Engine Air Leak from PCV Tube
Some 2019-2020 Silverado 1500 and Sierra 1500 models equipped with the 5.3L V8 engine (RPO L84) may have a rough idle, lean running concern, or an air leak from the […]
Some 2019-2020 Silverado 1500 and Sierra 1500 models equipped with the 5.3L V8 engine (RPO L84) may have a rough idle, lean running concern, or an air leak from the […]
A transfer case noise, vibration and harness (NVH) concern may be found on some 2020 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models equipped transfer cases RPO NQF (Electric Shift Cont, Two […]
The 2019 XT4 may have a rattle sound heard near the front of the 2.0L 4-cylinder engine (RPO LSY) due to a stuck or collapsed timing chain tensioner and, as […]
An inoperative sunroof and/or sunshade (RPO C3U) may be found on some 2018-2020 Equinox and Terrain models. The inoperative condition may be the result of the sunroof programming losing initialization. […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM certified repairs. The latest service topics from GM Brand Quality and Engineering covered in […]
Starting with model year 2020, the Bolt EV will offer an EPA-estimated 259 miles (417 km) of range on a full charge, a 21-mile (34 km) increase over previous model […]
The Service Information (SI) now features new Scalable Vector Graphics (SVG) in some of the new SI documents and bulletins. (Fig. 4) Simply put, this means the new graphics and […]
Water and other contaminates in diesel fuel will create drivability concerns and a loss of engine power. If water and/or debris is present in the fuel system, the fuel cannot […]
The new EL-52545 TPMS and RF tool (Fig. 17), which will be shipped as an essential tool to all GM dealerships in the 4th quarter of 2019, is designed to […]
The passive door unlocking feature, which uses the button on a door handle (Fig. 23) to unlock many 2019-2020 GM models, can be enabled and disabled using the Remote Keyless […]
The Drive Motor Battery, or high voltage hybrid/EV battery, on 2011-2019 Volt models (Fig. 26) is cooled or heated in order to maintain a proper temperature that aids system performance […]
Some 2020 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models may have a steering wheel oscillation, vibration or shake condition at speeds of 50–80 mph (80–129 km/h). (Fig. 33) It may be […]
The Automatic Engine Stop/Start system (RPO KL9) may be inoperative on some 2019-2020 Silverado 1500 and Sierra 1500 models. DTCs P3055 (DC/DC Converter Output Voltage 1 Performance) and P3056 (XXX) […]
As the technology in new vehicles continues to evolve and expand, more electrical bandwidth and connectivity has become necessary to ensure all the data-driven features can operate efficiently together within […]
Currently being rolled out to select dealerships in the U.S., Techline Connect brings together all the common resources technicians use every day for diagnosis and repairs in one simple application. The […]
Ever since the Tire Pressure Monitor System (TPMS) was federally mandated (U.S.) in 2008, radio frequencies have been used on GM models to communicate with the system and to determine […]
As colder winter weather rolls in, GM recommends using TOP TIER Detergent Diesel fuel in 2014-2020 GM models equipped with a diesel engine in order to maintain optimal engine performance. […]
Some 2019 Silverado 1500, Sierra 1500; and 2020 Silverado and Sierra models may have a discharged battery, the ignition may not turn off, a Shift to Park message may display […]
There may be an intermittent Shift to Park message displayed on the Driver Information Center (DIC) when the vehicle has been shifted to Park and the ignition has been turned […]
There may be a whistle or squeak sound heard coming from the engine area on some 2019-2020 Blazer models equipped with the 3.6L 6-cylinder engine (RPO LGX). The sound may […]