1967 CHEVROLET CAMARO air condition

ACCESSORIES 15-7

6. The car begins to descend a hill--car speed in-

creases slightly and the regulator movements oc-

curing above occur again except in reverse. The

rubber drum is turned further against spring tension

and the air bleed orifices are uncovered more. This

bleeds more air to the Servo reducing the vacuum in

the unit. The diaphragm moves away from the

vacuum port, closes the throttle slightly, and with-

draws the tapered needle from the vacuum orifice.

With the orifice enlarged, the increased vacuum

counteracts the increased air bleed and the dia-

phragm finds a balance again at a reduced throttle

opening.

7.
Driver accelerates by pressing accelerator pedal-

car speed increases and the system responds by

moving the diaphragm to decrease throttle opening.

Since a bead chain is used, the chain merely relaxes

and has no effect on throttle operation. After the

driver releases pressure from the pedal, the throttle

will close until car speed decreases to the pre-set

speed. At that point the Regulator bleeds less air

to the Servo which opens the throttle enough to

maintain the pre-set speed. The system returns to a

stable condition.

8. Driver desires higher controlled speed, presses ac-

celerator until new speed is reached, and depresses

Engagement Switch fully and releases button--speed

sensing assembly tries to turn in a direction that

would decrease the throttle opening until the driver

fully depresses the Engagement Switch. Then the

current is cut off to the solenoid which retracts; the

solenoid nose expands the "U" clip releasing its

grip on the rubber drum. The drum and disk as-

sembly then rotates to a new position because of the

higher car speed. When the solenoid retracts, it also

shuts off vacuum to the Servo and opens the vacuum

port to atmospheric pressure within the Regulator

thereby bleeding down the Servo toward idle throttle

position. As the driver releases the Engagement

Switch, the contacts cause "pull in" and "hold in" of

the solenoid respectively. The system is engaged to
maintain the car speed at the time of Engagement

Switch release.

9. Driver desires lower cruising speed, presses En-

gagement Switch fully, waits until car speed de-

creases to desired speed then releases Switch--when

the Engagement switch is fully depressed the sole-

noid is de-energized causing the vacuum switch to

bleed down the Servo to idle throttle position and the

"U"
clip of the idle bleed valve is released from the

rubber drum. The drum and disk assembly is free

to rotate to a position which corresponds to vehicle

speed as the car slows. When the driver releases

the Engagement Switch, the unit "pulls in" and "holds

in" in the normal manner. The air bleed valve is

clutched to, the rubber drum at the car speed during

switch release. Vacuum is again applied to the

Servo and throttle control is assumed by the Regu-

lator to maintain the car speed at the time of switch

release.

10.
With system in operation, driver applies brakes--

simultaneously the Vacuum Release and Electric

Release Switches operate. The Vacuum Switch

bleeds air into the Servo through the air bleed line

coming from the Regulator. The vacuum is reduced

in the Servo and the throttle returns to idle position.

The Electric Release Switch cuts off power to the

entire system and the solenoid is de-energized. If

the driver removes his foot from the brake pedal the

Electric Switch again feeds voltage to the Engage-

ment Switch and the Vacuum Switch seals the air

bleed line. If the vehicle speed is above 20 mph

when this occurs, reduced voltage will flow to the

solenoid through the 40 ohm wire which will not be

sufficient to "pull in" the unit. If vehicle speed is

below 20 mph no current will flow since the tang

on the rubber drum has opened the low limit switch

points in the Regulator. In either case, after de-

pressing the brake pedal, the system will not con-

trol car speed until the driver operates the engage-

ment switch above 20 mph.

SERVICE OPERATIONS

The components of the Cruise Master system are de-

signed to be replaced should they become inoperative.

The Regulator is calibrated in such a manner during

manufacturing that overhaul operations are impractical.

However, one adjustment may be made to the Regulator to

correct speed drop or increase at the time of

engagement.

