
Downloaded from www.Manualslib.com manuals search engine SECTION 2 
STARTING AND OPERATING 
ENGINE EXHAUST GAS CAUTION 
(CARBON MONOXIDE) 
Do not breathe  exhaust  gas becau~ it contains  carbon monoxide,  which by itself 
- has  no color or odor.  Carbon  monoxide is a dangerous  gas . .It can  cause 
un consc iousness  and can 
be lethal. 
If at any time  you think that exhaust  fumes are entering the vehicle.  have the cause determined  and corrected  as soon· as  possible.  If you  must  drive  under  these 
conditi<:ms, drive only with ALL windows  fully OPEN. 
Prptect 
against  carbon  monoxide  entry ihtp the vehicle  body. The best way is to 
keep  the engine -exhaust  system, vehicle 
body. and body ventilation  system 
properly maintained. We  recommend  that the exhau st  system  and body be "inspected by a competent mechanic:  ' 
• each time  the vehicle is raised  for an oil change; 
• whenever  a change is noticed  in the',sound ofthe~exhaust system; 
• wh enever  the exhaust  sys.tem. underbody . or rear of the vehicle is damaged. 
See your  Maintenan ce  Schedule fo.~4er for  parts  requiring  inspection . 
To allow proper  operation of the vehicle's  ventilation  system, keep the air  inlet 
grill e 
in front of the win(fshield clear  of  snow,  leaves  or  other  obstru ctions  at all 
times. 
SITTING IN A PARKED VEI:iICLE WITH THE ENGINE RUNNING FOR A LONG TIME IS NOT RECOMMENDED. 
Do n ot fun , the engine in co nfined  areas (such as garages or next to a building) 
any  more than  needed  to move  the vehicle. When the, vehicle is stopped in  an 
UNCONFINED area  with the engine  running for any, more  than a sho rt time, tak e the  following steps: 
A.  Adju st  the  heating  or  cooling  system to force  outside air into the vehicle  as 
follows: 
1. On cars not equipped  with air co nditioning . se t the fan  to  medium or 
high  speed. 
2. On cars  equipped  with air conditioning, serthe fan to medium  or high 
spe ed 
a!1;d right  hand  control  lever' to  any  position  except "orr' or ·'Max." 
-B. Keep  the exhau st  tailpipe -area  clear of snow  and other  material to help"reduce 
the  buildup of exhaust  gases' under  the vehicle . 
The ,trunk  lid or hatchba ck  should  be closed  while driving  to help  prevent  drawing 
exhaust  gas into 
the car. If the trunk lid  or  hatchback mu st' remain  open for some 
rea son while  moving , or 
if electrical  wiring or other cable conn_ection s to a trai ler 
_mu st pass  through  the sea l between  the trunk  lid or hatchba ck  and -the  body . follow 
thes e precautions: 
• Close  all wind ows. 
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Downloaded from www.Manualslib.com manuals search engine SECTION 4 
APPEARANCE CARE 
CAUTION: Some cl .. n .... may be poi8Of10ua or flammable, and their  improper UH may  cau .. per.,nal Injury or damage the inside of the vehicle. Therefore, when cleaning the inside of the vehicle. 00 NOT USE volatile  cleaning solvents such as: 
acetone.  lacquer thinnere.  enamel reducers. nail polish removers; or such cl •• ning 
materials •• 'aundry soaps.  bleach .. or reducing  agents except as noted  In the fabric cteenlng advice on stein removal that ~Iowa. . NEVER UH carbon  tetrachloride, paolin., benzene or naphtha  for any cleaning purpose. 
Overexposure to the .. vapors may .... ult!n II health problem. This is even more likely to occur In small.  unventilated .~. It is recommended that all vehicle  doors 
be  opened for ventilation when any cleaning  agents or other chemicals  are uNCI in the interior. Approved  respiratory  protection equipment may be nMded. Follow the manufacturer's advice whenever cleaning agents or other chemicals  are used, 
Inside or outside the vehicle. 
