Chevrolet Silverado / GMC Sierra. Service manual — part 1215

2008 Chevrolet Silverado 1500

2008 DRIVELINE/AXLE Wheel Drive Shafts - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

GENERAL INFORMATION

Trouble Shooting - Basic Procedures

* PLEASE READ THIS FIRST *

ACCESSORIES & ELECTRICAL

CHARGING SYSTEM TROUBLE SHOOTING

BASIC CHARGING SYSTEM TROUBLE SHOOTING CHART

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.

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.

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

Vehicle Will Not Start

Dead battery

Check battery cells,

alternator belt tension and

alternator output

Loose or corroded battery connections

Check all charging system

connections

2008 Chevrolet Silverado 1500

GENERAL INFORMATION Trouble Shooting - Basic Procedures

2008 Chevrolet Silverado 1500

GENERAL INFORMATION Trouble Shooting - Basic Procedures

Ignition circuit or switch malfunction

Check and replace as

necessary

Alternator Light Stays On With Engine Running

Loose or worn alternator drive belt

Check alternator drive

tension and condition, See

Belt Adjustment in TUNE-

UP article in the TUNE-UP

section

Loose alternator wiring connections

Check all charging system

connections

Short in alternator light wiring

See Indicator Warning

Lights in STANDARD

INSTRUMENTS in the

ACCESSORIES &

EQUIPMENT section

Defective alternator stator or diodes

See Bench Tests in

ALTERNATOR article

Defective regulator

See Regulator Check in
ALTERNATOR article

Alternator Light Stays Off With Ignition Switch ON

Blown fuse

See WIRING DIAGRAMS

Defective alternator

See Testing in

ALTERNATOR article

Defective indicator light bulb or socket

See Indicator Warning

Lights in STANDARD

INSTRUMENTS in the

ACCESSORIES &

EQUIPMENT section

Alternator Light Stays OFF With Ignition Switch ON

Short in alternator wiring

See On-Vehicle Tests in

ALTERNATOR article

Defective rectifier bridge

See Bench Tests in

ALTERNATOR article

Lights or Fuses Burn Out Frequently

Defective alternator wiring

See On-Vehicle Tests in

ALTERNATOR article

Defective regulator

See Regulator Check in

2008 Chevrolet Silverado 1500

GENERAL INFORMATION Trouble Shooting - Basic Procedures

ALTERNATOR article

Defective battery

Check and replace as

necessary

Ammeter Gauge Shows Discharge

Loose or worn drive belt

Check alternator drive belt

tension and condition. See

Belt Adjustment in TUNE-

UP article in the TUNE-UP

section

Defective wiring

Check all wires and wire

connections

Defective alternator or regulator

See Bench Tests and On-

Vehicle Tests in

ALTERNATOR article

Defective ammeter, or improper ammeter wiring
connection

See Testing in

STANDARD

INSTRUMENTS in the

ACCESSORIES &

EQUIPMENT section

Noisy Alternator

Loose drive pulley

Tighten drive pulley

attaching nut

Loose mounting bolts

Tighten all alternator

mounting bolts

Worn or dirty bearings

See Bearing Replacement

ALTERNATOR article

Defective diodes or stator

See Bench Test in

ALTERNATOR article

Battery Does Stay Charged

Loose or worn drive belt

Check alternator drive belt

tension and condition. See

Belt Adjustment in

appropriate TUNE-UP

article in the TUNE-UP

section

Loose or corroded battery connections

Check all charging system

connections

Loose alternator connections

Check all charging system

2008 Chevrolet Silverado 1500

GENERAL INFORMATION Trouble Shooting - Basic Procedures