BRAKE RELEASE SWITCHES

ELECTRIC

Service — An inoperative switch must be replaced.

Switch replacement is identical to standard brake lamp

switch replacement.

Adjustment- The brake switch plunger must clear the

pedal arm when the arm is moved 1/4 inch measured at

the switch (Figure 7).

VACUUM

Service
—
An inoperative (sticking, plugged, or leaking)

switch must be replaced. Switch replacement is similar
to brake switch replacement. Be certain that the hose to

the switch is connected firmly and is not cracked or

deteriorated.

Adjustment- The brake switch plunger must clear the

pedal arm when the arm is moved 5/16 inch measured at

the switch (Figure 7).

ENGAGEMENT SWITCH

Service

replacement.
The engagement is serviced only by

Removal

1.
Pry the engagement button out of the turn signal knob

with a small thin bladed screwdriver (Figure 2).

2.
With a small hook or long nosed pliers, remove the

switch retaining ring.

3.
.Pull switch outward utilizing the slack in the wiring

harness.

4.
With a small soldering iron, unsolder the wires and

resolder them to the correct terminals of the re-

placement switch.

CHEVROLET CHASSIS SERVICE MANUAL

ACCESSORIES 15-9

Adjustment- Adjust the bead chain so that it is as tight

as possible without holding the throttle open when the

carburetor is set at its lowest idle throttle position.

When connecting the bead chain (engine stopped) manually

set the fast idle cam at its lowest step and connect the

chain so that it does not hold the idle screw off the cam.

If the chain needs to be cut, cut it three beads beyond the

bead which pulls the linkage.

REGULATOR

Service - A defective regulator, that is one which is not

simply out of adjustment, must be replaced. During re-

placement, check the hoses which connect to the regulator

and replace any which are cracked or deteriorated.

Air Filter

The air filter located in the solenoid cover should be

cleaned and re-oiled at engine oil change intervals.

1.
Snap the solenoid cover off.

2.
Remove the filter and wash it in kerosene or mineral

spirits. Squeeze it dry and wet with SAE 10 engine

oil.
Squeeze out excess oil and reinstall into the

cover.

3.
Attach the cover with neoprene seal to the solenoid

housing. Be certain that the cover fits tightly to the

housing.

One regulator adjustment is possible: Engagement-

Cruising Speed Zeroing (to remove any difference be-

tween engagement and cruising speed).

NOTE:
No regulator adjustment should be

made, however, until the following items have

been checked or serviced:

1.
Bead chain properly adjusted.

2.
All hoses in good condition, properly attached, not

leaking, not pinched or kinked.

3.
Regulator air filter clean and properly oiled.

4.
Electric and vacuum release switches properly

adjusted.

Engagement—Cruising Speed Zeroing

If the cruising speed is lower than the engagement

speed, loosen the orifice tube locknut and turn the tube

outward; if higher, turn the tube inward. Each 1/8 turn

will alter the engagement-cruising speed difference one

mph. Tighten the locknut after adjustment and check the

system operation at 50 mph.

ELECTRICAL SYSTEM CHECK OUT

1.
Check fuse and connector.

2.
Check electric brake switch as follows: Unplug con-

nector at brake switch. Connect ohmmeter at points

A and B on brake switch. The ohmmeter must indi-

cate infinity when the brake pedal is depressed and

continuity when pedal is released. The cruise re-

lease brake switch (electric) is adjusted as is the

standard stop light brake switch. Replace electric

brake switch if needed.

3.
Check engagement switch and connecting wiring as
follows: Unplug push button control connector

(brown, blue, black) at electrical wiring harness con-

nector and perform the following tests. (See Fig-

ure 10)

Test #1
—
Connect ohmmeter between terminal #1 (brown

wire) and terminal #2 (blue wire). Continuity shall be

maintained until switch is depressed all the way in.

Test #2
—
Connect ohmmeter between terminal #1 (brown

wire) and terminal #3 (black). No continuity shall be

shown; however, when the button is depressed halfway,

continuity shall be indicated. When the button is pressed

all the way down, no continuity shall be shown.

