PIP5794
Service Bulletin Details
Public Details for: PIP5794
This preliminary information communicates diagnostics to the dealer involving a vehicle shudder concern caused by the camshaft actuator system that can be mistaken for a transmission issue.
Models from 2021
| 2021 CADILLAC ESCALADE |
| 2021 CHEVROLET SILVERADO 1500 |
| 2021 CHEVROLET SUBURBAN |
| 2021 CHEVROLET TAHOE |
| 2021 GMC SIERRA 1500 |
| 2021 GMC YUKON |
Models from 2020
| 2020 CADILLAC ESCALADE |
| 2020 CHEVROLET SILVERADO 2500 |
| 2020 CHEVROLET SUBURBAN |
| 2020 CHEVROLET TAHOE |
| 2020 GMC SIERRA 2500 |
| 2020 GMC YUKON |
Models from 2019
| 2019 CHEVROLET SILVERADO 1500 |
| 2019 GMC SIERRA 1500 |
Bulletin No.: PIP5794 Published date: 03/25/2021 Preliminary Information PIP5794 Diagnostic Tips For Engine Related Shudder Concerns Models Brand: Model: Model Years: VIN: from to Engine: 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 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 concern and should be diagnosed further (DTCs may or may not be present). Below are line graphs from GDS2, one showing normal operation of the CMP actuator system and one that is not operating properly. Normal operation (variance under 4 degrees): Fault in camshaft actuator system (variance over 4 degrees): Version History Version Modi ed 1 03/25/2021 - Created on © 2021 General Motors. All Rights Reserved.