Page 64 of 386

Downloaded from www.Manualslib.com manuals search engine Engine  Power  Switch (ZR-1) 
The LT5  engine  in your 
ZR-1 has two  sets of 
intake  runners and  fuel 
injectors.  The  primary set 
can  be  run  alone  for 
normal  engine  power, or 
both  sets can be used  for 
full  engine  power. 
Full  power  gives  you  extra power  for highway touring 
and  off-road  sports  use  and reserve  power for passing. 
With  normal  power,  you’ll notice less  engine and 
exhaust  noise.  To 
change  the  power setting,  put your  engine  power  key 
into  the  switch.  Turn the key  to  the setting 
you want  and 
let  go.  The  key  will  return to the  center  position. 
Your  ZR-1  is  able to run  at full  power  under  the 
following  conditions: 
0 The  engine  coolant  and oil  temperatures  are  greater 
than 
68°F (20°C) but  less  than 302°F (150°C). 
System  voltage is greater  than  ten  volts. 
The SERVICE  ENGINE SOON light  is  not  on. 
You can switch  the  setting  at  engine  speeds  up to 
4,000 rpm.  When  you select the FULL  setting,  a  light 
near  the switch  will come  on. 
It should  go  out when you 
change  back  to  the  NORMAL setting.  When  you turn 
the  ignition  off,  the  setting  will  go back  to  normal 
power. 
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        Page 123 of 386

Downloaded from www.Manualslib.com manuals search engine Malfunction  Indicator Lamp (Service 
Engine  Soon  Light) 
SERVICE 
0 
SOON 
I 
A computer monitors 
operation 
of your fuel, 
ignition and emission 
control systems.  This amber 
light should come  on when 
the ignition  is on, but the 
engine  is not running, as a 
check  to show you it  is 
working. 
If  it  does  not come 
on at all, have  it fixed right  away.  If 
it  stays  on,  or it comes on while you  are driving, the 
computer  is indicating that you have 
a problem. You 
should  take your vehicle  in  for service soon. 
NOTICE: 
If you  keep driving your  vehicle  with  this  light  on, 
after 
a while  the  emission  controls  won’t  work as 
well,  your  fuel  economy  won’t  be as good and your 
engine  may  not 
run as smoothly. This could  lead  to 
costly  repairs  not  covered  by  your  warranty. 
Engine  Oil  Pressure  Gauge 
-1 
OIL 
PRESS 
PSI 
The  engine  oil pressure gauge shows the  engine 
oil  pressure in  psi (pounds  per  square  inch)  or 
kPa (kilopascals) when  the engine is  running. Oil 
pressure  should be 
20 to 80 psi (140 to 550 Ea).  It 
may  vary with engine  speed, outside  temperature  and  oil 
viscosity,  but  readings above the shaded  area  show  the 
normal operating range. Readings in  the  shaded  area tell 
you  that the engine  is low  on  oil, or  that  you might  have 
some other  oil problem. See “Engine  Oil”  in  the  Index. 
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        Page 124 of 386
Downloaded from www.Manualslib.com manuals search engine NOTICE: 
Damage  to  your  engine  from  neglected  oil 
problems  can  be  costly  and 
is not  covered  by  your 
warranty. 
Engine Oil Temperature  Gauge 
LT1 LT5 
This  gauge shows your  engine  oil  temperature.  Oil 
temperature  may  vary with the type 
of driving  you do 
and  weather  conditions.  If your gauge  pointer  moves 
close  to  or  into  the  shaded area and stays  there,  your  oil 
temperature  is  too  high. Check the  engine  coolant 
temperature and  engine  oil  level. If your  engine  is  too 
hot,  see  “Engine  Overheating”  in  the Index.  Your 
vehicle  may  need  service;  see  your dealer. 
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        Page 125 of 386
Downloaded from www.Manualslib.com manuals search engine I 1=1 1 I -1 I 
r . 
For numeric gauge measurements, press the GAUGES 
button  on the Trip Monitor until OIL appears.  The 
number that appears next to the  fuel gauge  is the  oil 
temperature. 
If LO  appears, the temperature is below 
32°F (OOC). 
System  Problems 
If SYS flashes on the  display  near your fuel  gauge, 
there  may be a problem  with your  Corvette’s  electrical 
system.  If the amber SECURITY light  flashes at the 
same time, there 
is a problem  with  your  theft-deterrent 
system. Have your  vehicle checked  by  your  dealer 
if 
SYS keeps appearing. 
Gauge  Markings 
The analog gauges provide a quick  visual  reference  to 
the actual measurements  of these  gauges.  However,  you 
must keep  in mind that the gauges  aren’t  linear. This 
means  that  the  middle mark is not  a temperature  halfway 
between  the top and bottom  temperatures on the  gauge. 
For your convenience,  the following  table  gives  the 
exact reading for each  mark.   
     
