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Ping in Chevy Colorado

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Chevy Colorado

This bulletin applies to 2015-2016 Chevy Colorado trucks. Customers might complain about chugging, shuddering and/or lack of power when accelerating at speeds of 12-15 mph in second gear, or when accelerating at speeds of 30-40 mph in 6th gear with no downshift, or spark knock/ping noise under light acceleration or when climbing a hill under load. The technician may find DTC P0326 (knock sensor performance bank 1) set in the ECM as history. This condition might be caused by an anomaly in the ECM and the transmission control module.

It is important that both the ECM and TCM are updated with the latest software. Not updating both modules will result in incompatibility and additional undesired vehicle performance. Both modules must be programmed sequentially to the latest software calibration.

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