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2025 CHEVROLET TAHOE
5.3L V8 L84•4WD•AUTOMATIC•gas
1 active safety recall on this vehicle — view recalls
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Repairs0Labor496Torque152Fluid10DTC2017Battery1Maintenance0Recalls1
P0776moderate severityPowertrain

Pressure Control Solenoid B Performance or Stuck Off

on 2025 Chevrolet Tahoe 5.3L V8 L84 · 4WD

What this code means

The transmission pressure control solenoid B is not responding correctly or is stuck off. This causes incorrect hydraulic pressure during shifts.

Symptoms

  • Slipping transmission
  • Erratic or harsh shifts
  • Reduced power

Common causes

  • Stuck pressure control solenoid B
  • Low transmission fluid
  • Dirty fluid clogging valve body
  • Faulty valve body

Diagnostic steps

  1. Check transmission fluid level and quality
  2. Scan for additional codes
  3. Inspect and test solenoid B operation
  4. Inspect valve body and replace as needed
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