NOTICE: To avoid pouible permanent  discoloration of white or light colored nata. DO NOT let materlala with unstabl. dyes come In contact with seat trim materials until the trim meterlals are totally dry. (This would Include certain types of casual 
clothing. such a8 colored  denims.  corduroys.  leathers and suedes: also decorative paper, etc.) 
CARE AND CLEANING  OF INTERIOR TRIM 
With the use of modern trim materials,  it is VERY IMPORTANT that proper 
cleaning  techniques 
and cleaners be used. Failure to do this on the first cleaning 
may  result 
in water  spots,  spot rings, or setting of stains or soilage,  all of which 
make it more  difficult to remove in a second  cleaning. 
The portions of the following  cleaning instructions that are in BOLD TYPE are especia11y important and MUST be performed. 
Dust and loose dirt that accumulate  on interior  fabrics should be removed  often 
with  a vacuum  cleaner or soft brush.  Vinyl or leather trim should be wiped 
regularly with a clea:1 damp cloth. Normal trim soilage,  spots, or stains can be cleaned  with these GM cleaners: 
Description 
G.M. Spot Lifter  8 oz.  (.237L) Solvent Type 
G.M.  Multi-Purpose Powdered Cleaner 
G.M. Part No. 
1051398 
6 
lb. (2.72  Kg) Foam  Type 1050429 The above products are excellent cleaners when used property. 
They are available through your Authorized dealer. 
Remember these basic staps before claaning : 
1. Remove  stains as quickly  as possible before they become "set." 
2. Use a clean  cloth or sponge, and change to a clean  area often. (A SOFT brush 
may 
be used if stains  persist.) 
3. 
Use solvent  type cleaners  only in a well  ventilated  area; also, do not saturate 
the stained area. 
4-1   

Downloaded from www.Manualslib.com manuals search engine On all C-4 cars, a "CHECK ENGINE" light on the instrument panel  is 
designed to come on during engine starting , to let you know the bulb is working. (The light will stay on a short time after the engine starts.) If the light comes on while  driving,  service to the emission control system 
may be required. See your Chevrolet  dealer' as soon as possible for an inspection of the system. Continued driving without having the C-4  System  serviced _ could eventually 
cause  damage 
to the emission control system . It could also affect fuel 
e conomy and drivabili -ty. 
ENGINE OIL AND FILTER RECOMMENDATIONS • Engine oils' are  labeled  on 'the  containers  with various API (American 
Petroleum  Institute) designations 6f quality. Use engine oils that are labeled 
5E or SE/CC. Do  not use  oils  labeled  only SA, 5B, 5C,  SD,  CA,  CB, CC or CD; _or oils with  the combination  label SE and CD (SE/CD). Higher 
quality oils labeled SF will be introduced  soon (late 1979, or 1980). These SF oils are preferred and should be used  when  available. 
• The oil and filter change  intervals  for your  engine  are based on the  use of SE-quality or SF-quality  oils and  ,high- quality  filters such as AC oil filters. Using oils  other  than SE-quality or SF-quality oils, or oil change  intervals 
longer  than recommended.  could reduce -engine  life and  might  affect your 
warranty. 
•  Your engine  was filled  with a high·quality  engine oil when it was  built. You do ,not  have  to change  this oil before  the suggested  change period. 
• 
If your  normal  driving  does nQt include  one or more of the four "severe service" conditions  listed below.  change  the oil every 7,500 miles (12 000 ' kilometers) or 12 months,  whichever  comes first. Change the oillilter at the 
first oil change.  then every  second  oil change, if mileage  (7,500 miles or 12 
000. kilom~ters) determines .w ,hen  you change  the oil. If _time (12  months) 
determines  when you change  the oil, change the  filter with every  oil change. 
• Change  the oil and  oil filter  every 3,000 miles  (4 800  kilometers) , or three 
months  if you often drive under one or more of these 'severe service·,~. 
conditions: • Driving  in dusty  areas 
• Towing ,3 trailer 
• Frequent  idling or idling for long  periods 
• Driving 4 miles (6 kilometers) br'less  in freezing weather,o~other short trips in cold weather, where  the engine  does not thoTough ,ly warm up. 