Test #3 — Connect ohmmeter between terminal #2 (blue

wire) and terminal #3 (black). Button released, no con-

tinuity; however, when the button is depressed partially

and fully, continuity shall be shown.

4.
Check regulator solenoid coil, low-speed switch, and

wiring harness as follows:

a. Disconnect engagement switch wire harness con-

nector from the main wire harness connector

(brown, blue, and black wires). Connect ohm-

meter
'
between point C (blue wire in main wire

harness) and ground. (Make sure the regulator is

well grounded to chassis.) The ohmmeter should

read 45 ohms ± 2 ohms. If a resistance of

greater value is shown, then disconnect the con-

nector from the regulator and measure the re-

sistance of the blue wire from point C to D. It

should measure 40 ohms. Check the resistance

from point E (vertical bar of terminal forming T)

to ground. It should measure 5 ohms ± 1/4 ohm.

Replace either the wiring harness or solenoid as

needed if greater values are indicated. The black

harness wiring from point F to G should also be

checked for continuity.

ENGAGEMENT SWITCH TEST

BUTTON POSITION

Cruise (released)

Engage (partially depressed)

Trim (fully depressed)
TERMINALS

1 TO 2

closed

Closed

open
1 TO 3

open

closed

open
2 TO 3

open

closed

closed

SERVO AND VACUUM SYSTEM CHECK OUT

To determine the condition of the diaphragm, remove

hoses from power unit and apply 14 inches of vacuum to

either vacuum tube opening (seal the other opening) and

hold in for one minute. The vacuum shall not leak down

more than 5 inches of vacuum in one minute. If leakage

is detected, replace servo. To utilize engine as a vac-

uum source, proceed as follows:

1.
DISCONNECT SERVO $EAD CHAIN and hoses from

servo and connect engine vacuum directly to vacuum

servo fitting (fitting in middle of servo). Seal the

servo unit opening.

2.
Note position of servo diaphragm.

3.
Start engine - the diaphragm should pull in.

4.
Clamp off engine vacuum supply line and check for

leakage. '

The cruise release brake switch (vacuum) and connecting

hoses can likewise be checked using a vacuum pump.

CHEVROLET CHASSIS SERVICE MANUAL

ACCESSORIES 15-11

12 VOLTS D.C.
ELECTRIC BRAKE

RELEASE

IGNITION

SWITCH

ENGINE

VACUUM

TRANSDUCER

Fig.
11 - Vacuum and Electrical Diagram

AUTOMATIC LEVEL CONTROL

INDEX

Page

General Description . . 15-11

System Checks and Adjustments 15-13

Service Operation . 15-15

GENERAL DESCRIPTION

A pneumatic level control system that automatically

maintains correct rear trim height of a car under varying

load conditions, the optional automatic level control is

used only in conjunction with the Superlift Shock Absorber

option.

The Superlift Shock Absorber option alone, consists of

the two shock absorbers with pressure lines to a "Tee"

where a ill valve is located, the shocks are inflated

with (or deflated of) compressed air (at any gas station)

to obtain the vehicle level desired with any given load

change.

The automatic leveling system is added to the Superlift

Shock Absorbers and supplies its own compressed air.

The system (fig. 13) consists of a vacuum operated air

compressor with pressure regulator,
and
integral storage

tank, vacuum line to engine, air intake filter, air lines,

and a height control valve.

The COMPRESSOR is a two-stage, vacuum actuated

type, requiring no lubrication. Vacuum supply is taken

from engine carburetor base. High pressure air is
supplied to the reservoir tank by the second stage of

the two-stage compressor. The first stage intake stroke

draws air at atmospheric pressure through a oneway

check valve located in the end of the first stage housing

under the first ^tagei housing cover. On the first stage

compression stroke, the intake valve is closed and the

oneway check valve in the second stage end of the piston

is opened. This allows the air from the first stage

cylinder to flow through the hollow piston into the second

stage cylinder for jhigh pressure compression. The

second stage compression stroke closes the check valve

in the piston and opeijis the check valve in the end of the

second stage housing.

