Engine Identification

2004 Oldsmobile Bravada AWDSECTION Engine Identification
WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Identification
G01675275Courtesy of GENERAL MOTORS CORP.

The engine identification number is located on three locations. There is a label on the front of the right rocker arm cover (1), the rear of the left rocker arm cover (2), and a label on the right side of the engine oil pan (3). The engine identification number is used to track and distinguish the engine prior to installation in a vehicle.

The Vehicle Identification Number (VIN) Derivative is located on the left rear side of the engine block and is a nine digit number stamped or laser etched onto the engine at the vehicle assembly plant. If reading the identification number from the left, the following information can be obtained:

  • 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 Vehicle Identification Number (VIN).
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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.