Source reference 2005-08-51

Manufacturer communication — 2004 GMC FULL-SIZE 2004 CADILLAC, CHEVROLET AND GMC TRUCKS AND UTILITIES (YUKON)

Reporter type: Manufacturer

Vehicles as recorded

2004 GMC FULL-SIZE 2004 CADILLAC, CHEVROLET AND GMC TRUCKS AND UTILITIES (YUKON XL) This vehicle's overview →
2004 GMC FULL-SIZE 2004 CADILLAC, CHEVROLET AND GMC TRUCKS AND UTILITIES (YUKON) This vehicle's overview →

What the manufacturer’s document says

fault and correction ・ names no model (for full-size utilities)

Applies to

Applies to all full-size 2004 Cadillac, Chevrolet and GMC trucks and utilities with the Hydroboost brake system.
the passage
This information applies to all full-size 2004 Cadillac, Chevrolet and GMC trucks and utilities with Hydroboost brake system.

Fault

The Service Brake Booster message notifies the driver of a Supplemental Brake Assist (SBA) concern on vehicles with a vacuum boost brake system.
the passage
The Service Brake Booster message is used to notify the driver of a Supplemental Brake Assist (SBA) concern on vehicles equipped with a vacuum boost brake system.
There have been reports of the Service Brake Booster message being displayed on vehicles equipped with a Hydroboost brake system.
the passage
There have been reports of the Service Brake Booster Message being displayed on vehicles equipped with a Hydroboost brake system.

Finding the cause

Possible causes

The message could be caused by the IPC being programmed incorrectly.
the passage
This message could be caused by the IPC being programmed incorrectly.
If the IPC was replaced in an earlier unrelated repair and was not SPS programmed, the message is displayed after the IPC does not receive a valid state of health signal from the SBA for 5 consecutive ignition cycles.
the passage
If the IPC was replaced on a previous unrelated repair and was not SPS programmed, this message will be displayed after the IPC does not receive a valid state of health signal from the SBA for 5 consecutive ignition cycles.

Steps to confirm (in the document’s order)

During normal diagnostics a DTC C0136 may be present in the IPC; this DTC is not in SI for Sport Utility vehicles, because all Sport Utilities use Hydroboost brake systems starting in 2004.
the passage
During normal diagnostics, a DTC C0136 may be present in the IPC. This DTC will not be in SI for Sport Utility vehicles, because all Sport Utilities use Hydroboost brake systems starting in 2004.
To be sure the vehicle is repaired, cycle the ignition off and on at least 5 consecutive times, staying in each position at least 30 seconds.
the passage
To be sure the vehicle is repaired, cycle the ignition to off and on at least 5 consecutive times, delaying in each position at least 30 seconds.

Correction

Repair

To correct the concern, SPS program the IPC.
the passage
To correct this concern, SPS program the IPC.

What is needed

Parts and materials: Not stated
Labor time: Not stated
Special tools: Not stated
Scan tool: SPS program the IPC

Only what the technical documents state. "Not stated" does not mean not needed.

Compiled by reading the full text of the document; each point stands on the passage shown. Check the document itself, linked below, before working on a vehicle.

Stated content

Communication summary
Service Brake Booster メッセージこの情報は、Hydroboost ブレーキシステムを装着したフルサイズの 2004 Cadillac、Chevrolet、GMC のトラックおよびユーティリティすべてに適用される。 Service Brake Booster メッセージは、バキュームブースト式ブレーキシステムを装着した車両で、Supplemental Brake Assist（SBA）の不具合を運転者に知らせるために使われる。 Hydroboost ブレーキシステムを装着した車両で Service Brake Booster メッセージが表示されたという報告がある。通常の診断の際、IPC に DTC C0136 が入っていることがある。2004 からスポーツユーティリティはすべて Hydroboost ブレーキシステムを使用しているため、この DTC はスポーツユーティリティ車の SI には載っていない。このメッセージは、IPC が誤ってプログラムされていることが原因である可能性がある。以前の無関係な修理で IPC が交換され、SPS でプログラムされていなかった場合、IPC が SBA から有効なステートオブヘルス信号を連続 5 回のイグニッションサイクルで受け取らなかった後に、このメッセージが表示される。この不具合を直すには、IPC を SPS でプログラムする。車両が修理されたことを確かめるには、イグニッションのオフとオンを少なくとも連続 5 回繰り返し、それぞれの位置で少なくとも 30 秒間待つ。 Machine translation (unreviewed)
Service Brake Booster Message This information applies to all full-size 2004 Cadillac, Chevrolet and GMC trucks and utilities with Hydroboost brake system. The Service Brake Booster message is used to notify the driver of a Supplemental Brake Assist (SBA) concern on vehicles equipped with a vacuum boost brake system. There have been reports of the Service Brake Booster Message being displayed on vehicles equipped with a Hydroboost brake system. During normal diagnostics, a DTC C0136 may be present in the IPC. This DTC will not be in SI for Sport Utility vehicles, because all Sport Utilities use Hydroboost brake systems starting in 2004. This message could be caused by the IPC being programmed incorrectly. If the IPC was replaced on a previous unrelated repair and was not SPS programmed, this message will be displayed after the IPC does not receive a valid state of health signal from the SBA for 5 consecutive ignition cycles. To correct this concern, SPS program the IPC. To be sure the vehicle is repaired, cycle the ignition to off and on at least 5 consecutive times, delaying in each position at least 30 seconds.
Go to this passage in the original

Source

Source: GM TechLink
Source reference: 2005-08-51
Received by source: 2005-08-01
Incident date: Unknown

Open original text and source Open the provider's page (external)