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NHTSA ID Number: 10141372
Manufacturer Communication Number: PIT5507E
Summary
This Preliminary Information communication provides information to the technician about vehicles that may have a diagnostic trouble code U0159 set in the instrument panel cluster and /or the body control module. For vehicles equipped with Ultrasonic Park Assist System Regular Production Option Code UD5 or UD7 technician will use Service Programming System to reprogram the Parking Assist Control Module to correct this concern. Technician will need to inspect the front park assist sensors scallops/reliefs molded into the ring if previously replaced. Technician will need to replace the sensor rings with part number 84075328.
34 Affected Products
Vehicles
MAKE | MODEL | YEAR |
CADILLAC | ESCALADE | 2015-2018 |
CHEVROLET | SILVERADO 1500 | 2014-2018 |
CHEVROLET | SILVERADO 2500 | 2015-2018 |
CHEVROLET | SUBURBAN | 2015-2018 |
CHEVROLET | TAHOE | 2015-2018 |
GMC | SIERRA 1500 | 2014-2018 |
GMC | SIERRA 2500 | 2015-2018 |
GMC | YUKON | 2015-2018 |
Parts
Front Park Assist Sensor Ring | 84075328 |
SEOCONTENT-START
Bulletin No.: PIT5507E
Published date: 05/24/2018
Preliminary Information
PIT5507E Unwanted or False Alerts / Park Assist off Message / Service Park Assist Message at Start
up with DTC U0159
Product Investigation Review Required
Models
Brand: Model: Model Years:
VIN:
Engine: Transmissions:
from to
Cadillac Escalade 2015 – 2018 All All All All
Chevrolet Silverado 1500 2014 – 2018 All All All All
Chevrolet Silverado 2500/3500 2015 – 2018 All All All All
Chevrolet Suburban 2015 – 2018 All All All All
Chevrolet Tahoe 2015 – 2018 All All All All
GMC Sierra 1500 2014 – 2018 All All All All
GMC Sierra 2500/3500 2015 – 2018 All All All All
GMC Yukon 2015 – 2018 All All All All
Supersession Statement
With Ultrasonic Park Assist System (RPO UD5 or UD7)
Supersession Statement
This PI was superseded to update the Warranty section. Please discard PIT5507D.
Condition / Concern
Some owners may comment on any of the following Parking Assist System issues:
1. (This concern only applies to 2014 – 2016 models) Unwanted/false alerts suggesting there is an object in front and/or behind the vehicle when there is nothing there. This issue is more prevalent when it is raining or snowing.
2. (This concern only applies to 2016 models) At times when the truck is first started, there is a “Service Parking Assist” message displayed. If the ignition is cycled off and back on, the message will be gone. When scanning for DTC’s, a U0159 will be set in the IPC and/or BCM. This concern only occurs at start up and is very random.
3. (This concern applies to all models listed) Unwanted/false front park assist alerts suggesting there is an object in front and/or behind the vehicle when there is nothing there. In some cases, there may be a “Park Assist Off” message displayed in the DIC and the park assist switch LED will be disabled.
Recommendations / Instructions
Conditions 1 and 2 – Engineering has developed updated Parking Assist Control Module (K41/K86) calibrations to correct these concerns. Reprogram the Parking Assist Control Module (K41/K86) with the latest calibrations currently available in TIS2WEB.
Condition 3 – Listed below are a number of factors that can cause unwanted/false park assist alerts:
Tip: Question the driver when the unwanted/false park assist alert occurs. Find out where does the DIC parking assist display show the object is located? This information is very helpful to narrow down which sensors should be inspected. Example: the DIC parking assist display shows the left front is indicating that something is present, but there is nothing there. Knowing that information will help determine which sensors/rings to inspect more closely.
– Improper painting of the sensor tip. The tip of the sensor is isolated from the body of the sensor and there should be a small amount of movement between the tip of the sensor and body of the sensor. If the area shown below is painted, it will bridge the gap between the tip of the sensor and sensor body. This will cause a ground out or transmission path between the tip of the sensor and sensor body. In addition, excessive paint thickness on the tip of the sensor can trigger false alerts.
– A new scalloped sensor ring has been released to replace the old non-scalloped sensor ring, as shown below. When servicing a sensor or sensor ring, there are benefits to using the new scalloped sensor rings, GM P/N 84075238, in place of the old non-scalloped sensor ring.
Note: The 2016 – 2017 model year Silverado 1500 and Sierra 1500 models were the first full size truck models to use the new scalloped sensor rings. They were used for the front sensors, and due to the bezel design, the old non-scalloped sensor rings can not be used or false alerts can occur. There have been reports of replacement front park assist sensors coming with the old nonscalloped sensor rings. If the old non-scalloped sensor rings were installed on these vehicles, it will cause unwanted/false front park assist alerts. This can lead to a “Park Assist Off” message being displayed. If the front sensor rings are found to be the old nonscalloped sensor rings, replace the sensor rings with the new scalloped design, GM part number 84075328.
