over the rotor edge, until the wheel is re‐installed. Rotor
protectors are available through your dealer/retailer.
Brake Pedal Travel
See your dealer/retailer if the brake pedal does not
return to normal height, or if there is a rapid increase in
pedal travel. This could be a sign that brake service
might be required.
Brake Adjustment
Every brake stop, the disc brakes automatically adjust
for wear.
Replacing Brake System Parts
The braking system on a vehicle is complex. Its many
parts have to be of top quality and work well together if
the vehicle is to have really good braking. The vehicle
was designed and tested with top-quality brake parts.
When parts of the braking system are replaced —for
example, when the brake linings wear down and new
ones are installed —be sure to get new approved
replacement parts. If this is not done, the brakes might
not work properly. For example, if someone puts in
brake linings that are wrong for the vehicle, the balance
between the front and rear brakes can change —for the
worse. The braking performance expected can change
in many other ways if the wrong replacement brake
parts are installed.
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Page 395 of 472
Tightening Wheel Lug Nuts
{WARNING:
Never use oil or grease on studs or the threads of
the wheel nuts. If you do, the wheel nuts might
come loose and the wheel could fall off, causing
a crash.
{WARNING:
Incorrect wheel nuts or improperly tightened wheel
nuts can cause the wheel to become loose and
even come off. This could lead to a crash. Be sure
to use the correct wheel nuts. If you have to
replace them, be sure to get new GM original
equipment wheel nuts. Notice:
Improperly tightened wheel nuts can lead
to brake pulsation and rotor damage. To avoid
expensive brake repairs, evenly tighten the wheel
nuts in the proper sequence and to the proper
torque specification.
Tighten the wheel lug nuts
firmly in a crisscross
sequence as shown.
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