2006 Chevrolet Colorado Brake Master Cylinder Bleeder Tool

You should not allow the vehicle to be driven until it is diagnosed and repaired.

The procedure is to remove the master cylinder reservoir cap and diaphragm, install suitable fittings to the master cylinder ports that match the type of flare seat required and also provide for hose attachment, install transparent hoses to the fittings installed to the master cylinder ports, fill the master cylinder reservoir to at least the half-way point with Delco Supreme 11 (R), GM P/N 12377967 (Canadian P/N 992667), depress and release the primary piston until fluid flows freely from the ports with no evidence of air bubbles, remove the transparent hoses from the master cylinder reservoir, install the master cylinder reservoir cap and diaphragm, remove the fittings with the transparent hoses from the master cylinder ports, and then remove the master cylinder from the vise.

The procedure is to install a scan tool to the vehicle, start the engine and allow the engine to idle, depress the brake pedal firmly and maintain steady pressure on the pedal, turn the ignition OFF, remove the scan tool from the vehicle, bleed the hydraulic brake system, depress and release the brake pedal, turn the ignition key ON, with the engine OFF, drive the vehicle to exceed 13 kph (8 mph) to allow ABS initialization to occur, and then observe brake pedal feel.

You should use only Delco Supreme 11 (R), GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container.