catalytic converter GMC SIERRA 1995 Owners Manual

Three- Way Catalytic Converter (Gasoline Engines)
Your vehicle’s three-way catalytic converter is designed to reduce the
pollutants
in your vehicle‘s exhaust. Use only unleaded fuel in your vehicle.
If you use leaded fuel, you could damage your three-way catalytic converter
and other engine components.
Oxidation Catalytic Converter (Diesel Engines)
Your vehicle’s oxidation catalytic converter is designed to reduce the
particulates
in your vehicle‘s exhaust. If your vehicle’s oxidation catalytic
converter ever needs to be replaced,
it must be replaced with an oxidation
converter intended for use
with diesel engines only.
Engine Control Module System
Gasoline Engines
This system has an oxygen sensor (OS) that helps keep your engine’s
air-fuel mixture at a proper level. Use only unleaded fuel in your vehicle. If
you use leaded fuel, you could damage your oxygen sensor
(OS) and
three-way catalytic converter.
Diesel Vehicles Below 8,500 (3 850 Kg) G VWR
This system monitors engine speed and throttle position. It adjusts exhaust
gas recirculation to limit emissions.
Malfunction Indicator (SERVICE ENGINE SOON)
Light
The Malfunction Indicator (SERVICE ENGINE SOON) Light on your
instrument panel lets you know when your emission system needs service.
The light will come on briefly when you start your engine to
let you know
that the system is working. If
it does not come on when you start your
engine, or
if it comes on and stays on while you’re driving, your system
may need service. Your vehicle should still be driveable, but you should
have your system serviced right away.
Secondary Air Injection Reaction (AIR) System
(Gasoline Engines)
You may have this system. It has a control valve that will direct air to where
it is needed. If the AIR system needs service, your Malfunction Indicator
(SERVICE ENGINE
SOON) Lamp on your instrument panel will come on.
6-57
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Break.In. New Vehicle ............................................ 2-9
Composite Headlamps ......................................... 6-49
Bulb Replacement Center
High Mounted Stop Lamp (CHMSL) ........................ 6-54
Fender Marker Lamps .......................................... 6-53
Front Park/Turn Signal Lamps with Composite Headlamps ............ 6-51
Front Park/Turn Signal Lamps with Sealed Beam Headlamps ........... 6-50
HalogenBulbs ................................................ 6-48
Rear Lamps (Chassis Cab Models) ................................ 6-56
Rear Lamps (Pickup Models) .................................... 6-55
Replacement Chart ............................................. 6-88
Roof Marker Lamps ........................................... 6-54
Sealed Beam Headlamps ........................................ 6-47
Side Marker Lamps ............................................ 6-52
Tailgate Marker Lamps ......................................... 6-53
C
Capacities and Specifications ....................................... 6-80
CarbonMonoxide ............................................... 2-32
Care of Your Cassette Tape Player (See “Audio Systems” )
Cassette Tape Player System (See “Audio Systems” )
Catalyticconverter .............................................. 6-57
Center High Mounted Stop Lamp (CHMSL) (See “Lamps” )
Certificatioflire Label ........................................... 4-37
Changing a Flat Tire .............................................. 5-26
Chemical Paint Spotting ........................................... 6-74
Cigarette LightedAshtrays ......................................... 2-58
Child Restraints (See “Safety Belts”)
Circuit Breakers (See “Fuses and Circuit Breakers”)
Cleaning DieselEngine
................................................ 6-14
Fabric Protection .............................................. 6-69
Finishcare .................................................. 6-72
Glass ....................................................... 6-71
InsideofVehicle .............................................. 6-68
Leather ..................................................... 6-70
Instrument Panel, Top .......................................... 6-70
Outside of Vehicle ............................................. 6-72
Outside of the Windshield and Wiper Blades ........................ 6-71
Special Problems .............................................. 6-69
Vinyl ....................................................... 6-70
Weatherstrips ................................................. 6-71
Audio System with AUTO TONE System ........................... 3-7
Audio System without AUTO TONE System ........................ 3-6
Underbody .................................................. 6-74
WheelsandTires .............................................. 6-73
Clock, Setting the
ComfortControls
................................................. 3-1
Compact Disc (CD) System (See “Audio Systems”)
Compass
....................................................... 2-54
Control of a Vehicle ............................................... 4-4
Coolant (See “Engine”)
Cooling System Capacity
.......................................... 6-82
Courtesy Transportation ............................................ 8-7
CrankcaseCapacity .............................................. 6-83
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