Three problems related to brake master cylinder have been reported for the 2001 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 GMC Yukon based on all problems reported for the 2001 Yukon.
The brake lines have rusted and at least 1 has ruptured leaving vehicle without any brakes. Brake petal goes directly to the floor and no brake fluid was found in the master cylinder reservoir. I have read that many other similar vehicles have had the same issue.
Slow speed stop approaching a locked gate. Brake pedal was applied. Pedal dropped to the floor with complete loss of brake pressure. Brake pedal was pumped twice with the final application locking one rear wheel. The above vehicle stopped within 2 feet of striking a metal security gate. Brake fluid was observed dripping from under the drivers side compartment on to the ground. Vehicle was towed to my mechanic. Mechanic found that there was excessive rust on all metal brake tubing. One of the metal brake lines from the master cylinder to the abs pump completely rusted through causing loss of all brake pressure and brake failure. All metal brake lines had to be replaced. Before and after the incident there were no warning indicator lights that were activated on the dash.
While applying the emergency brakes. The brake failed to hold. The driver noticed while driving,the brake light appeared on the dashboard and remained on. The consumer drove to the dealer for am inspection. The mechanic informed the consumer that the sensor for the emergency brake, and the master cylinder needed to be replacemed. Please fill in additional information.