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Fig. 18: Vehicle Identification Number (VIN) At Left Side Rear Of Engine Block
Courtesy of GENERAL MOTORS CORP.
The vehicle identification number (VIN) is located on the left side rear of the engine block (1 or 2) and is
typically a nine digit number stamped or laser-etched onto the engine at the vehicle assembly plant.
The first digit identifies the division.
The second digit identifies the model year.
The third digit identifies the assembly plant.
The fourth through ninth digits are the last six digits of the VIN.
DIAGNOSTIC INFORMATION AND PROCEDURES
DIAGNOSTIC STARTING POINT - ENGINE MECHANICAL
Begin the system diagnosis by reviewing the Disassembled Views , Engine Component Description ,
Lubrication Description , New Product Information , and the Drive Belt System Description . Reviewing
the description and operation information will help you determine the correct symptom diagnostic procedure
when a malfunction exists. Reviewing the description and operation information will also help you determine if
the condition described by the customer is normal operation. Refer to Symptoms - Engine Mechanical in order
to identify the correct procedure for diagnosing the system and where the procedure is located.
SYMPTOMS - ENGINE MECHANICAL
Strategy Based Diagnostics
1. Perform the Diagnostic System Check - Engine Controls in Engine Controls - 5.7L before using the
symptom tables, if applicable.
2. Review the system operations in order to familiarize yourself with the system functions. Refer to
Disassembled Views , Engine Component Description , Lubrication Description , New Product
Information , and Drive Belt System Description .
All diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for
repairing all systems. The diagnostic flow may always be used in order to resolve a system condition. The
diagnostic flow is the place to start when repairs are necessary. For a detailed explanation, refer to Strategy
Based Diagnosis in General Information.
Visual/Physical Inspection
Inspect for aftermarket devices which could affect the operation of the engine. Refer to Checking
Aftermarket Accessories in Wiring Systems.
Inspect the easily accessible or visible system components for obvious damage or conditions which could
cause the symptom.
Check for the correct oil level, proper oil viscosity, and correct filter application.
Verify the exact operating conditions under which the concern exists. Note factors such as engine RPM,
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