Bulletin No.: PIT5759C
Published date: 08/18/2020

Preliminary Information
PIT5759C Service Safety Restraints System With DTC B14DC SYM
1B and/or 13
Product Investigation Review Required
Models
Brand:

Model:

Model Years:

VIN:
from

Engine:

to

Transmissions:

Chevrolet

Tahoe

2021

All

All

All

All

GMC

Yukon

2021

All

All

All

All

Involved Region or Country North America
Additional Options (RPO)

Condition

Cause

AYQ
Some customers may comment on a "Service Safety Restraints System" message
displayed on the DIC. When checking for DTCs, a B14DC symptom 1B and/or 13 will
be set in the K36 Restraints Control Module. This DTC is for an open or high
resistance in the F106DA Driver's front seat inboard airbag deployment loop.
Under investigation.

Correction:
Currently, GM engineering is investigating this concern. In the meantime, below is the latest information:
- The latest version of GDS2 has been updated and now can be used to monitor the Driver's front seat inboard air
bag deployment loop resistance. Deployment loop 13 is for the Driver's front seat inboard air bag and can be
found in GDS2 with the following pathing: Module Diagnostics/ K36 Restraints Control Module/ Data Display/
Deployment Loop 1-14 Resistance Data.
- If unable to duplicate the concern, it may help if the technician sits in the driver's seat and applies pressure to
the inboard side of the seat back with his/her back. Use GDS2 to monitor the deployment loop 13 resistance.
Normal resistance is between 1.74 – 3.41 ohms.
- It has been found that the F106DA Driver's front seat inboard air bag connector could be the cause of the high
resistance. Inspect the F106DA Driver's front seat inboard air bag connector (shown below) to make sure it is fully
seated tightly up against the airbag (1). Also, make sure the orange CPA if fully seated (2).
Note: The driver's seat does NOT need to be removed to complete this PI. Disengage the front seat back cover
lower J-channel retainers and unzip the seat back cover zippers.

Note: For the next step, to better access the F106DA Driver's front seat inboard airbag connector, the airbag will
need to be removed.
- If no issues are found, disconnect the F106DA Driver's front seat inboard airbag connector and inspect for loose
or backed out terminals. If no issues are found, then cycle the connector by disconnecting and reconnecting it 3
times.
- After cycling the connector 3 times, follow the instructions below to apply two pieces of butyl tape GM
P/N 25777560 or equivalent, call outs 2 and 3. This will secure the Driver's front seat inboard airbag pigtail
harness and F106DA Driver's front seat inboard airbag connector (1) to prevent movement.

1. Cut two pieces of butyl tape 3.5 inches (90mm) x 1 inch (26mm) as shown (4).

2. With the driver's inboard air bag still removed from the seat, locate the air bag deployment seam (5) on the air
bag cover, shown below.

3. Install the rst piece of butyl tape by starting it just below the air bag seam (5), as shown below (6). Continue
to apply the tape following the contour of the air bag and over the air bag connector (as shown in call outs 3, 7
and 8 ) making sure to press the tape rmly so there is no looseness in the tape. Only push on the center of the
connector. Do not rotate connector and do not apply pressure on the end where the wires exit.
NOTE: Do NOT start the tape above the air bag seam (5).

4. Reinstall the driver's inboard air bag and torque the fasteners to 7 Nm (62 lb in).
5. Install the second piece of butyl tape by rst locating hole (9), which is above the driver's seat inboard air bag

harness hold down, as shown below. Position the harness so there is no tension on the airbag connector. Apply
the butyl tape on an angle (10) so the bottom edge of the tape is above the locating hole (9), as shown below.
Start from the inner ange of the frame and tape around the surface of the frame while still making sure the slack
is present in the harness branch near the connector (11). Make sure the tape does not cover the hole in the side
of the seat frame (12).

5. Reassemble the seat and use GDS2 to monitor the deployment loop 13 resistance. Verify the resistance is
within the normal range and the DTC does not return.

Parts Information
Description
Butyl Tape

Part Number
25777560 or equivalent

Quantity
1

Warranty Information
For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the following
labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage
information.
Labor Operation
*6486048

Description
Scan for DTCs, inspect and cycle F106DA Driver's front
seat inboard airbag connector, apply butyl tape and
retest
*This is a unique Labor Operation for Bulletin use only.

Labor Time
1.0 Hr.

Version History
Version

Modi ed

4
07/23/2020 - Created on.
07/29/2020 - Updated correction sections to add note and torque spec
08/03/2020 - Updated to add the taping information in the Correction and
edit labor op description and time.
08/18/2020- Updated the taping procedure in the correction.

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