The vehicle must be in TRACK mode.

–

Performance Traction Management mode must be enabled.

–

The steering wheel must be pointed straight.

–

The driver door must be closed.

–

The parking brake must not be engaged.

–

The vehicle must be stopped on level ground.

–

The accelerator pedal must not be applied.

–

The vehicle must be in 1 (First) gear.

Track Event and Competitive Driving
Danger: High-performance features are intended for use only on closed tracks by experienced and qualified drivers and should not be
used on public roads. High-speed driving, aggressive cornering, hard braking, and other high-performance driving can be dangerous.
Improper driver inputs for the conditions may result in loss of control of the vehicle, which could injure or kill you or others. Always drive
safely.

Boost Gauge
The boost gauge indicates vacuum during light to moderate throttle and boost under heavier throttle.

Brake Fluid
Brake fluid should be changed to DOT 4 fluid.

Brake Pads
New brake pads must be burnished before racing or competitive driving.

Checking Engine Oil Level
When checking the engine oil level, 30 minutes of run time is considered warm to make sure all engine oil drains back into the pan in order to get an
accurate reading. Wait 2 hours if checking the level when it’s cold.

Electronic Limited-Slip Differential (eLSD)
The Electronic Limited-Slip Differential (eLSD) is a hydraulically actuated clutch system. It can infinitely vary the clutch engagement between 0 and
200 Nm of breakaway torque between the rear wheels. It responds to full engagement within 0.150 seconds when necessary. It improves traction
while cornering by changing the engagement to achieve a balance between directional control and acceleration. The eLSD on the 1LE has a unique
calibration, but the final ratio is the same.

eLSD Modes
eLSD modes change automatically when the traction control button is pressed as follows:
–

Mode 1: The standard mode when the vehicle is started. Emphasis is on vehicle stability. Also used in PTM wet mode.

–

Mode 2: Engaged when both TCS and StabiliTrak® are turned OFF. Provides more nimble corner turn-in, and is biased for better traction
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out of corners.
–

Mode 3: Engaged when PTM is engaged in Dry, Sport 1 & 2 and Race Modes. Nimble calibration with similar functionality as eLSD Mode 2,
however it is integrated to work with PTM.

–

Mode 4: Engaged when TCS is selected OFF, but StabiliTrak® remains ON. Vehicle stability is still the priority, while allowing for optimized
traction out of corners.

eLSD and Wheel Slip Displays
The upper eLSD display indicates the eLSD clutch locking percentage. The lower wheel slip display indicates the rear tire slip compared to the speed
of the front tires.

Lap Shoulder Belt
The lap shoulder belt has an Automatic Locking Retractor feature which is useful in performance driving when the driver wants to be held in the seat
more tightly to take advantage of the aggressive bolstering of the seat.
1.

Move the seat 3-4 inches (8-10 cm) rearward from the normal driving position.

2.

Pull the driver should belt out as far as it will go, until it stops, to set the lock. While holding the shoulder belt in this position, buckle the belt.
When the shoulder belt is released, the retractor will make a ratchet sound when it retracts. When the retractor lock is set, the belt can be
tightened but not pulled out of the retractor.

3.

Adjust the belt close to your body, and then move the seat forward 8-10 cm (3-4 inches) to the desired driving position. This will hold the bet
to your body even tighter. The belt fit should be tight, but not uncomfortable.

4.

To unlatch the belt, press the button on the bucket. The belt should return to its stowed position.

High Performance Summer Tires
Caution: High performance summer tires have rubber compounds that lose flexibility and may develop surface cracks in the tread area at
temperatures below 20°F (−7°C). Always store high performance summer tires indoors and at temperatures above 20°F (−7°C) when not in
use. If the tires have been subjected to 20°F (−7°C) or less, let them warm up in a heated space to at least 40°F (5°C) for 24 hours or more
before being installed or driving a vehicle on which they are installed. Do not apply heat or blow heated air directly on the tires. Always
inspect tires before use.