• Change the oil and  oil filter as soon  as -possible  after driving in a dust 
storm. 
Oil Viscosity 
Engine oil viscosity  (thickness)  has an effect  on fuel  economy. Lowec viscosity 
engine  oils can  provide  increased , fuel " economy;  however, higher temperature 
weather conditions  require higher viscosity  engine oils for satisf~ctory lubrication. 
To. get  the best fuel  economy  with your-1980  Chevrolet, -iou should  use -,, ' . 
fuel. 'saviiJ.&:_engine oil ohhe_ proper viscosity. These oils call_ be  found. in serviCe 
stations and other retail  stores. They are-identified  by words  such as: "Energy Saving,"  "Conserves Gasoline," "Gas Saving,"  "Gasoline  Saving," '''Friction 
Reducing," "Improved Gasoline  Mileage" or "Fuel Saving." 
The following  chart lists the engine ' oil viscosities recommended  for the 
temperature  range you expect  before the next oil change. For lemperalures  above ,_18°C (O"F),SAE lOW-30 is  -the preferred  viscosity grade. Ircold-weather starting 
problems 
are encountered  at temperatures  below -lSoC (
5-3   

Downloaded from www.Manualslib.com manuals search engine 3. Stop the engine. Open the radiator drain valve to drain the  coolant.  (Drainage 
may  be speeded  by removing the drain  plugs in the  block.) 
4. Close  the drain  valve (install  block drain plugs,  if removed). Add water  until 
the  system  is filled and run the engine  until the upper  radiator  hose is hot again. 
5. Repeat  steps 3 and 4 several  times until the drained  liquid is nearly  colorless. 
6. Drain the system and then  close  the radiator drain  valve tightly.  (Install  block 
drain  plugs, if removed.) 
7. Disconnect  all hoses from the coolant  recovery  tank. Remove  the tank and 
pour out any fluid. Scrub and clean the inside of the tank with  soap and water. 
Flush  it well  with  clean  water, 
then drain  it. Reinstall  the tank and hoses. 
8. Add enough  water and ethylene  glycol antifreeze  (meeting GM Specification 
1899-M)to provide the required cooling, freezing, and corrosion  protection. Use a solution that is at least 50 percent antifreeze, but no more than 70 
percent  antifreeze. Fill the radiator  to the base of the filler neck and fill the 
coolant  recovery 
tank to the "Full Hot" mark. Put the recovery tank cap  back 
on. 
9. Run the  engine,  with the radiator cap removed,  until the upper  radiator  hose 
is  hot. 
10. With  the engine  idling, add coolant to the radiator  until it reaches  the bottom 
of the filler  neck.  Install  the radiator  cap, making sure the  arrows on the cap line  up with  the overflow.  tube. 
It is the owner's responsibility  to: 
• Maintain cooling system freeze protection  at _37°C (_34°F) to ensure 
protection  against corrosion and loss of coolant  from boiling. (A SO/50 
mixture of water and ethylene  glycol antifreeze will provide  freeze protection 
to ~ 37°C ore -34°P.) You should  do this  even if you don't expect  freezing 
temperatures. 
• Add ethylene  glycol base antifreeze that meets GM Specification  1899-M 
when  antifreeze 
hasto be added  because of coolant  loss or for more  protection 
' against  freezing  at temperatures  lower than _37°C (-·J4°P). 
NOTICE: Do not use alcohol or methanol-base antifreeze. or plain water alone. in your vehicle at any time. They will boil at a lower pOint than that at which the hot light indicator (or temperature gage) works. and they do not provide proper protection against corrosion. 
Radiator Pressure Cap 
The radiator  cap, a 105 kPa(15 psi) pressure  type, must be installed  tightly, 
otherwise  coolant may be lost and damage to engine  may result  from overheating. 
Radiator  pressure caps should  be checked  periodically  for proper  operation. 
If 
replacement is required, an AC cap is recommended. 
Thermostat 
The engine  coolant  temperature  is controlled  by a thermostat. It stops  coolant  flow 
through  the radiator  until a preset  temperature is reached.  This thermostat is 
installed  in 
the engine coolant  outlet on the  engine  block. The same thermostat is used in both winter  and summer.  When a replacement is needed, AC~Delco parts 
are  recommended. 
