Archive for October, 2021

Engine Wiring Harness Chafing Repairs

Engine Wiring Harness Chafing Repairs

Several engine wiring harness chafing conditions may be found on some 2019-2021 Silverado and Sierra models as well as some 2021 Tahoe, Suburban, Yukon and Escalade models. Depending on the […]

October 30, 2021
Insufficient Heating Performance Due to Exhaust Manifold Outlet Pipe

Insufficient Heating Performance Due to Exhaust Manifold Outlet Pipe

Some 2020-2021 Encore GX and Trailblazer models equipped with the 1.3L turbo engine (RPO L3T) may have insufficient heat or no heat in the cabin after driving for several minutes. […]

October 30, 2021
HVAC Temperature Actuator Operation at Low Temperatures

HVAC Temperature Actuator Operation at Low Temperatures

The Check Engine MIL may be illuminated on some 2020-2021 CT4 models equipped with the 2.0L engine (RPO LSY) or 2.7L engine (RPO L3B) and some 2020-2021 CT5 models equipped […]

October 30, 2021
CSMT Mobile App Update and Job Aids

CSMT Mobile App Update and Job Aids

New resources are now available to U.S. dealerships for help with submitting or reworking warranty approval requests using the Pre-Repair Authorization (PRA) application (Fig. 13) in the Certified Service Mobile […]

October 30, 2021
Service Leveling System Message Due to Aftermarket Modifications

Service Leveling System Message Due to Aftermarket Modifications

A Service Leveling System message or Speed Limited message on the Driver Information Center (DIC) on some 2021 Tahoe, Suburban, Yukon and Escalade models may be due to aftermarket modifications. […]

October 30, 2021
Dipstick Tube O-Ring Oil Leak

Dipstick Tube O-Ring Oil Leak

When diagnosing engine oil leaks on 2019-2022 Silverado, Sierra; and 2020-2022 CT4-V models equipped with the 2.7: turbocharged 4-cylinder engine (RPO L3B) (Fig. 22), inspect the dipstick tube (indicator tube) […]

October 30, 2021
Latest GM Global Electronic Parts Catalog Release Identifies Single Use Parts, Adds Links to SI and Labor Codes

Latest GM Global Electronic Parts Catalog Release Identifies Single Use Parts, Adds Links to SI and Labor Codes

The latest update to the GM Global Electronic Parts Catalog (EPC) features additional identifiers for single use parts along with a number of links to related Service Information procedures and […]

October 15, 2021
Inspecting High Voltage Insulation Gloves

Inspecting High Voltage Insulation Gloves

When working on any high voltage system on a GM vehicle, certified and tested high voltage insulation gloves must be worn. (Fig. 9) Certified and up-to-date Class “0” insulation gloves […]

October 15, 2021
Warning Lamps Illuminate During Vehicle Turns

Warning Lamps Illuminate During Vehicle Turns

Some 2020 Trax models may have airbag, theft (security) and tire pressure warning lamps that turn on/off along with an illuminated Check Engine lamp during vehicle turns. DTCs U0078 (Control […]

October 15, 2021
Squeak Sound When Turning Steering Wheel

Squeak Sound When Turning Steering Wheel

A squeak sound may be heard from the steering system when making turns in either direction on some 2017-2022 Bolt EV and 2022 Bolt EUV models. The sound may be […]

October 15, 2021