Monthly Archives: May 2017

SPS Updated to Prohibit or Warn about Programming with Same Calibration

In an effort to decrease the number of unneeded programming events, reduce the risk of programming-induced faults, and support timely vehicle repairs, the Service Programming System (SPS) has been updated recently to prohibit or warn users against programming a control … Continue reading

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SPID Label Content Now Included with Certification Label

The Service Parts Identification (SPID) label, often located in the trunk or glovebox of a vehicle, lists a vehicle’s VIN, RPO codes and other information that identify the content of the vehicle. Beginning with the 2018 model year, much of … Continue reading

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Programming a Replacement OnStar Module

If the OnStar module is replaced in a 2009-2018 Buick, Cadillac, Chevrolet or GMC model, several conditions may occur if the module is not properly programmed or activated. These conditions may include a red LED illuminating, no Wi-Fi operation (Mobile … Continue reading

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Mark of Excellence Q3 Test on Center of Learning

The Q3 (3rd quarter) Mark of Excellence Product Knowledge Test (U.S.) for technicians is available now on the Center of Learning website at www.centerlearning.com. Each of the four quarterly tests measure technicians’ knowledge of GM products. Questions are based on … Continue reading

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Fuel Odor or Leak from Underhood Fuel Feed Pipes

A fuel odor or fuel leak in the front of the vehicle may be noticed on some 2016-2017 CTS, Camaro; 2015-2017 Escalade/ESV, Tahoe/Suburban, Yukon/XL, and Corvette models equipped with a V8 engine (RPOs LT1, LT4, L83, L86) and 2014 Silverado … Continue reading

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Proper Oil Filter Use on the 1.4L Engine

The 1.4L turbocharged engine (RPO LUV) available in 2013-2018 Encore, 2016 Cruze (VIN P), 2013-2015 Cruze, and 2013-2018 Sonic and Trax models uses two different oil filters. It’s important to correctly identify and use the correct oil filter for the … Continue reading

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Lack of Performance in High Ambient Temperatures

Some 2013-2017 GM models may have a lack of performance in excessively hot and sustained ambient temperatures over 100° F (37.7° C) due to vapor buildup in the fuel feed line. DTCs P2635 (Fuel Pump Flow Performance) and P018B (Fuel … Continue reading

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Service Know-How

10217.07V – Emerging Issues July 13, 2017   The latest service topics from Brand Quality and Engineering are reviewed, including a closer look at the new 2018 Camaro ZL1 1LE (Fig. 11) and timing chain removal and installation on the … Continue reading

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Cadillac CT6 PLUG-IN Delivers Efficient Performance

The new 2017 Cadillac CT6 PLUG-IN (Fig. 1) is a new type of hybrid vehicle that delivers added performance with an efficient powertrain. The turbocharged 2.0L 4-cylinder engine (RPO LTG) and hybrid electric variable transmission (RPO MRD) combine with a … Continue reading

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Using the Audio Diagnostic Tracks on a USB Drive

An audio system speaker malfunction may have several possible causes. One way to test speaker function is by using the audio diagnostic tracks on the EL-50334-6 Audio System Diagnostic CD or J-39916-CD Diagnostic CD.   Improper speaker mounting or loose … Continue reading

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Installing Cruze Air Deflectors during PDI

The wheelhouse liner may be coming into contact with the tire on some 2016-2018 Cruze models. If this condition is found, verify that all four underbody tire air deflectors are properly installed in front of the front tires (Fig. 16) … Continue reading

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Static Sound on Outbound Bluetooth Calls

On some 2017 Colorado and Canyon models equipped with the color radio (RPO IOB) with the 7-inch screen (Fig. 19), a buzz or static sound may be heard during the first 5-20 seconds of an outbound Bluetooth call. Only the … Continue reading

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Duramax Diesel Hesitation and Other Conditions

Some 2017 Silverado and Sierra models equipped with the Duramax Diesel 6.6L V8 engine (RPO L5P) (Fig. 20) may have a hesitation, bump, harsh shifts or other related conditions. Any of the following DTCs may be set: P0097, P0128, P0181, … Continue reading

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Misfire Conditions

A misfire condition may be present on some 2016-2017 ATS, CTS, Camaro; 2017 LaCrosse, Colorado, Canyon, Acadia, and XT5 models equipped with the 3.6L V6 engine (RPOs LGX, LGZ) and 2016-2017 CT6 models equipped with the 3.6L V6 engine (RPO … Continue reading

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Malibu ECM Reprogramming

The Check Engine MIL may be illuminated and DTC P2097 (Post Catalyst Fuel Trim System High Limit) may be set on some 2016-2017 Malibus equipped with the 1.5L 4-cylinder turbocharged engine (RPO LFV). (Fig. 22)   Fig. 22   If … Continue reading

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Service Know-How

10217.06V – Emerging Issues June 8, 2017   The latest service topics from Brand Quality and Engineering are reviewed, including the prop shaft removal procedure on the 2017 LaCrosse (Fig. 23) and sound concerns on the Tremec 7-speed manual transmission … Continue reading

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