catalytic converter GMC C-SERIES 1999 Owners Manual

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6-48 Muffler/Catalytic Converter Assemblies
(Diesel Engines)
Some vehicles equipped with a Caterpillar
diesel engine
utilize a catalytic converter
-muffler assembly. If your
vehicle is equipped with a catalytic converter
-muffler,
some special procedures may need to be followed when
servicing your vehicle. Consult your GM Truck dealer
who is an authorized Caterpillar

engine dealer
for service.
To determine your vehicle's muffler type, examine the
muffler outer housing. If your system is a catalytic
converter
-muffler type, the housing will be stamped
with the CAT logo.
Tires
Your new vehicle comes with high-quality tires made by
a leading tire manufacturer. If you ever have questions
about your tire warranty and where to obtain service, see
your GM Warranty booklet for details.
CAUTION:
Poorly maintained and improperly used tires
are dangerous.

Overloading your tires can cause
overheating as a result of too much friction.
You could have an air
-out and a serious
accident. See ªLoading Your Vehicleº in
the Index.

Underinflated tires pose the same danger as
overloaded tires. The resulting accident
could cause serious injury. Check all tires
frequently to maintain the recommended
pressure. Tire pressure should be checked
when your tires are cold.

Overinflated tires are more likely to be cut,
punctured or broken by a sudden
impact
-- such as when you hit a pothole.
Keep tires at the recommended pressure.

Worn, old tires can cause accidents. If your
tread is badly worn, or if your tires have
been damaged, replace them.
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9-6
Lamps 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dome 2-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Reminder 2-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Latches, Seatback 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leaving Your Vehicle 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lighter 2-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lights
Air Brake System Warning 2
-59 . . . . . . . . . . . . . . . . . . . . .
Anti-Lock Brake System Warning 2-61, 4-7 . . . . . . . . . . . .
Apply Park Brake Warning 2-60 . . . . . . . . . . . . . . . . . . . . .
Brake System Warning 2-57 . . . . . . . . . . . . . . . . . . . . . . . . .
Charging System Indicator 2-56 . . . . . . . . . . . . . . . . . . . . . .
Check Gages Indicator 2-67 . . . . . . . . . . . . . . . . . . . . . . . . .
Daytime Running Lamps Indicator 2-67 . . . . . . . . . . . . . . .
Diff Lock Indicator 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Do Not Shift Warning 2-57 . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Brake System Warning 2-58 . . . . . . . . . . . . . . . .
Intake Heater Indicator 2-63 . . . . . . . . . . . . . . . . . . . . . . . . .
Lamp and Bulb Data 6-74 . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Coolant Warning 2-62 . . . . . . . . . . . . . . . . . . . . . . . . .
Parking Brake Warning 2-60 . . . . . . . . . . . . . . . . . . . . . . . .
Parking Brake Indicator 2-60 . . . . . . . . . . . . . . . . . . . . . . . .
Safety Belt Reminder 1-7, 2-55 . . . . . . . . . . . . . . . . . . . . . .
Service Park Brake Warning 2-60 . . . . . . . . . . . . . . . . . . . .
Service Trans Filter Indicator 2-64 . . . . . . . . . . . . . . . . . . . .
Manual Fast Idle Indicator Light 2-62 . . . . . . . . . . . . . . . . .
Loading Your Vehicle 4-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . Locks
Door 2
-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Door 2-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubricants and Fluids 7-28 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication Service, Body 7-24 . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Record 7-31 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Owner Checks and Services 7-23 . . . . . . . . . . . . . . . . . . . . .
Recommended Fluids and Lubricants 7-28 . . . . . . . . . . . . .
Scheduled Maintenance Services 7-4 . . . . . . . . . . . . . . . . . .
Maintenance, Underbody 6-65 . . . . . . . . . . . . . . . . . . . . . . . . .
Malfunction Indicator Lamp 2-64 . . . . . . . . . . . . . . . . . . . . . .
Manual Fast Idle Indicator Light 2-62 . . . . . . . . . . . . . . . . . . .
Manual Transmission Fluid 6-19 . . . . . . . . . . . . . . . . . . . . . . .
Marker and Clearance Lamps 2-45 . . . . . . . . . . . . . . . . . . . . .
Maxi-Fuse Block 6-72 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mirrors
Convex Outside 2
-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heated Outside 2-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inside Rearview 2-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outside 2-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model Reference vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Moisture Ejector 6
-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mountain Roads 4-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Muffler/Catalytic Converter Assembly 6-48 . . . . . . . . . . . . . .
Multifunction Lever 2-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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