The intake and compression strokes are controlled by a

sliding distributor valive that is actuated through an arm

that is tripped by the piston as it nears the end of each

stroke. Each time the arm actuates the distributor

valve, a different set of holes are covered in the first

stage housing. The distributor valve controls the flow of

intake manifold vacuum and air under atmospheric pres-

CHEVROLET CHASSIS SERVICE MANUAL

SPECIFICATIONS

HEATING
AND AIR
CONDITIONING

SECTION
1A

Compressor

Make Frigidaire

Type
. 6
Cylinder Axial

Displacement

Four-Season
12.6
Cu.
In.

Universal
and
Ail-Weather
.... .10.8 Cu. In.

Rotation Clockwise

Compressor Suction
and
Discharge

Connector Bolt Torque
.......
25 ft lbs.

Compressor Clutch Coil

Ohms
(at
80°F.).
4.18-4.38

Amps
(at
80°F.)
2.86 @ 12
Volts

Torques

Rear Head
to
SheU Stud
Nut 23 lb. ft

Shaft Mounting
Nut 15 lb. ft

Belt Tension.
See
Tune-Up Chart
System Capacities

Refrigerant
R-12

Four-Season
and
Comfortron

Systems.
............
3 lbs., 12 oz.

Universal Systems

Chevrolet, Chevelle,
and
Camaro.
... 3 lbs.

Chevy
n 2 lbs. 8 oz.

All-Weather System
2 lbs. 8 oz.

Compressor
Oil 525
Viscosity

All Systems
11 oz.

Fuses

Comfortron Systems
.

Four-Season Systems
.

Universal Systems
. .

All-Weather System.
.
Fuse

Block

25
amp.

25
amp.

25
amp.

25
amp.
In

Line

30
amp.

30
amp.

20
amp.

20
amp.

SECTION
3

WHEEL ALIGNMENT SPECIFICATIONS (Vehicle
dt
Curb Weight)

Caster*

Camber*

Steering Axis

Inclination

tToe-In (Total)

Wheel Bearing

Adjustment

Preload

End Movement
Chevrolet

Pos.
3/4° ± 1/2°

Pos.
1/4° ± 1/2°

7-1/2° ± 1/2°

@l/8"
to 1/4"

12 ft lbs.

zero

.001"
to .008"
Chevelle •

(SS and El Camino)

Neg. 1/2° ± 1/2°

(All others)

Neg. 1° ± 1/2°

Pos.
1/2° ± 1/2°

8-1/4° ± 1/2°

1/8" to 1/4"

12 ft lbs.

zero

.001"
to .008"
Chevy n

Pos.
1° ± 1/2°

Pos.
1/2° ± 1/2°

7° ± 1/2°

1/4" to 3/8"

12 ft lbs.

zero

.000"
to .004"
Corvette

Pos.
1° ± 1/2°

Pos.
3/4° ± 1/2°

7° ± 1/2°

3/16" to 5/16"

12 ft lbs.

zero

.001"
to .008"
Camaro

Pos.
1/2° £ 1/2°

Pos.
1/4° ±1/2°

8 3/4° ± 1/2°

1/8" to 1/4"

12 ft lbs.

zero

.001"
to .008"

•Must not vary more than 1/2° from side to side.

@Toe-In (Total) should be 5/16" to 7/16" after rebuild using new bushings and ball joints.

tAdjust Toe-in with steering gear on straight ahead location after camber and caster have been set Any change

in caster and camber settings will affect toe; always recheck and set toe to specifications.

