C 1500 Truck 2WD V8-6.0L VIN U (2002)
Instrument Panel Control Module: Customer Interest
Brakes - 'Reduced Brake Power' Shown on DIC
File In Section: 05 - Brakes
Bulletin No.: 02-05-23-004
Date: October, 2002
TECHNICAL
Subject:
Driver's Information Center (DIC) "Reduced Brake Power" Message, Reduced Vacuum Boost (Inspect/Replace Intake Manifold and Recalibrate the
Instrument Panel Cluster (IPC))
Models:
2002-2003 Cadillac Escalade 2WD
2002-2003 Chevrolet Avalanche 1500 Series, Silverado, Suburban, Tahoe
2002-2003 GMC Sierra, Yukon, Yukon XL
with Power Vacuum Boost Brake System (RPOs JC3 and JC4)
Condition
Some customers may comment on a "Reduced Brake Power" message on the DIC.
Cause
It is possible that a very small number of 2002 and 2003 model year vehicles may have a restriction in the vacuum booster port on the intake manifold.
On the 2003 model year, only the IPC calibration is the cause of the DIC message.
Correction
Important:
Only inspect suspect vehicles built between June 13, 2002 and August 9, 2002.
Follow the service procedure to diagnose and correct this condition.
1.
Open the hood and install fender covers.
2.
Loosen the engine sight shield bolt. The bolt should stay in the shield.
3.
Remove the engine sight shield from the sight shield retainer.