Workshop Manuals Factory service & repair GMC
01 Relays and Modules02 Sensors and Switches03 Maintenance04 Engine, Cooling and Exhaust05 Powertrain Management06 Transmission and Drivetrain07 Brakes and Traction Control08 Starting and Charging09 Power and Ground Distribution10 Steering and Suspension11 Heating and Air Conditioning12 Restraint Systems13 Accessories and Optional Equipment14 Body and Frame15 Cruise Control16 Instrument Panel, Gauges and Warning Indicators17 Lighting and Horns18 Windows and Glass19 Wiper and Washer Systems
GMC K 1500 Truck 4WD V6-262 4.3L VIN Z TBI (1995)01 · Relays and Modules
01 · Diagnostics

OnStar(R) - Aftermarket Device Interference Information (Emergency Contact Module)

Make
GMC
Model
K 1500 Truck 4WD
Engine
V6-262 4.3L VIN Z TBI
Year
1995
Section
Emergency Contact Module › Technical Service Bulletins › OnStar(R) - Aftermarket Device Interference Information
Relays and ModulesOnStar(R) - Aftermarket Device Interference Information
background image

Emergency Contact Module: Technical Service Bulletins
OnStar(R) - Aftermarket Device Interference Information

INFORMATION

Bulletin No.: 08-08-46-004

Date: August 14, 2008

Subject: 
Information on Aftermarket Device Interference with OnStar(R) Diagnostic Services

Models:
2009 and Prior GM Passenger Car and Truck (including Saturn)
2009 and Prior HUMMER H2, H3 Models
2009 and Prior Saab 9-7X

with OnStar(R) (RPO UE1)

This bulletin is being issued to provide dealer service personnel with information regarding aftermarket devices connected to the Diagnostic Link
Connector (DLC) and the impact to OnStar(R) diagnostic probes and Vehicle Diagnostic e-mails.

Certain aftermarket devices, when connected to the Diagnostic Link Connector, such as, but not limited to, Scan Tools, Trip Computers, Fuel Economy
Analyzers and Insurance Tracking Devices, interfere with OnStar's ability to perform a diagnostic probe when requested (via a blue button call) by a
subscriber. These devices also prohibit the ability to gather diagnostic and tire pressure data for a subscriber's scheduled OnStar(R) Vehicle Diagnostic
(OVD) e-mail.

These aftermarket devices utilize the Vehicles serial data bus to perform data requests and/or information gathering. When these devices are requesting
data, OnStar(R) is designed not to interfere with any data request being made by these devices as required by OBD II regulations.

The OnStar(R) advisor is unable to definitively detect the presence of these devices and will only be able to inform the caller or requester of the
unsuccessful or incomplete probe and may in some cases refer the subscriber/requester to take the vehicle to a dealer for diagnosis of the concern.

When performing a diagnostic check for an unsuccessful or incomplete OnStar(R) diagnostic probe, or for concerns regarding completeness of the
OnStar(R) Vehicle Diagnostic (OVD) e-mail, verify that an aftermarket device was not present at the time of the requested probe. Regarding the OVD
e-mail, if an aftermarket device is interfering (including a Scan Tool of any type), the e-mail will consistently display a "yellow" indication in diagnostics
section for all vehicle systems except the OnStar(R) System and Tire Pressure data (not available on all vehicles) will not be displayed (i.e. section is
collapsed). Successful diagnostic probes and complete OVD e-mails will resume following the removal or disconnecting of the off-board device.

Disclaimer

Pinch or Ctrl + scroll to zoom. Double-tap to reset.

Parts & tools for this job For 1995 GMC K 1500 Truck 4WD 4.3L

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.