Service Leveling System/Speed Limited Message Due To Aftermarket Modifications (PIT5854C)
Reference number: PIT5854C
Supersedes refnos: PIT5854, PIT5854A, PIT5854B
SERVICE LEVELING SYSTEM/SPEED LIMITED MESSAGE DUE TO AFTERMARKET MODIFICATIONS
TECHNICAL SERVICE BULLETIN
SERVICE INFORMATION
| Brand: | Model: | Model Year: | VIN: | Engine: | Transmission: | ||
|---|---|---|---|---|---|---|---|
| from | to | from | to | ||||
| Cadillac | Escalade | 2021-2025 | All | All | All | All | |
| Cadillac | Escalade ESV | 2021-2025 | All | All | All | All | |
| Chevrolet | Suburban | 2021-2025 | All | All | All | All | |
| Chevrolet | Tahoe | 2021-2025 | All | All | All | All | |
| GMC | Hummer EV | 2022-2025 | All | All | All | All | |
| GMC | Yukon | 2021-2025 | All | All | All | All | |
| GMC | Yukon XL | 2021-2025 | All | All | All | All | |
| Involved Region or Country | North America |
| Additional Options (RPO) | F47 |
| Condition | Some customers may comment on a Service Leveling System/Speed Limited message on DIC. Dealers may find no DTC's present. |
| Cause | This could be caused by incorrect vehicle ride height variance due to an aftermarket lowering kit installed. |
CORRECTION
Inspect for vehicle ride height being altered by performing the Trim Height Inspection (example Document ID # 5568651.)
These lowering kits can cause premature wear to the air suspension components, tires, CV Joint, and also affect headlamp aiming.
Vehicle Ride Height lowered
Decreased distance between top of tire and fender well.
If the suspension has been found to be lower than factory settings, inspect for aftermarket adjustable suspension height sensor links being installed.
Factory suspension height sensor links are not adjustable. As shown below:
Aftermarket Adjustable suspension height sensor links. As shown below:
Aftermarket Adjustable Height Sensor Linkages incorrectly adjusted side to side.
Aftermarket Adjustable Height Sensor Link not secured properly, preventing accurate height sensor readings.
Notice Angle or Rear Axle Drive Shaft due to suspension being lowered.
WARRANTY INFORMATION
Any concerns or damage that occurs as a result of vehicle modification may not be covered under the Terms of the New Vehicle Limited Warranty. Reference the latest version of TSB 09-00-89-016 WARRANTY ADMINISTRATION - LABOR OPERATION 0600014 - SUSPECTED TAMPERING OR VEHICLE MODIFICATIONS if needed.
| Version | 4 |
| Modified | 09/21/2021 - Created on. 06/21/2022 - Added 2022 Model Year and Hummer EV 07/11/2024 - Updated Model Years 01/17/2025 - Updated Model Year |