Lightweight Forged Aluminum Wheels
The ZL1 1LE is equipped with new, specific lightweight forged aluminum wheels that are an inch wider but an inch smaller in diameter, front and rear,
than standard ZL1 wheels and are used with the new Goodyear Eagle F1 Supercar 3R tires, 305/30ZR19 front and 325/30ZR19 rear, that deliver a
maximum lateral grip of 1.10g. Once these tires are in the proper operating range in terms of temperature, they grab extremely well. The overall
footprint grows approximately 10 percent over the ZL1, but the wheel-and-tire package weighs about 3.3 pounds (1.5 kg) less per corner. The ZL1
1LE is equipped with a tire inflator kit.

Tire Pressure and Temperature
Tire pressure specifications will vary based on driving style, track, temperature, and weather conditions. Limit the vehicle weight to a maximum of the
driver and one passenger, with no additional cargo.
Using the cluster, press SEL to enter the performance menus. Use the Up / Down arrows to scroll through the available items.
Tire Temp: Tire Temp displays the current tire temperature status as follows:

•

Cold Drive with caution as tire performance may be degraded

•

Cool Drive with caution as tire performance may be degraded

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•

Normal Tires are at normal driving temperature

•

Warm Tires are ready for aggressive driving

•

Overheated Tire temperature may be higher than optimal

Tire Pressure — Competitive Driving
Model

Axle

Road Course
Cold Starting
Pressures (1)

Road Course Target
Hot Pressures (1)

Drag Strip
Cold Starting
Pressures

Sustained
High Speed
Cold Starting
Pressures (2)

ZL1 1LE Tire
Pressure Settings

Front

26 psi (180
kPa)

32–35 psi (220–240
kPa)

N/A

44 psi (300
kPa)

Rear

26 psi (180
kPa)

32–35 psi (220–240
kPa)

N/A

44 psi (300
kPa)

(1) Value will vary based on driving style, track, temperature and weather conditions.
(2) Autobahn, standing mile, etc.
Notice: Before leaving the track event, reset tire pressures to the recommended inflation pressures on the Tire and Loading Information
label.

Rear Axle Fluid
The rear axle fluid must have accumulated 1,500 miles (2,414 km) of break-in before being used in track driving.

Suspension — Adjustable Front Struts
Camber Position for Track Events
The front strut top mount can be positioned two ways. The original setting is in the street position, but it can be turned 180° to the track position for
additional negative camber on the front.
To adjust the position:
1.

Raise the vehicle so the tires are slightly off the ground.

2.

From the bottom side of the strut top mount, remove the Allen bolt that secures the top mount alignment pin to the top mount.

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3.

Remove the three strut mount bolts and the alignment pin.

4.

Using the hex feature on the top of the mount, turn the top mount 180° until the TRACK CAMBER text is visible and the second set of top
mount holes aligns with the strut tower holes.

5.

Reinstall the top mount bolts and torque to 21.4 lb ft (29 Nm).

6.

Keep the top mount alignment pin and bolt for reinstallation when the struts are returned to the street position following the track event.

7.

Verify and adjust the vehicle alignment per track alignment specifications to optimize vehicle performance for the track event.

8.

Verify and re-adjust the vehicle alignment as needed following the track event.

Strut Spring Seat Adjustment
The front struts have a threaded spring seat that allows adjustment of the preload on the front springs. The vehicle corner weights and front trim
heights can be adjusted.
The spring seat can be adjusted approximately 0.4 inch (10 mm) up or down from the nominal position. Each complete turn of the spring perch will
change the vehicle height approximately 0.06 inch (1.4 mm). Do not allow the spring seat to contact the black dust boot when adjusting in the
maximum upward direction.
To adjust the lower spring seat:
1.

Raise the vehicle so the tires are completely off the ground.

2.

Loosen the lower spring seat bolt. Do not completely remove the bolt.

3.

Turn the spring perch upward to increase spring preload, or downward to decrease spring preload.

4.

Torque the spring seat bolt to 7.4 lb ft (10 Nm).

5.

Verify and adjust the vehicle alignment as needed following the spring seat adjustment.

