Radiator; Carburetors; Engine Electrical; Emissions - GMC G Service Manual

6-2 ENGINE
SECTION 6B1
ENGINE COOLING
This section has information on cooling system compo­
nents, including:
• Diagnosis
• Water Pump
• Fan and Fan Clutch
• Auxiliary Fan
• Belts
• Thermostat.
SECTION 6B2
RADIATORS
This section contains information on radiators and
shrouds, including aluminum radiator repair procedures.
SECTION 6C
FUEL SYSTEM
This section contains information on carbureted fuel sys­
tem components, including:
• Accelerator controls
• Fuel tanks
• Air cleaners
• Fuel filters
• Fuel pump
• Fuel tank sending unit
• For fuel filter, pump, and sending unit information on
TBI equipped vehicles, refer to the "Fuel and Emis­
sions Service Manual."
SECTION 6C1

CARBURETORS

This section contains information for carburetor "on-
vehicle" service and adjustments. For overhaul information,
refer to the "Light Duty Truck Unit Repair Manual."
SECTION 6C2
DIESEL FUEL INJECTION
This section contains information on the fuel injection
system used on 6.2L diesel engines, including:
• Timing adjustment and other adjustment procedures.
• Injection nozzle replacement and testing.
• Injection pump replacement and repairs.
SECTION 6D

ENGINE ELECTRICAL

This section contains information on electrical compo­
nents associated with engine operation, including:
• Spark plug wires
• Block heaters
• Battery
• Glow plug system
• Starters
• Generators
• Distributors.
"On-vehicle" service procedures are given. For overhaul
information, refer to the "Light Duty Truck Unit Repair
Manual."
SECTIONS 6E AND 6E1
EMISSIONS AND CARBURETOR

EMISSIONS

This section contains information on the emissions sys­
tems on carbureted engines, including diagnosis and com­
ponent replacement. For information on TBI emissions
systems, refer to the "Fuel and Emissions Service Manual."
SECTION 6E2

DIESEL EMISSIONS

This section contains information on the emissions sys­
tems of 6.2L diesel engines, including component repair.
Driveability diagnosis can be found in ENGINE,
DRIVEABILITY AND DIAGNOSIS (SEC. 6A).
SECTION 6F

EXHAUST

This section contains information on the exhaust sys­
tem, including component replacement.
SECTION 6H
VACUUM PUMPS
This section contains information on vacuum pumps,
including replacement procedures and diagnosis.