– It is imperative when installing the new scalloped sensor rings to pay close attention that are installed onto the sensor correctly, as shown below (1).
– When the sensor and ring are installed into the bumper/bezel, care should be taken to make sure they are installed without any binding/misalignment/etc. If the sensor and/or sensor ring is not properly installed it can cause the tip of the senor to have a direct transmission path with the bezel/bumper/fascia and trigger unwanted/false alerts. Shown below, is one example of an improperly installed sensor ring. The ring was rolled when the sensor was installed.
Note: Remember even with the updated calibrations and updated sensor rings are installed, the park assist system could give false alerts and disable. Below are examples which can effect system operation. To prevent injury, death, or vehicle damage, even with Parking Assist, always check the area around the vehicle and check all mirrors before moving forward or backing.
– The Rear Park Assist will not work properly if the tailgate is down. If the tailgate is down, do not use the park assist systems and in some cases the “Park Assist Off” message may display.
– If an object is attached to the rear of the vehicle, such as a trailer, bicycle rack, trailer hitch receiver, or tow bar. Also, an object extending beyond a lowered tailgate will disable the system.
– If an object is attached to the front of the vehicle, such as brush guard, cattle guard, bully guard, lights, snow plow, hitch, push bar, bicycle rack, etc.
– If the parking assist sensors are covered by snow, mud, dirt, slush, ice, heavy rain, etc.
– The vehicle bumper is damaged.
– Excessive paint thickness on a replacement parking assist sensor.
– The parking assist sensors are disrupted by vibrations, like those caused by a large nearby vehicle, heavy equipment such as a jackhammer, aftermarket horns or siren, etc.
Parts Information
Part Number Description Qty
84075328 Front Park Assist Sensor Ring As Needed
Warranty Information
Labor Operation Description Labor Time
2810375 Parking Assist Control Module Reprogramming with SPS Use Published Labor Time
6420260 / 6630140 * Front Parking Assist Alarm Sensor Replacement Use Published Labor Time
6420280 / 6630180 * Rear Parking Assist Alarm Sensor Replacement Use Published Labor Time
6420070 / 6630080 * Parking Assist Alarm Sensor Ring Replacement Use Published Labor Time
* Use the appropriate labor operation depending on model year.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
#PIT5507A: Service Park Assist Message At Start Up With DTC U0159 And/Or False Alerts – (Jul 5, 2016)
Subject: | Service Park Assist Message At Start Up With DTC U0159 And/Or False Alerts |
Models: | 2015-2016 Cadillac Escalade Models |
2014 Chevrolet Silverado 1500 | |
2015-2016 Chevrolet Silverado, Suburban, Tahoe | |
2014 GMC Sierra 1500 | |
2015-2016 GMC Sierra and Yukon Models | |
With Ultrasonic Park Assist System (RPO UD5 or UD7) |
This PI was superseded to add 2014-2015 Models and update the Condition and Recommendation. Please discard PIT5507.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Some owners may comment of any of the following Parking Assist System issues:
- Unwanted/false alerts suggesting there is an object in front and/or behind the vehicle when there is nothing there. This issue is more prevalent when it is raining or snowing.
- (This concern only applies to 2016 models) At times when the truck is first started, there is a “Service Parking Assist” message displayed. If the ignition is cycled off and back on, the message will be gone. When scanning for DTC’s, a U0159 will be set in the IPC and/or BCM. This concern only occurs at start up and is very random.
Recommendation/Instructions
Engineering has developed updated Parking Assist Control Module (K41) calibrations to correct these concerns. Reprogram the K41 Parking Assist Control Module with the latest calibrations currently available in TIS2WEB.
Note: For condition 1 the new calibration will greatly improve Unwanted/false alerts. If the issue continues.
Warranty Information
For vehicles repaired under warranty use:
Labor Operation | Description | Labor Time |
2810375 | Parking Assist Control Module Reprogramming with SPS | Use Published Labor Time |
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
SEOCONTENT-END
Bulletin No.: PIT5507E
Published date: 05/24/2018
https://www.nhtsa.gov/recalls?nhtsaId=10141372
https://static.nhtsa.gov/odi/tsbs/2018/MC-10141372-9999.pdf
To View or Download this Document Click Here
Bulletin No.: PIT5507D
Published date: 03/27/2018
https://www.nhtsa.gov/recalls?nhtsaId=10137207
https://static.nhtsa.gov/odi/tsbs/2018/MC-10137207-9999.pdf
To View or Download this Document Click Here
Bulletin No.: PIT5507C
Published date: 03/15/2017
https://www.nhtsa.gov/recalls?nhtsaId=10116658
https://static.nhtsa.gov/odi/tsbs/2017/MC-10116658-9999.pdf
To View or Download this Document Click Here
Bulletin No.: PIT5507B
Date: Dec-2016
https://www.nhtsa.gov/recalls?nhtsaId=10111734
https://static.nhtsa.gov/odi/tsbs/2016/MC-10111734-9999.pdf
To View or Download this Document Click Here
SEOCONTENT-START
Reprogramming
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