        
        Page 126 of 386
Downloaded from www.Manualslib.com manuals search engine Fuel Gauge 
For numeric gauge measurements, refer  to the digital 
readings  by pressing  GAUGES on the 
Trip Monitor. 
Marking 
Gauge 
E D C B A 
LT1 Oil 100 
260 
235 
210 
185 100 Coolant 
280 250 
220 
190 
100 LT5 Oil 
320 285 
250 
21 5 Temperature 
Temperature 
Temperature 
CF 
Your  fuel  gauge  shows about  how much  fuel  is  in  your 
tank.  The bars light up when the ignition  is on  or,  if the 
ignition  is off, when 
you turn on your parking  lamps. 
When  the display 
is down to the last  two bars, 
RESERVE  will appear next to the gauge. 
Here 
are three concerns some owners  have had about  the 
fuel  gauge. All these situations 
are normal  and  do not 
indicate that anything  is wrong  with the  fuel  gauge. 
At the  gas station, the  fuel pump shuts off before  the 
gauge reads 
FULL (F). 
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        Page 128 of 386

Downloaded from www.Manualslib.com manuals search engine It’s normal  for the  transmission fluid  temperature  to 
vary,  depending on  the type  of driving  you do and 
weather  conditions.  If you  drive  on  long  grades  on  a hot 
day,  the  transmission fluid temperature will  be higher 
than  normal driving  on a cold  day.  If  you drive  your 
Corvette at  high speeds with a lot  of stop-and-go  or  fast 
accelerations, your transmission fluid  temperature may 
also be  higher. 
If  the transmission fluid  exceeds 
280°F (138 “C), the 
CHECK  GAUGES  light will come on and HI 
AUTO 
will be displayed  next to the transmission  fluid 
temperature  when  you toggle through  the GAUGES 
button.  You should  move the shift lever  to  DRIVE (D) 
and  continue driving  at a slower,  constant  speed. 
Monitor the transmission  fluid temperature and  allow 
it 
to cool to 180°F (82°C) to 200°F (93°C). Then, you 
should  check the transmission  fluid  level  for a low fill  or 
overfill  condition  and bring your  Corvette  in  for  service 
as  soon  as possible (see “Automatic Transmission  Fluid” 
in  the Index). Also, check the  engine  coolant 
temperature.  If  it’s too hot, see “Cooling System”  in the 
Index. 
Check  Gauges  Light 
This  red light  will come  on 
briefly when  you are 
starting  the  engine.  If the 
light  comes on and  stays  on 
while 
you are  driving,  check 
your gauges  to  see if they 
are 
in the warning  areas. 
This  light  can come 
on for: 
0 high  engine oil temperature  or  low  oil  pressure 
high coolant  temperature 
high or low battery voltage 
0 low fuel  level 
0 high automatic  transmission oil  temperature 
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        Page 129 of 386
Downloaded from www.Manualslib.com manuals search engine Low Oil  Light 
LOW 
OIL 
T 
This amber light should 
come  on  while you  are 
starting your engine. 
If the 
light doesn’t come  on,  have 
it  repaired. 
If the light 
comes  on  while  starting 
your engine and stays on, 
your engine oil level  may be 
too low. You may need to 
add oil.  See “Engine Oil” in 
the Index. 
Engine  Oil  Life  Monitor 
The amber CHANGE OIL 
light comes  on  for  a few 
seconds when  you  turn  the 
ignition 
on. It  will  come on 
and stay  on when  it’s  time 
to  change your  oil. 
The monitor uses  oil temperature and  engine  revolutions 
to decide  when the oil  is  nearly  worn  out.  The light is 
only  a  reminder,  though. 
You should  change  your oil at 
the intervals recommended in your Maintenance 
Schedule, even  if the 
CHANGE OIL light  hasn’t  come 
on. 
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        Page 250 of 386
Downloaded from www.Manualslib.com manuals search engine RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS 
FOR BEST  FUEL  ECONOMY AND COLD STARTING, SELECT THE LOWEST 
SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE MNGE. 
HOT 
WEATHER 
LOOK 
FOR THIS 
SYMBOL 
-- 1-J SAE 1OW-30 
SAE 5W-30 PREFERRED 
COLD 
WEATHER 
DO NOT USE SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED 
SAE 5W-30 
As shown  in the  viscosity chart,  SAE 5W-30 is best 
for  your vehicle. However,  you can 
use SAE 
1OW-30 if  it’s  going  to  be 0°F (-1S.OC) or  above. 
These numbers  on an 
oil container show  its viscosity, 
or  thickness. 
Do not use other viscosity  oils such  as 
SAE 
20W-50. 
Oils meeting  these 
requirements  should  also 
have the  “Starburst”  symbol 
on the container. 
The  “Starburst” symbol indicates that  the 
oil has been 
certified by the American Petroleum  Institute  (API), and 
is preferred for your  gasoline  engine. These  oils  may 
also  be  identified 
as API SH. 
6-15