Suspension — Adjustable Rear Stabilizer Bar

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The rear stabilizer bar ends have three attachment positions that allow the rear roll stiffness of the vehicle to be adjusted.
The stabilizer bar stiffness increases approximately 15% using the rearward holes, or decreases approximately 10% using the forward holes.
To change the attachment position:
1.

Raise and support the rear of the vehicle.

2.

Remove the stabilizer bar link nut while holding the ball stud end.

3.

Reposition the stabilizer bar link stud to the desired hole and tighten to 32 lb ft (43 Nm). Use the same hole position for both sides of the
vehicle.

Suspension — Multimatic Dynamic Suspension Spool Valve Dampers

Multimatic DSSV® (Dynamic Suspension Spool Valve) Damper
Additional track performance is provided by the lightweight Multimatic DSSV® (Dynamic Suspension Spool Valve) dampers and the way they're
mounted to the Camaro. They're similar in basic operation to what the Z/28 was equipped with, but have been recalibrated for this car's weight and
the tires. The rears are essentially identical to the Z/28 units, but have also been recalibrated. The front struts are manufactured with aluminum
bodies instead of steel. The aluminum bodies on the front shocks, for example, saved 18 pounds of unsprung mass alone. In total, the DSSV shocks
are 23 pounds lighter than the Magnetic Ride system found on the regular ZL1. The rubber isolator was also eliminated, so they are hard-mounted to
the shock towers, providing more rigidity and precise control, in addition to saving some weight.

Water Deflector

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When operating a ZL1 1LE on a closed course in hot temperatures, remove the water deflector to increase airflow and improve cooling by removing
the three bolts. Replace the water deflector immediately after track use to protect the engine compartment from water intrusion.

Wheel Alignment
Track wheel alignment specifications are for a vehicle at curb weight conditions, meaning a full tank of fuel and zero ballast. Racing and competitive
driving wheel alignment settings may cause excessive tire wear.
Racing and competitive driving wheel alignment settings can be set as follows for increased track handling performance:

Track Wheel Alignment Specifications
Model

ZL1/1LE
Track
Alignment
Settings

Axle

Caster (Not
Adjustable)

Camber

Total Toe

Steering
Wheel Angle

Thrust Angle

Left

Right

Left

Right

(Left + Right)

Front

7.9°

7.9°

−2.7° ±
0.15°

−2.7° ±
0.15°

0.1° ± 0.05°

0.0° ± 3.5°

—

Rear

—

—

−2.0° ±
0.15°

−2.0° ±
0.15°

0.1° ± 0.05°

—

0.0° ± 0.1°

Underbody Air Deflector Tire Dam Kit

14

(Left −
Right)/2

The underbody air deflector tire dam kit provided with the ZL1 1LE reduces the amount of aerodynamic lift on the front axle for better handling. The
original tire dams must be reinstalled after a track event.

Towing
Use only a flatbed tow truck for towing a disabled vehicle. Never use a sling type lift or damage will occur. Use ramps to help reduce approach
angles if necessary. Do not lash or hook to suspension components. Use the proper straps around the tires to secure the vehicle. A towed vehicle
should have its drive wheels off the ground.
Due to the high spring rate and spring design used on the ZL1 1LE, spring spacers are not provided.
⇒

If more clearance is needed when towing, raise the adjustable spring seat to lift the front suspension. Refer to Strut Spring Seat Adjustment in
this Bulletin.

Washing the Vehicle
DO NOT take the vehicle to an automated car wash. Hand wash only. The ZL1 1LE is not compatible with automatic car washes, it must be hand
washed. Do not use any detergent, soap, or cleaners on the hood wrap.

Version Information

Version

1

Modified

Trademark Footnotes
Brembo® is a Registered Trademark of Brembo SpA.
DSSV™ and DSSV Damping Technology™, are Trademarks of Multimatic Inc.
RECARO™ is a Trademark of RECARO Beteiligungs-GmbH
StabiliTrak® is a Registered Trademark of General Motors LLC
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions
that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the
equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin
applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.

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