Monthly Archives: November 2015

New 2.8L Duramax Diesel Available in 2016 Colorado and Canyon

The new 2.8L Duramax turbo-diesel 4-cylinder engine (RPO LWN) is the cleanest diesel truck engine ever produced by GM. The new diesel engine (Fig 1.) will be offered in 2016 Colorado and Canyon LT and Z71 Crew Cab models with … Continue reading

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6L50 Automatic Transmission Centrifugal Pendulum Vibration Absorber

The new 2.8L Duramax diesel engine (RPO LWN) is paired with the Hydra-matic 6L50 6-speed automatic transmission (RPO MYB). The transmission (Fig. 6) incorporates a torque converter, an integral fluid pump and converter housing, a single and double planetary gear … Continue reading

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6.2L Engine Supercharger Noise

The supercharger on the 6.2L engine (RPO LSA) in the 2009-2014 CTS-V and 2012-2014 Camaro (Fig. 9) may exhibit several noises coming from the bearing, which are due to contamination of the lubricating grease. If these conditions are left unaddressed, … Continue reading

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Updated Wheel Nut Torque Specifications

The wheel nuts and wheel nut torque specifications have been updated on 2016 ATS, CTS and Camaro models.   Cadillac models   The 2016 ATS-V, CTS, and CTS-V built after the following VIN breakpoints have a new wheel nut torque … Continue reading

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USB Harness Power Supply Update

Some 2015 Acadia, Enclave and Traverse models may have a front console USB port losing power with the ignition key off or the USB music playlist restarting from the beginning after cycling the ignition.   Update the power feed harness … Continue reading

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Adaptive Cruise Control Temporarily Unavailable

If an Adaptive Cruise Temporarily Unavailable message is displayed on the Driver Information Center of some 2015-2016 Escalade models equipped with the Driver Assist Package (RPO Y66), there are several items that should be considered during diagnosis, including environmental factors, … Continue reading

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Haptic Seat Operation during a Lane Keep Assist Event

The haptic seat (Safety Alert Seat) operation on 2015-2016 ATS, CTS Sedan (VIN A), and XTS models equipped with Lane Keep Assist (RPO UHX) varies depending on the Lane Keep Assist event. It’s important to understand the proper operation of … Continue reading

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Loss of Steering Power Assist

An intermittent loss of power steering assist, a hard to steer condition or a Service Power Steering message displayed on the Driver Information Center may be found on some 2015 Colorado and Canyon models. If these conditions are found, check … Continue reading

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Adaptive Cruise Control Technology Sets (and Maintains) the Pace

The Adaptive Cruise Control (ACC) System (RPO K59, KSG) available on 2014-2016 Impala, LaCrosse, Regal, ELR and 2015-2016 Tahoe, Suburban, and Yukon models is an enhanced cruise control system with the ability to sense and react to forward traffic. (Fig. … Continue reading

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Adaptive Cruise Control Radar Module Blockage Message

The 2014-2016 Impala (VIN 1), LaCrosse, Regal, ELR and 2015-2016 Tahoe, Suburban, and Yukon models equipped with Adaptive Cruise Control (RPO K59) may display a blockage message on the Driver Information Center (DIC) due to a blocked radar sensor. The … Continue reading

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Adaptive Cruise Control DTCs in History

The 2014-2016 Impala (VIN 1), LaCrosse, Regal, ELR and 2015-2016 Tahoe, Suburban, and Yukon models equipped with Adaptive Cruise Control (RPO K59) may have a DTC set in history due to a communication issue during vehicle start-up.   DTCs P1553 … Continue reading

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MDI/MDI 2 Manager Software Installation

  GM recently began rolling out new MDI Manager software. This software includes updates for the upcoming MDI 2 hardware. It’s compatible with the current MDI and the new MDI 2, to be released soon, and operates in a similar … Continue reading

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Latest AFIT Tool Adapters Released

Several new control modules on 2016 GM models use new sensor technology. The SAE J2716 SENT (Single Edge Nibble Transmission) protocol allows for high resolution data transmission from a sensor to a control module, such as readings for temperature, pressure, … Continue reading

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Proper Air Cleaner Outlet Duct Cover Removal

When removing the air cleaner outlet duct cover, also referred to as the engine cover, on the 2015-2016 Colorado and Canyon equipped with the 3.6L V6 engine (RPO LFX), all fasteners must be fully removed in order to avoid damaging … Continue reading

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Security Code Required during Programming

When programming certain modules on 2015 Encore, Sonic, Spark and Trax models, a security code may be requested at the Techline PC.   The security code is listed in GM GlobalConnect along with the Key code, which is labeled as … Continue reading

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Service Engine Soon Lamp and Reduced Power

Some 2016 Escalade models, Silverado 1500, Suburban, Tahoe, Sierra 1500 and Yukon models equipped with the 4.3L engine (RPO LV3), 5.3L engine (RPO L83) or 6.2L engine (RPO L86) may have an illuminated Service Engine Soon (Check Engine) lamp or … Continue reading

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Service Know-How

10215.11D – Emerging Issues November 12, 2015   To view Emerging Issues seminars: • Log in to www.centerlearning.com –   Select Resources > Service Know-How/TECHAssist > Emerging Issues > Searchable Streaming Video; or –   Select Catalog to search for the course … Continue reading

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New Bulletin Review – October 2015

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