Sierra 2500 Denali 2WD V8-6.0L (2011)
22. Turn the ignition key ON, with the engine OFF. Check to see if the brake system warning lamp remains illuminated.
Note: If the brake system warning lamp remains illuminated, DO NOT allow the vehicle to be driven until it is diagnosed and repaired.
23. If the brake system warning lamp remains illuminated, refer to Symptoms - Hydraulic Brakes (See: Testing and Inspection/Symptom Related
Diagnostic Procedures/Symptoms - Hydraulic Brakes).
