Monthly Archives: October 2016

New 2017 Colorado and Canyon Action Center Now Available

A new GM Technical Assistance Center (TAC) Action Center has been established for the 2017 Colorado and Canyon (Fig. 1) equipped with the new high feature 3.6L V6 engine (RPO LGZ) and 8L45 8-speed transmission (RPO M5T). The Action Center … Continue reading

Posted in Uncategorized | Leave a comment

Battery Learn Procedure Update for Stop/Start System

A new Power on Reset feature has been added to 2017 models equipped with Engine Stop/Start. As a result, the battery learn procedure is no longer required after a battery disconnect on 2017 Encore, Envision, LaCrosse, Regal, Verano, ATS, CT6, … Continue reading

Posted in Uncategorized | Leave a comment

Electrical Conditions Resulting from Damaged Wiring Harness

A number of electrical conditions, including the instrument cluster gauges drop out, the radio and HVAC displays are blank, no crank/no start, and several Driver Information Center messages displayed, may be present on some 2013-2014 Malibu models. The air bag … Continue reading

Posted in Uncategorized | Leave a comment

Power Liftgate Latch Connector

The power liftgate on some 2017 Acadia and XT5 models may not open. When diagnosing the liftgate will not open condition, disconnect and reconnect the latch electrical connector and retest power liftgate operation, making sure the connector is fully seated. … Continue reading

Posted in Uncategorized | Leave a comment

Inoperative Sunroof or Sunshade

On some 2016 CT6, Malibu (VIN Z); 2017 XT5 and LaCrosse models, the sunroof glass and/or sunshade may be inoperative.   Several DTCs may be set: B3664 (Sunroof Position Select Switch High Signal Circuit), B3697 (Sunroof Actuator Malfunction), B369B (Sunroof … Continue reading

Posted in Uncategorized | Leave a comment

Unseated Exhaust Pipe Connector Leak

An exhaust leak or noisy exhaust, sometimes described as a rattle or rumble, most noticeable on a cold start may be found on some 2014-2017 Silverado 1500 and 2015-2017 Escalade, Suburban, Suburban 3500, Sierra, and Yukon models. The exhaust leak … Continue reading

Posted in Uncategorized | Leave a comment

Harsh Shift and Rough Idle Conditions

A harsh shift and rough idle may be felt on some 2014-2017 Corvette, Silverado, Sierra; 2015-2017 Escalade, Suburban, Tahoe, Yukon; 2016-2017 CTS-V, and Camaro models.   The harsh shift may be felt on the 1/2 and 2/3 shift along with … Continue reading

Posted in Uncategorized | Leave a comment

Engineering Information Bulletins and Part Restrictions

Posted in Uncategorized | Leave a comment

Service Know-How

10216.12V – Emerging Issues December 8, 2016   The latest service topics from Brand Quality and Engineering are reviewed, including an overview of the new 2017 Bolt EV and the repair procedure for a water leak around the CHMSL on … Continue reading

Posted in Uncategorized | Leave a comment

Malibu Hybrid No Crank Condition and DTC P0AFA

If the 1.8L engine (RPO LKN) on a 2016-2017 Malibu Hybrid model (Fig. 1) does not crank after several attempts and DTC P0AFA (Hybrid/EV Battery System Voltage Low Voltage) is set, it may be necessary to replace the high voltage … Continue reading

Posted in Uncategorized | Leave a comment

The Results are In — Service Information Offers New Search Functions

Enter a few keywords in the Search box of the Service Information, click the Search button, and the results may surprise you. New search functions now offer several ways for you to narrow down a search result, delivering better, more … Continue reading

Posted in Uncategorized | 3 Comments

Identifying Non-GM Calibrations in Duramax 2.8L Diesel Engines

2016-2017 Colorado and Canyon models and 2017 Express and Savana models are available with the Duramax 2.8L turbocharged diesel engine (RPO LWN). (Fig. 9) Various performance conditions, such as poor drivability, increased emissions, knocking noises, engine damage and black exhaust … Continue reading

Posted in Uncategorized | Leave a comment

GM TAC Process Addresses Vehicle Cybersecurity

If a customer comes into a GM dealership with concerns about a cyberattack or hack on their vehicle, the GM Technical Assistance Center (TAC) has a process in place to help address the customer’s concern and collect information about the … Continue reading

Posted in Uncategorized | Leave a comment

Fuel Tank Pop Noise

Some 2010-2017 Equinox and Terrain models may have a popping noise coming from the rear of the vehicle shortly after a cold start or EVAP purge event. The sound may be due to the auxiliary fuel pump changing height — … Continue reading

Posted in Uncategorized | Leave a comment

3rd Gear Condition on Manual Transmission

Some 2017 Camaro and ATS-V models equipped with a 6-speed transmission (RPO MM6, MG9) and 2017 Corvette models equipped with a 7-speed transmission (RPO MEP, MEK) may hop out of 3rd gear due to a mis-machined gear. These vehicles will … Continue reading

Posted in Uncategorized | Leave a comment

Crossed Fuel Injector Harness

A rough idle or misfire may be noticed on some 2014-2017 Encore, 2011-2015 Cruze, 2016 Cruze Limited, 2012-2017 Sonic and 2013-2017 Trax models equipped with the 1.4L 4-cylinder engine (RPO LUJ, LUV). DTC P0300 (Engine Misfire Detected) may be set … Continue reading

Posted in Uncategorized | Leave a comment

Engineering Information Bulletins and Part Restrictions

Posted in Uncategorized | Leave a comment

Service Know-How

10216.11V – Emerging Issues November 10, 2016   The latest service topics from Brand Quality and Engineering are reviewed, including an overview of the new 2017 Camaro ZL1 and 1LE models and repairs for poor mobile telephone microphone performance. (Fig. … Continue reading

Posted in Uncategorized | Leave a comment