LET CHASSIS SERVICE MANUAL

Carburetor
One Barrel
BV
ROCHESTER

Two Barrel
2GV

©
Quadra-Jet Four Barrel
4MV

©

Engine Displacement

(Horsepower)
194
194
230
230
250
250
283

327

(210)
283

327

(210)
283

327

(210)
283

327

(210)
283

327

(210)
283

327

(210)
283

327

(210)
283

327

(210)
327

(275)

350

(295)
327

(275)

350

(295)
396

(325)

427

(385)
(325)

427

(385)
327

(275)

350

(295)
327

(275)

350

(295)
396

(325)

427

(385)
396

(325)

427

(385)

Transmission
Auto
Syn.
Auto.
Syn.
Auto.
Syn.
Auto.
Syn.
Auto.
Syn.
Auto.
Auto.
Syn.
Auto,
Syn.
Auto,
Syn.
Auto.
Syn.
Auto.
Syn.

Part Number
to

•g

Float Level
1-9/32"

3/4"
9/32"

Float Drop
1-3/4"

1-3/4"

Accelerator Pump
1-1/8'
13/32"
Inner Hole

Idle Vent
.050'
3/8'

Fast Idle
Mechanical
3 Turns After Contact

Running
2200
RPM
2000
RPM
2200
RPM
2200
RPM

Carburetor Choke
Rod
90"
.100"
.90"
.100"
.90'
.100'
.060'

.100"

Choke Vacuum Break
140"
160"
.140" .160" .140" .160"

.110"
.120" .110" .120" .110" .130" .110
,130'
160"
.200"
.160" .240'

.160'
.200"
.16(F .240'

Choke Unloader
.350"

.215"
.260"
.300"

.260'
.300"

Thermostat Choke Rod
1/2 to 1 Rod Diameter Interference
1/2 to 1 Rod Diameter Interference

Air Valve Spring
7/8 Turn

Air Valve Lockout
.015"
(Auto. Trans. Only)

Secondary Opening
75%
Min. Contact (Syn. Trans. Only)

Secondary Lockout
.010"
(Syn.
Trans. Only)

Main Meter-

ing
Jet
Primary
059"

.060'
.058"
.059"

.058"
.060"

.052"
.054"

.052"
.054"
.052"

.054'
.052"
.054'
.071'

Throttle

Bore
Primary
1-9/16"
1-7/16"
1-3/8"

Secondary
2-1/4"

Air Valve Dashpot
.015"

With
Air
Injection Reactor System

With
Air
Conditioning

SPECIFICATIONS
12

TUNE UP CHART

E

N

G

I

N

E
Type

Displacement

Horsepower

Compression ®

srp

;•

D

S

R

I

B

TT

T

o

R
Make

0.

Number
Standard

Cold

Gap

Point Dwell

Point Gap

1 ,

Arm Spring Tension

Condenser

T

I

M

j

N

G ®

Drive

Belts
Exc.

A.I.R.

AXR.
Syn.

Auto.

Syn;

Auto.

Fan & P/S

A/C Compressor

A.LR. Pump

Air Cleaner

Valve

Lash

Idle

<§>

Fuel.

Pump
Inlet
Exhaust
<§)

Exc.

A.LR.

A.LR.
Syn.

Auto.

Syn.

Auto.

Pressure

Volume

Crankcase Vent
In Line

153

90
194

120
230

140
250

155

130

AC

AC

31° -
46N

44N

• 34°
V8

283

195

150

AC 45

AC 44
327

210
275
300

160
325
350

150
350

295
396

325

350
427

385

390
400

160

AC 44

AC 43
425
435

150

AC 43N

AC C42N

.035

28° - 32°

.4)16"
(Used) .019" (New)
<

19 - 23 Ounces

4°B

4°B
4°B

4°B

2°B

4°B
4°B

4°B

4°B

4°B
28

- 32 (
yz.

19 - 23 oz.

