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Home >> Buick >> 2019 >> Envision Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 80 (Power Transfer Unit/Transfer Case - AAM) >> Diagnostic Information and Procedures >> Symptoms - Power Transfer Unit Case >> Strategy Based Diagnostics

Strategy Based Diagnostics

WARNING: This page is about a different car, the 2018 Buick Envision. However, it is still accessible from the selected car via links, so may be relevant.

Review the system operations in order to familiarize yourself with the system functions. Refer to Power Transfer Unit Case Disassembled View , Power Transfer Unit Case Description and Operation , and Rear Drive Axle Description and Operation (Without G99)Rear Drive Axle Description and Operation (With G99) . 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 .

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