The Diesel Exhaust System and DPF Soot Accumulation

The Diesel Exhaust System and DPF Soot Accumulation

The diesel exhaust system on 2017-2018 Silverado and Sierra models and 2019-2020 Silverado 2500/3500 and Sierra 2500/3500 models equipped with the 6.6L Duramax diesel engine (RPO L5P) (Fig. 1) requires […]

August 24, 2020
Latest AFIT Software V13 Now Available

Latest AFIT Software V13 Now Available

The latest software update (CH-47976-SWV13) for the CH-47976 Active Fuel Injector Tester (AFIT) has recently been released. The new update adds 2021 model year applications (up to October 31, 2020) […]

August 24, 2020
HFV6 Remanufactured Engine Drivability Diagnosis Following Installation

HFV6 Remanufactured Engine Drivability Diagnosis Following Installation

After installing a GM remanufactured High Feature V6 (HFV6) engine in some 2007-2009 G6; 2007-2010 Aura, Outlook; 2007-2011 STS; 2007-2012 Malibu; 2007-2016 Allure (Canada only), LaCrosse, CTS, SRX; 2007-2017 Equinox, […]

August 24, 2020
Silverado HD/Sierra HD Brake Squeal

Silverado HD/Sierra HD Brake Squeal

Some 2020 Silverado 2500/3500 and Sierra 2500/3500 models may have a brake squeal condition caused by the low scorch friction material used on the original brake pads. New brake pads […]

August 24, 2020
Front End Rattle Sound at Highway Speeds

Front End Rattle Sound at Highway Speeds

A whine, rattle or flutter sound may be heard coming from the front end of some 2020 Blazer models when driving at highway speeds. The sound is dependent on wind […]

August 24, 2020
Slipping Output Speed Sensor Reluctor Wheel

Slipping Output Speed Sensor Reluctor Wheel

Some 2016-2019 ATS models and 2016-2020 Camaro models equipped with the 6-speed manual transmission (RPO M13) may have an illuminated Check Engine MIL and DTC P17A2 (Transmission Clutch Slip Detected) […]

August 24, 2020
Boom Sound Under Light Throttle

Boom Sound Under Light Throttle

A boom sound or flutter vibration may be noticed on some 2020 Encore GX models equipped with the 1.3L engine (RPO L3T) at low speeds with light throttle input. If […]

August 24, 2020
GM Service Know-How Emerging Issues

GM Service Know-How Emerging Issues

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 […]

August 24, 2020
All-New 2021 Chevrolet Tahoe/Suburban and GMC Yukon/Yukon XL Have More Power, Capability, Content

All-New 2021 Chevrolet Tahoe/Suburban and GMC Yukon/Yukon XL Have More Power, Capability, Content

The all-new 2021 Chevrolet Tahoe and Suburban and 2021 GMC Yukon and Yukon XL are ready to live up to their legendary nameplates and segment leadership. The fully redesigned models […]

July 30, 2020
New 2021 Tahoe/Suburban and Yukon/Yukon XL Air Ride Adaptive Suspension

New 2021 Tahoe/Suburban and Yukon/Yukon XL Air Ride Adaptive Suspension

The Air Ride Adaptive Suspension available on the redesigned 2021 Tahoe/Suburban and Yukon/Yukon XL is an automatic level control suspension with a variable rate spring design. (Fig. 11) Fig. 11 […]

July 30, 2020
2021 Tahoe/Suburban and Yukon/Yukon XL TAC Action Center

2021 Tahoe/Suburban and Yukon/Yukon XL TAC Action Center

The GM Technical Assistance Center, or TAC, (U.S.) has established an Action Center for the all-new 2021 GMC Yukon and Yukon XL (Fig. 16) and 2021 Chevrolet Tahoe and Suburban. […]

July 30, 2020
TPMS/RF Tool Software Update

TPMS/RF Tool Software Update

The latest software update for the EL-52545 TPMS/RF Tool (Fig. 18) is now available. The update adds the following features and enhancements: Trailer Tire Pressure Monitoring System (TPMS) learn and […]

July 30, 2020
1.2L Engine Oil Pan Installation

1.2L Engine Oil Pan Installation

Proper installation of the engine oil pan on the 2020 Encore GX and 2021 Trailblazer equipped with the 1.2L engine (RPO LIH) requires that the room temperature vulcanizing (RTV) sealant […]

July 30, 2020
Warble Sound from Rear of Vehicle

Warble Sound from Rear of Vehicle

Some 2014-2019 Corvette models equipped with the 6.2L V8 engine (RPO LT1) and 8L90 automatic transmission (RPO M5U) may have a warble-type sound coming from the rear of the vehicle […]

July 30, 2020
Camshaft Position Actuator Valve Solenoid Bolt Replacement

Camshaft Position Actuator Valve Solenoid Bolt Replacement

Owners of some 2020 Encore GX and 2021 Trailblazer models equipped with the 1.3L engine (RPOT L3T) may notice an unstable engine RPM at idle and an illuminated Check Engine […]

July 30, 2020
Exhaust Pipe Shaped to Avoid Low Contact

Exhaust Pipe Shaped to Avoid Low Contact

A quick look at the exhaust pipe crossover section on 2019-2020 Silverado and Sierra models equipped with a V6 or V8 engine shows that it is not a completely round […]

July 30, 2020
Corvette Cooling System Draining and Filling Tips

Corvette Cooling System Draining and Filling Tips

The cooling system of the 6.2L V8 engine (RPO LT2) on the 2020 Corvette (Fig. 1) is designed to help maintain engine performance under extreme track environments. When filling the […]

July 22, 2020