PIP5794B
Service Bulletin Details
Public Details for: PIP5794B
This preliminary information communicates diagnostics to the dealer involving a vehicleshudder concern caused by the camshaft actuator system that can be mistaken for a transmission issue.
Models from 2021
Models from 2020
Models from 2019
| 2019 CHEVROLET SILVERADO 1500 |
| 2019 CHEVROLET SILVERADO 2500 |
| 2019 CHEVROLET SILVERADO 3500 |
| 2019 GMC SIERRA 1500 |
| 2019 GMC SIERRA 2500 |
| 2019 GMC SIERRA 3500 |
Bulletin No.: PIP5794B Published date: 04/21/2022 Preliminary Information PIP5794B Diagnostic Tips For Engine Related Shudder / Surge Concerns Models Brand: Model: VIN: Model Years: from Engine: to Transmissions: Cadillac Escalade 2020 - 2021 All All 5.3L L84, 6.2L L87 All Chevrolet Silverado 2019 - 2021 All All 4.3L LV3 5.3L L82 L84, 6.2L L87 All Chevrolet Suburban 2020 - 2021 All All 5.3L L82/L84, 6.2L L87 All Chevrolet Tahoe 2020 - 2021 All All 5.3L L84, 6.2L L87 All GMC Sierra 2019 - 2021 All All 4.3L LV3 5.3L L82 L84, 6.2L L87 All GMC Yukon 2020 - 2021 All All 5.3L L84, 6.2L L87 All Involved Region or Country North America Condition Cause Vehicle may exhibit a shudder / surge while driving that may be mistaken for a transmission related concern Camshaft Actuator System Correction: If the concern has been determined to be engine related and not being caused by the transmission the following may be helpful: While duplicating the shudder concern monitor the data parameter "Camshaft Position Variance" in GDS2. Although target variance is 0 degrees, it is not uncommon to observe variance of up to 3-4 degrees on a properly functioning system. Any variance exceeding 3-4 degrees could potentially cause a noticeable shudder / surge concern. If the concern has been isolated to the camshaft actuator system, it is recommended to replace the camshaft actuator magnet and re-evaluate. If the shudder / surge is still present after camshaft actuator magnet replacement and camshaft actuator variance is over 4 degrees, refer to GM Service Information or GM TAC for further assistance with diagnosis. Below are line graphs from GDS2, one showing normal operation of the camshaft actuator system and one that is not operating properly. Normal operation (variance under 4 degrees): Fault in camshaft actuator system (variance over 4 degrees): Parts Information Part Number Description 12675031 Quantity MAGNET, CM/SHF POSN ACTR 1 Warranty Information For vehicles repaired under the Powertrain coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. Labor Op Description Time 4087978* Camshaft Position Actuator Magnet Replacement *This is a unique Labor Operation for Bulletin use only. Version History Version 2 Modi ed 03/25/2021 - Created on 04/07/2021 - Updated to edit correction and parts information. 08/18/2021 - Updated to include surge to the document as a possible symptom. © 2022 General Motors. All Rights Reserved. 4.9 hours