Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2003AVALANCHE 1500 2WD V8-5.3L VIN TREPAIR AND DIAGNOSISBODY AND FRAMEBODY CONTROL SYSTEMSBODY CONTROL MODULEDIAGRAMSDIAGNOSTIC AIDSTRAINING
2003 Chevrolet Avalanche 1500 2WD V8-5.3L VIN T
Training
2003 Chevrolet Avalanche 1500 2WD V8-5.3L VIN TSECTION Training
DEALERS
All U.S. Dealers participating in the GM Common Training Program can enroll through the GM Common Training System Website at https://www.gmcommontraining.com. Within the website, there are individual training paths that are designed to assist in planning the training needs for each individual. Technicians should advise their Service Manager of their training needs including course names and course numbers. Dealers who have questions about GM Common Training should contact the GM Common Training help desk at 1-888- 748-2686. The help desk is available Monday through Friday, 8:00 A.M. - 8:00 P.M. Eastern Time, excluding holidays. For GM Access support, contact the GM Access Help Desk at 1-888- 337-1010.
FLEETS
GM Fleet customers with GM Warranty In-Shop agreements are able to participate in service technical training through GM Common Training/GM Service Technical College (STC).
Assistance for all GM fleet customers using GM STC products and services is provided on the Internet via www.gmcommontraining.com using the "Contact Us" button on the site and/or the GM Common Training Help Desk at 1-888-748-2687. To order GM STC Training Materials, please contact the GM Training Materials Headquarters at 1-800-393-4831.
NOTE: Most GM STC course materials have associated charges.
To purchase authentic GM STC Training Materials, contact the GM Training Materials Headquarters at 1-800-393-4831.
NON-GM DEALER TECHNICIANS
Technicians training for non-GM dealers is available through AC Delco. This training is for AC Delco customers employed in the automotive or truck service industry.
AC Delco courses are available at the GM Training Center course. Availability and schedules can be obtained by calling 1-800-825-5886 or contact us via the web at www.acdelcotechconnect.com and select the training button. Clinics are also offered through AC Delco Warehouse Distributors. Contract your dealer directly for more information.
All U.S. Dealers participating in the GM Common Training Program can enroll through the GM Common Training System Website at https://www.gmcommontraining.com. Within the website, there are individual training paths that are designed to assist in planning the training needs for each individual. Technicians should advise their Service Manager of their training needs including course names and course numbers. Dealers who have questions about GM Common Training should contact the GM Common Training help desk at 1-888- 748-2686. The help desk is available Monday through Friday, 8:00 A.M. - 8:00 P.M. Eastern Time, excluding holidays. For GM Access support, contact the GM Access Help Desk at 1-888- 337-1010.
FLEETS
GM Fleet customers with GM Warranty In-Shop agreements are able to participate in service technical training through GM Common Training/GM Service Technical College (STC).
Assistance for all GM fleet customers using GM STC products and services is provided on the Internet via www.gmcommontraining.com using the "Contact Us" button on the site and/or the GM Common Training Help Desk at 1-888-748-2687. To order GM STC Training Materials, please contact the GM Training Materials Headquarters at 1-800-393-4831.
NOTE: Most GM STC course materials have associated charges.
To purchase authentic GM STC Training Materials, contact the GM Training Materials Headquarters at 1-800-393-4831.
NON-GM DEALER TECHNICIANS
Technicians training for non-GM dealers is available through AC Delco. This training is for AC Delco customers employed in the automotive or truck service industry.
AC Delco courses are available at the GM Training Center course. Availability and schedules can be obtained by calling 1-800-825-5886 or contact us via the web at www.acdelcotechconnect.com and select the training button. Clinics are also offered through AC Delco Warehouse Distributors. Contract your dealer directly for more information.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.