.18 - .23 Microfarad

4°B

4°B

4°B

4ftB
4°B

4°B

0°B

4°B

50 lb. Min. 75

65 Jh. Min. 95

35 lb..Min. 5£

500
2°B

2°B

2°B

2°B
8PB

8°B

6°B'

6°B
6°B

6°B

6°B

4°A
10°B

X

ib°B

X
10PB

X

10°B

X
4°B

4°B

4°B

4°B
4°B

4°B

4°B

4°B
4°B

4°B

4°B

4°B

± 5 lbs.
(Used):
125 ± 5 lbs. (New) Using Strand '

± 5 lbs.. (Used) 140 ± 5 lbs. (New) Using Strand '

>
± 5 lbs. (Used) 75 ± 5 lbs. (New) Using Strand r

Hydraulic - One Turn Down From Zero Lash

Hydraulic - One Turn Down From Zero Lash

500

X
700*

600*

3 to
700*

500*

4-1/2
500

600
500

500

700*

600*
700

750
500

500

700

500
500

500

700

500
550

550

700

500
4°B

4°B

4°B

4°B
4°B

4°B

4°B

4°B
4°B

4°B

4°B

4°B

Tension Gauge

Tension Gauge

Tension Gauge

550

550

700

550
550

550

700

550
550

550

750

600
10°B
5°B

X

X

.022"

.024"

1000

X

X

X
.024"

.028"

750

X

750

X

5 to 6-1/2

One Pint in 30 - 45 Seconds

Service at 12,000 Miles

OD Psi at cranking speed, throttle wide open - Maximum variation, 20 lbs. between cylinders.

© At idle speed with vacuum advance line disconnected and plugged. A = A.T.D.C.; B = B.T.D.C.

® Paper Element - Service at 12,000 miles initially - Check every 6,000 miles thereafter, until replaced.

Polyurethane - Service every 12,000 miles.

Oil Bath - Change oil at regular engine oil change intervals.

® Mechanical - Set with engine at operating temperature and running.

@ Automatic Transmission - Set idle with transmission in drive.

Air Conditioned Vehicles - Set idle with air conditioning turned "ON" except on specifications indicated by *.

CHEVROLET CHASSIS SERVICE MANUAL

SPECIFICATIONS
21

WHEELS AND TIRES

SECTION 10

CHEVY II

Tire Usage and Recommended Tire Inflation Pressures

Pounds per Square Inch (PSI) Cool

Models

All Models Except

Station Wagon

Station Wagon
Tire

Ply

4 Ply Rating

2 Ply

8 Ply Rating

4 Ply
Tire

Usage

6.95 x 14

6.95 x 14
Standard Inflation Pressure

for all Loads

including Full Rated

1 to 6 passengers

+ 200
lbs. luggage

(1,100 lbs. load)

Front

26**
Rear

26**

1 to 6 passengers

+ 300 lbs. cargo

(1,200 lbs. load)

Front

24
Rear

40
Optional Inflation

Pressure for

Reduced Load

1 to 5 passengers

(750 lbs. load)

Front

24
Rear

24

1 to 5 passengers

(750 lbs. load)

Front

22
Rear

28

•Optional tires are not available.

**Add 2 psi when vehicle is equipped with V-8 engine.

1.
Tire inflation pressures may increase as much as

six (6) pounds per square inch (PSI) when hot.

2.
For continuous high speed operation (over 75

increase tire inflation pressures four (4) pounds per

square inch over the recommended pressures up to

a maximum of 32 pounds per square inch cool for

4-ply rating tires dr 40 pounds per square inch for

8-ply
rating tires. Sustained speeds above 75 MPH

are not recommended when the 4 pounds per square

inch adjustment would require pressures greater

' than the TpaxiTP^Tns stated above.
3.
Cool tire inflation pressure: after vehicle has been

inoperative for three (3) hours or more, or driven

less than one (1) mile.

Hot tire inflation pressure: after vehicle has been

driven ten (10) miles or more at 60-70 MPH.

4.
Station Wagon loads should be distributed as far

forward as possible.

5. Vehicles with luggage racks do not have a load limit

greater than the l,100# load (l,200# load for station

wagons) specified above.

