Page 140 of 402

Downloaded from www.Manualslib.com manuals search engine Have you recently changed brands of fuel?
If
so, be sure to fuel your vehicle with quality fuel (see
“Fuel” in the Index). Poor fuel quality will cause your
engine not to run as efficiently as designed. You may
notice this as stalling after start-up, stalling when you
put the vehicle into gear, misfiring, hesitation on
acceleration or stumbling
on acceleration. (These
conditions may
go away once the engine is warmed up.)
This will be detected by the system and cause the light
to turn on.
If you experience this condition, change the fuel brand
you
use. It will require at least one full tank of the
proper fuel to turn the light
off.
If none of the above steps have made the light turn off,
have your dealer or qualified service center check the
vehicle. Your dealer has the proper test equipment and
diagnostic tools to fix any mechanical
or electrical
problems that may have developed.
Engine Oil Pressure Gage
5.7L LT1 Engine 3800 L36 Engine
This gage tells you if there could be a problem with your
engine oil pressure.
The engine oil pressure gage shows the engine oil
pressure in psi (pounds per square inch)
in the United
States, or kPa (kilopascals)
in Canada, when the engine
is running. Oil pressure should be
20 to 80 psi (140 to
550 kPa). On the 3.8L engine, the oil pressure should be
between
20 and 120 psi (140 to 827 kPa). It may vary
with engine speed, outside temperature and oil viscosity,
2-85
Page 263 of 402

Downloaded from www.Manualslib.com manuals search engine When to Add Oil
If the oil is at or below the ADD line, then you’ll need
to add some oil. But you must use the right kind. This
part explains what kind of oil to use. For crankcase
capacity, see “Capacities and Specifications” in
the Index.
I NOTICE:
Don’t add too much oil. If your engine has so
much oil that the oil level gets above the
cross-hatched area that
shows the proper
operating range, your engine could be damaged.
The oil fill cap is located on the valve cover near the
oil dipstick.
Just fill it enough to put the level somewhere in the
proper operating range. Push the dipstick all the way
back in when you’re through.
What Kind of Oil to Use
Oils recommended for your vehicle can be identified by
looking for the “Starburst” symbol. This symbol
indicates that the oil has been certified by the American
Petroleum Institute (API).
Do not use any oil which
does not carry this Starburst symbol.
If you change your own oil,
be sure you use
oil that has
the Starburst symbol on the
front of the oil container. If
you have your oil changed
for you, be sure the
oil
put into your engine is
American Petroleum
Institute certified for
.. --v- I gasoline engines.
You should also use the proper viscosity oil for your
vehicle, .as shown in the following chart:
6-12
F
Page 264 of 402
Downloaded from www.Manualslib.com manuals search engine I RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS ~ ~~~~~~
FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST
SAE VISCOSITY GRADE
OIL FOR THE EXPECTED TEMPERATURE RANGE.
HOT
WEATHER
I
I LOOK
FOR MIS
SYMBOL ~
SAE 1OW-30
‘-30 REO
COLD
WEATHER
I
DO NOT USE SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED
5.7L LT1 (Code P)
As shown in the chart, unless you have the 3.8L engine,
SAE 5W-30 is best for your vehicle. However, you can
use SAE 1OW-30 if it’s going to be 0°F (-lS°C) or
above. These numbers on an oil container show its
viscosity,
or thickness. Do not use other viscosity oils,
such
as SAE 20W-50.
6-13
Page 265 of 402

Downloaded from www.Manualslib.com manuals search engine I RECOMMENDED SAE VISCOSITY PRADE ENGINE OILS
FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST
I SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE.
L
HOT
WEATHER
/OF ‘C‘
+loo- - +3a
-
+EO- - +27
+60--+16
+40- - +4
+20---7
0---la
COLD
WEATHER
DO NOT USE SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED
3800 L36 (Code K)
As shown in the chart, if you have the 3.8L engine,
SAE 1OW-30 is best for your vehicle. However, you can
use
SAE 5W-30 if it’s going to be colder than 60°F
( 16°C) before your next oil change. When it’s very cold,
you should use
SAE 5W-30. These numbers on an oil
container show its viscosity,
or thickness. Do not use
other viscosity oils, such as
SAE 2OW-50.
Use only engine oil with the American
Petroleum Institute Certified For Gasoline
Engines “Starburst” symbol. Failure to use the
recommended oil can result in engine damage not
covered by your warranty.
GM Goodwrench’ oil meets all the requirements for
your vehicle.
6-14 -
Page 371 of 402

Downloaded from www.Manualslib.com manuals search engine Part D: Recommended Fluids and
Lubricants
NOTE: Fluids and lubricants identified below by name,
part number ‘or specification may be obtained from your
GM dealer.
USAGE
Engine Oil
Engine Coolant
FLUID/LUBRICANT
Engine oil with the American
Petroleum Institute Certified For
Gasoline Engines “Starburst”
symbol
of the proper viscosity. To
determine the preferred viscosity
for your vehicle’s engine, see
“Engine Oil” in the Index.
50/50 mixture of clean water
(preferably distilled) and
GM
Goodwrench@ DEX-COOL TM or
(orange-colored, silicate-free)
antifreeze conforming to
GM
Specification 6277M. See “Engine
Coolant” in the ‘Index.
Havoline@
DEX-COOL
USAGE
Coolant
Supplement
Sealer
Hydraulic Brake System
Hydraulic Clutch System
Power Steering System
Manual
Transmission
Automatic
Transmission
Key Lock
Cylinders
FLUIDLUBRICANT
GM Part No. 3634621 or
equivalent with a complete flush
and refill.
Delco Supreme
11 @ Brake Fluid
(GM
Part No. 1052535 or
equivalent DOT-3 brake fluid).
Hydraulic Clutch Fluid (GM
Part
No. 12345347 or equivalent).
GM Power Steering Fluid
1050017
- 1 st., or equivalent).
.DEXRON@-m Automatic
Transmission Fluid.
DEXRON@-III Automatic
Transmission Fluid.
Multi-Purpose Lubricant, Superlube@
(GM Part No. 12346241
or equivalent).
(GM Part NO. 1052884 - 1 Pt.,
7-44