Chevrolet Silverado / GMC Sierra. Manual — part 1219
ENGINE MECHANICAL
COOLING SYSTEM TROUBLE SHOOTING
BRAKE SYSTEM
Parking Brake cables frozen
See DRUM BRAKES
BRAKE SYSTEM
Incorrect installation of inboard disc pad
Remove and replace
correctly
Power booster output rod too long
See POWER BRAKE
UNITS BRAKE
SYSTEM
Brake pedal not returning freely
See DISC, DRUM
BRAKES BRAKE
SYSTEM
Brakes Grab or Uneven Braking Action
Malfunction of combination valve
See CONTROL VALVE
or BRAKE SYSTEM
Malfunction of power brake unit
See POWER BRAKE
UNITS or BRAKE
SYSTEM
Binding brake pedal
See DISC, DRUM
BRAKES or BRAKE
SYSTEM
Pulsation or Roughness
Uneven pad wear caused by caliper
See DISC BRAKES or
BRAKE SYSTEM
Uneven rotor wear
See DISC BRAKES or
BRAKE SYSTEM
Drums out-of-round
Reface or replace drums
NOTE:
This is GENERAL information. This article is not intended to be
specific to any unique situation or individual vehicle configuration.
The purpose of this Trouble Shooting information is to provide a list
of common causes to problem symptoms. For model-specific
Trouble Shooting, refer to SUBJECT, DIAGNOSTIC, or TESTING
articles available in the section(s) you are accessing.
2008 Chevrolet Silverado 1500
GENERAL INFORMATION Trouble Shooting - Basic Procedures
COOLING SYSTEM TROUBLE SHOOTING
CONDITION & POSSIBLE CAUSE
CORRECTION
Overheating
Coolant Leak
Fill/Pressure Test System
A/C Condenser Fins Clogged
Remove/Clean Condenser
Radiator Fins Clogged
Remove/Clean Radiator
Thermostat Stuck Closed
Replace Thermostat
Clogged Cooling System Passages
Clean/Flush Cooling
System
Water Pump Malfunction
Replace Water Pump
Fan Clutch Malfunction
Replace Fan Clutch
Retarded Ignition Timing
Reset Ignition Timing
Cooling Fan Malfunction
Test Cooling Fan/Circuit
Cooling Fan Motor Malfunction
Test Fan Motor
Cooling Fan Relay Malfunction
Test Fan Relay
Faulty Radiator Cap
Replace Radiator Cap
Broken/Slipping Fan Belt
Replace Fan Belt
Restricted Exhaust
Repair Exhaust System
Corrosion
Impurities In Coolant
Clean/Flush System
Coolant Leakage
Damaged hose
Replace Hose
Leaky Water Pump
Replace Water Pump
Damaged Radiator Seam
Replace/Repair Radiator
Leaky Thermostat Cover
Replace Thermostat Cover
Cylinder Head Problem
Check Head/Head Gasket
Leaky Freeze Plugs
Replace Freeze Plugs
Recovery System Inoperative
Loose and/or Defective Radiator Cap
Replace Radiator Cap
Overflow Tube Clogged and/or Leaking
Repair Tube
Recovery Bottle Vent Restricted
Clean Vent
No Heater Core Flow
Collapsed Heater Hose
Replace Heater Hose
Plugged Heater Core
Clean/Replace Heater
Core
2008 Chevrolet Silverado 1500
GENERAL INFORMATION Trouble Shooting - Basic Procedures
GASOLINE ENGINE - MECHANICAL TROUBLE SHOOTING
BASIC GASOLINE ENGINE - MECHANICAL TROUBLE SHOOTING CHART
Faulty Heater Valve
Replace Heater Valve
NOTE:
This is GENERAL information. This article is not intended to be
specific to any unique situation or individual vehicle configuration.
The purpose of this Trouble Shooting information is to provide a list
of common causes to problem symptoms. For model-specific
Trouble Shooting, refer to SUBJECT, DIAGNOSTIC, or TESTING
articles available in the section(s) you are accessing.
CONDITION & POSSIBLE CAUSE
CORRECTION
Engine Lopes At Idle
Intake manifold-to-head leaks
Replace manifold gasket,
See ENGINES
Blown head gasket
Replace head gasket, See
ENGINES
Worn timing gears, chain or sprocket
Replace gears, chain or
sprocket
Worn camshaft lobes
Replace camshaft, See
ENGINES
Overheated engine
Check cooling system, See
COOLING
Blocked crankcase vent valve
Remove restriction
Leaking EGR valve
Repair leak and/or replace
valve
Faulty fuel pump
Replace fuel pump
Engine Has Low Power
Leaking fuel pump
Repair leak and/or replace
fuel pump
Excessive piston-to-bore clearance
Install larger pistons, See
ENGINES
Sticking valves or weak valve springs
Check valve train
components, See
ENGINES
Incorrect valve timing
Reset valve timing, See
2008 Chevrolet Silverado 1500
GENERAL INFORMATION Trouble Shooting - Basic Procedures
ENGINES
Worn camshaft lobes
Replace camshaft, See
ENGINES
Blown head gasket
Replace head gasket. See
ENGINES.
Clutch slipping
Adjust pedal and/or
replace components, See
ENGINES
Engine overheating
Check cooling system, See
COOLING
Auto. Trans. pressure regulator valve faulty
Replace pressure regulator
valve
Auto. Trans. fluid level too low
Add fluid as necessary
Improper vacuum diverter valve operation
Replace vacuum diverter
valve
Vacuum leaks
Inspect vacuum system
and repair as required
Leaking piston rings
Replace piston rings, See
ENGINES
Faulty High Speed Operation
Low fuel pump volume
Replace fuel pump
Leaking valves or worn
Replace valves and/or
springs, See ENGINES
Incorrect valve timing
Reset valve timing,See
ENGINES
Intake manifold restricted
Remove restriction
Worn distributor shaft
Replace distributor
Faulty Acceleration
Improper fuel pump stroke
Remove pump and reset
pump stroke
Incorrect ignition timing
Reset ignition timing, See
TUNE-UP
Leaking valves
Replace valves, See
ENGINES
Worn fuel pump diaphragm or piston
Replace diaphragm or
piston
Intake Backfire
2008 Chevrolet Silverado 1500
GENERAL INFORMATION Trouble Shooting - Basic Procedures
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