5-7   

Downloaded from www.Manualslib.com manuals search engine CAUTION: If the air cleaner is removed during repair or maintenance, be sure to . put It back on correctly. If the air cleaner is not correctly installed, there could be II fire In the engine compartment (if there should happen to be a backfire), or other engine malfunction. 
Power Steering System 
Check the 'fluid level in  the  power  steering  pump at each  engine  oil change.  Add GM :Power  Steering  Fluid, (Part  Number GM 1050017) as needed: 
, • Ifnuid is warmed  up (abo ut 66°C or lSO"F --hot  to the  to uch),  the fluid  level 
should be between  the "Hot" and "Cold" marks on the  filler  cap indicat or. 
• If cool  (about 21°C or 70° F), the  fluid level should  be between  the "Add" and "Cold" marks. 
This  fluid 
does not need ' periodic changing. 
Freedom Battery 
Your new  vehicle  has a Delco FREEDOM battery. It needs  no periodic 
maint enance . Its 
lOp is permanently  sealed (except  for two small  vent holes)  and 
has  no filler  caps. You will never  have to add  water. . 
The hydrometer  (test indicat or)  in  the top of the  battery  provides  information  for 
testing  purposes  only. 
For full power  needs at repla cement  time, a Delco  battery  with ,the  same  catalog 
number  as shown  on the  original  banery's  label 
is recommended. 
CAUTION: FoUow the precautions  listed in the Jump Starting Cautton {see the "'n Case of Emergency''' section o"f this manual, when working on or near the battery. 
Personal injury (particularly to eyes) or property damage may result from battery explosion, battery acid, or electric.1 (short circuit) burns. 
Hood latches and Hood Hinge 
At  the  interval  shown  in the  Maintenance  Schedule lubricate  hood  latch assembly 
and  hood  hinge  assembly  as follows : 
1 .  Wipe  off any  accumulation 
of dir.t or contamination  on latch  parts. 
2.  Apply  Lubriplate or equivalent  to latch  pilaf bolts and latch loc king 
plate . 
3. Apply  light engine  oil to all pivot  points  in release  mechanism,  as well 
as  primary 
and secondary  latch mechanisms. 
5-9   

Downloaded from www.Manualslib.com manuals search engine TIRE INFORMATION 
Wheel Nut Torque ................. 140 N'm (100 ft. Ibs.) 
Complete 
tire information will be  found  in Section 5. 
ENGINE SPECIFICATIONS 
TYPE 
AND PISTON 
COM-
NO . OF  DISPLACE· 
CARBUR-PRESSION 
CYL. 
MENT ETOR  RATIO 
BORE STROKE 
L4  2.5 L  2 8.25,1 
101.6mm 76.2mm 
V6  2.8 L 2 8.5'1 89mm 76mm 
L4 Firing Order 1-3-4-2 
V6 Firing Order 1-2-3-4-5-6 
REPLACEMENT  PARTS 
SPARK PLUGS 
The following spark plugs are recommended for your eng'ine 
Englne Norma~ ~rvlc.~ 
L4 AC Type R43TSX 
V6 AC Type R44TS 
RECOMMENDATIONS  FOR FILTERS 
ITEM USAGE RECOMMENDATION 
Engin'e Oil Filter 2.5  L4 Engine ACType PF40 2.8 V6 Engine AC TYDePF51· 
Engine Air 2.5  L4 Engine AC Type  A734C Cleaner -Element 2.8 V6 Engine AC Type  A735C 
Carburetor 2.5 L4 Engine AC Type GF470 Fuel Filter 2.8 V6 Engine AC Type  GF471 
Positive  Crankcase 2.5 L4 Engine AC Type  CV795C Ventilator  Valve 2.8 V6 Engine AC Type  CV789C Canister Filte.r 2.5 L4 Engine GM 7026014 2.8  V6 Engine GM 7026014 
I 
*The larger PF·5lbil filter  is tO,be used in place of the engine oil filter originally  installed on your car. 
7-2