Diagnostic Test

SHIFT LEVER ASSEMBLY
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Repair
- Using the schematics as a guide, check the Shifter Lever Assembly (SLA) Electronic Shift Module (ESM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Shifter Lever Assembly per the Service Information. Refer to Transmission and Transfer Case/Automatic - NAG1/SHIFTER, Transmission - Removal .
- Perform NAG1 TRANSMISSION VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .