K 2500 Suburban 4WD V8-6.0L VIN U (2001)
Brake Hose/Line: Customer Interest
Brakes - Low Pedal/Warning Message/Lamp ON
Bulletin No.: 04-05-23-001
Date: January 21, 2004
TECHNICAL
Subject:
Low Brake Pedal, Red Brake Light On, Brake System Warning Message On (Tighten Rear Brake Caliper Banjo Bolts, Replace Gaskets and Install
Shields)
Models:
2000-2004 Chevrolet Silverado 2500 Series
2001-2003 Chevrolet Silverado HD 1500 Series
2001-2004 Chevrolet Suburban 2500 Series
2002-2004 Chevrolet Avalanche 2500 Series
2000-2004 GMC Sierra 2500 Series
2001-2003 GMC Sierra HD 1500 Series
2001-2004 GMC Yukon XL 2500 Series
Condition
Some customers may comment on a low brake pedal, red brake light on or the brake system warning message is on.
Cause
Under some extreme off-road conditions, debris may loosen the rear brake caliper banjo bolts causing a brake fluid leak.
Correction
Follow the service procedure below to inspect the rear brake caliper banjo bolts and gaskets and to install new slide bolts and rear caliper shield.
1.
Verify the customer's concern.
2.
Open the hood and install fender covers.
3.
Clean off the brake master cylinder reservoir with brake clean, P/N 12378392, or equivalent.
4.
Visually inspect the brake fluid level through the brake master cylinder reservoir.
^
If the brake warning light is on and the fluid level is low, continue with the next step.
^
If the brake warning light is on and the fluid level is NOT low, continue with Brake Warning Indicator Always On diagnostic.
5.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
6.
Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheel.
7.
Inspect the rear brake calipers for signs of fluid leaks around the banjo bolt area on both rear calipers.
8.
Clean off the banjo bolt area with brake clean, P/N 12378392, or equivalent.
Important:
The banjo bolts copper gasket should not be reused. The banjo bolts may be reused if not damaged.
9.
Remove the banjo bolt and discard the copper gaskets.
10.
Assemble the two new copper brake hose gaskets and the brake hose to caliper bolt to the brake hose.
Important:
Inspect both rear caliper banjo bolt torques even if only one side is leaking.
Tighten