6. When towing trailers, the allowable passenger and

cargo load must be reduced by an amount equal to

the trailer tongue load on the trailer hitch.

CHEVELLE

Tire Usage

Engine and Body Styles

L-6, All styles except Station Wagon

283 V-8, All styles except Station

Wagon, Spt. Sedan and Convertible

283 V-8, Sport Sedan and Convertible

327 V-8 Std., except Sport Sedan

and Convertible

327 V-8 Std., Sport Sedan and

Convertible

327 V-8 H.P., All styles

396 V-8, Pick-Up Delivery

396 V-8, Super Sport Convertible and

2-Door Coupe

All engines, Station Wagon
Standard 14 Inch

With A/C*

7.35

7.75

7.75

7.75

F70

7.75
Without A/C*

7.35

7.35

7.75

7.75

F70

7.75
Optional 14 Inch

With A/C*

7.75

—

-

--

-

7.75

(8-Ply Rating,

4-Ply)
Without A/C*

7.75

7.75

-

—

-

7.75

(8-Ply Rating,

4-Ply)

*A/C (Air Conditioning)

All tires listed are 4-ply rating, 2-ply unless otherwise specified.

CHEVROLET CHASSIS SERVICE MANW

SPECIFICATIONS 23

CAMARO

Tire Usage and Recommended Tire Inflation Pressures

Pounds per Square Inch (PSI) Cool

Models

All Except

Super Sport

Super Sport
1 to 5 passengers

+ 200
lbs. luggage

(950 lbs. load)
Tire Ply

4 Ply Rating-

2 Ply*
Tire Usage

7.35 x 14

D70-14
Standard Inflation Pressure for

all Loads including Full Rated

Front

24**

26
Rear

24**

26

•Optional tires not available.

**Add 2 psi. when vehicle is equipped with 327 V-8

and air conditioning*

1.
Tire inflation pressures may increase as much as

six (6) pounds per square inch (PSI) when hot.

2.
For continuous high speed operation (over 75 MPH)

increase tire inflation pressures four
(4)
pounds per

square inch over the recommended pressures up to

a maximum of 32 pounds per square inch cool for

4-ply rating tires.
3.
Cool tire inflation pressure: after vehicle has been

inoperative for three (3) hours or more, or driven

less than one (1) mile.

Hot tire inflation pressure: after vehicle has been

driven ten (10) miles or more at 60-70 MPH.

4.
Vehicles with luggage racks do not have a load

limit greater than the 950 lbs. load specified above.

5. When towing trailers, the allowable passenger and

cargo load must be reduced by an amount equal to

the trailer tongue load on the trailer hitch.

CORVETTE

Tire Usage and Recommended Tire Inflation Pressures

Pounds per Square Inch (PSI) Cool

Models

All Models
1 to 2 passengers

+150 lbs. luggage

(450 lbs. load)
Tire Ply

4 Ply Rating-

2 Ply*
Tire Usage

7.75-15*
Standard Inflation Pressure for

all Loads including Full Rated

Front

24
Rear

24

•Optional tires are not available.

1.
Tire inflation pressures may increase as much as

six (6) pounds per square inch (PSI) when hot.

2.
For continuous high speed operation (over 75 MPH)

increase tire inflation pressures four
(4)
pounds per

square inch over the recommended pressures up to

a maximum of 32 pounds per square inch cool for

4-ply rating tires.
3.
Cool tire inflation pressure: after vehicle has been

inoperative for three (3) hours or more, or driven

less than one (1) mile.

Hot tire inflation pressure: after vehicle has been

driven ten (10) miles or more at 60-70 MPH.

4.
Vehicles with luggage racks do not have a load limit

greater than the 450# load specified above.

5. When towing trailers, the allowable passenger and

cargo load must be reduced by an amount equal to

the trailer tongue load on the trailer hitch.

CHEVROLET CHASSIS SERVICE MANUAL