GMC DTC Tip

Dec. 10, 2019
Some owners of 2017-2018 GMC Canyon vehicles may comment on an illuminated MIL. Technicians may find DTC P0171 and/or P0174 set. If you encounter this concern, check for a vacuum leak at the PCV fresh air tube or the foul PCV tube attachment under the air cleaner outlet duct or at the intake manifold.

Some owners of 2017-2018 GMC Canyon vehicles may comment on an illuminated MIL. Technicians may find DTC P0171 and/or P0174 set. If you encounter this concern, check for a vacuum leak at the PCV fresh air tube or the foul PCV tube attachment under the air cleaner outlet duct or at the intake manifold.

Check to verify that the tube is connected to the air cleaner duct port. If the tube is secure, remove the engine rear noise shield and inspect the PCV foul air tube connection on the rear side of the intake manifold vacuum port.

Sponsored Recommendations

Variable Valve Timing (VVT) Training Series

Almost every new vehicle is equipped with VVT technology. This video explains the weak points in OE designs and gives you a complete overview of the replacement options available...

Cam & Crank Sensor Training Series

Today's advanced engines depend on accurate and consistent information from cam and crank sensors for performance, fuel economy and emissions, and not all cam and crank sensors...

Buying Your Next Diagnostic Tablet

When you last invested in a diagnostic tablet for your shop, did you consider it a potential gateway to increased revenue? Probably not. It’s likely you viewed it as a necessary...

Access Carside OEM Repair Data with MOTOR TruSpeed

Now available on all Autel MaxiSYS Ultra Series tools, MOTOR TruSpeed Repair delivers expanded OEM service and repair data within days of being published by

Voice Your Opinion!

To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!