1992 Chevrolet APVFACTORY OEM SERVICE PROCEDURE

Bleeding Brake System: Notes

NOTE: Use only DOT 3 brake fluid from a sealed container. DO NOT use DOT 5 silicone brake fluid.

Before servicing system, place rear displacement cylinder pistons in upper position. To position pistons, connect Tech 1 Scan Tester (94-00101-A), and enter manual control function. Ensure enable relay is on. Apply front and rear motor. Pistons should return to upper position.

If Tech 1 is not available, bleed front brakes only. Ensure brakes are functioning. Drive vehicle at least 4 MPH to initialize ABS system. ABS initialization will return rear displacement cylinder piston to upper position. The brake system is now ready for service.

WARNING: DO NOT tap into vehicle's brake system to operate trailer brake system.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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