Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1990LUMINA APV V6-191 3.1LREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTCOOLING SYSTEMLOCATIONS
1990 Chevrolet Lumina APV V6-191 3.1L
Cooling System: Locations
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Locations
MAKE BLEED W/
MODEL BLEEDER FILL ENGINE SPECIAL
ENGINE TYPE LOCATION POINT @ RPM NOTICE
GENERAL MOTORS
1983-92 caps radiator & thermo - Fill through
All 4-cyl. 1.8L, thermostat thermostat housing
2.0L OHC; 2.5L housing until coolant reaches
W/thermostat top of radiator neck.
twist cap Recheck cold
1984-85 FIERO caps radiator & thermo 2000 Fill through
thermostat thermostat housing
housing until coolant reaches
top of radiator, replace caps. Run engine for three minutes and then fast idle for 15-20 seconds. Top off through thermostat housing
1986-88 FIERO caps radiator & radiator off Fill cooling
thermostat system through
housing radiator until full.
Replace cap and run engine until warm. Add coolant through thermostat housing as needed
1987-89 V6 2.8L valve thermostat radiator off With high-mounted
FWD ex. Century, housing by-pass hose (above
Celebrity, Ciera, radiator), also
6000 remove hose from
pipe
1986-87 V6 3.0L, hose heater radiator 3000 Rev to 3000 RPM
3.8L Electra, outlet & top off
LeSabre, 88, 98,
Bonneville
1989-92 V6 3.1L valves 1. thermostat radiator off Close valves when
ex. Century, housing coolant flows from
Celebrity, 2. throttle vent, continue filling,
Ciera, 6000 body idle engine to
return operating
pipe temperature and top
off
1991-92
V6 3.4L valves 1. thermostat radiator off Fill through
housing radiator neck until
2. heater full. Allow system to
inlet stabilize and add
pipe coolant as needed.
Install radiator cap and close air bleeds. Fill coolant reservoir to proper level
1988-91 - - radiator - With AC on, rev
V6 3.8L Code C, engine to 3000 RPM
1989-90 V6 3.3L at least five times to
purge trapped air
1991-92 3.8L plug thermostat radiator idle Turn AC on, temp.
Code L, 1 housing on high. Rev engine
to 3000 rpm five times and slowly open air bleed
1992 5.7L
Code P screw 1. thermostat radiator off -
Corvette housing
2. throttle
body
Cadillac, all - - radiator - Run engine at
FWD V8 2000 rpm for 10
minutes with cap off
MODEL BLEEDER FILL ENGINE SPECIAL
ENGINE TYPE LOCATION POINT @ RPM NOTICE
GENERAL MOTORS
1983-92 caps radiator & thermo - Fill through
All 4-cyl. 1.8L, thermostat thermostat housing
2.0L OHC; 2.5L housing until coolant reaches
W/thermostat top of radiator neck.
twist cap Recheck cold
1984-85 FIERO caps radiator & thermo 2000 Fill through
thermostat thermostat housing
housing until coolant reaches
top of radiator, replace caps. Run engine for three minutes and then fast idle for 15-20 seconds. Top off through thermostat housing
1986-88 FIERO caps radiator & radiator off Fill cooling
thermostat system through
housing radiator until full.
Replace cap and run engine until warm. Add coolant through thermostat housing as needed
1987-89 V6 2.8L valve thermostat radiator off With high-mounted
FWD ex. Century, housing by-pass hose (above
Celebrity, Ciera, radiator), also
6000 remove hose from
pipe
1986-87 V6 3.0L, hose heater radiator 3000 Rev to 3000 RPM
3.8L Electra, outlet & top off
LeSabre, 88, 98,
Bonneville
1989-92 V6 3.1L valves 1. thermostat radiator off Close valves when
ex. Century, housing coolant flows from
Celebrity, 2. throttle vent, continue filling,
Ciera, 6000 body idle engine to
return operating
pipe temperature and top
off
1991-92
V6 3.4L valves 1. thermostat radiator off Fill through
housing radiator neck until
2. heater full. Allow system to
inlet stabilize and add
pipe coolant as needed.
Install radiator cap and close air bleeds. Fill coolant reservoir to proper level
1988-91 - - radiator - With AC on, rev
V6 3.8L Code C, engine to 3000 RPM
1989-90 V6 3.3L at least five times to
purge trapped air
1991-92 3.8L plug thermostat radiator idle Turn AC on, temp.
Code L, 1 housing on high. Rev engine
to 3000 rpm five times and slowly open air bleed
1992 5.7L
Code P screw 1. thermostat radiator off -
Corvette housing
2. throttle
body
Cadillac, all - - radiator - Run engine at
FWD V8 2000 rpm for 10
minutes with cap off
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.