PIE0770

Subject:
Engineering Information - Check Engine Lamp Illuminated on Driver Information Center (DIC), DTC P2B97 Set
Attention:
Proceed with this EI ONLY if the customer has commented about this concern AND the PIE number is listed in the
Global Warranty Management / Investigate History link (GWM/IVH). If the customer has not commented about this
condition or the EI does not show in GWM/IVH, disregard the PIE, and proceed with diagnostics found in published
service information. THIS IS NOT A RECALL refer to Service Bulletin 04-00-89-053 for more details on the use of
Engineering Information bulletins.
Brand:
Model:
Chevrolet
Silverado 1500
GMC
Sierra 1500
Model Year:
VIN Breakpoint:
from
to
from
to
2023
2024
—
—
Engine:
Transmission:
Equipped with 3.0L
(RPO LZ0)
—
Involved Region or Country
U.S. Dealers ONLY
Condition
Some customers may comment on the Check Engine Lamp illuminated on the Driver Information Center
(DIC).
Technicians may find DTC P2B97 set.
Cause
GM Engineering is attempting to determine the root cause of the above condition. Engineering has a need to
gather information on vehicles PRIOR to repair that may exhibit this condition. As a result, this information will
be used to "root cause" the customer's concern and develop/validate a field fix.
Correction
Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws applicable to the activities it performs
under this bulletin, including but not limited to handling, deploying, preparing, classifying, packaging, marking, labeling, and shipping
dangerous goods. In the event of a conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you must
follow those applicable laws.
If you encounter a vehicle with the above concern, please follow document 6248759 for 2023 model year vehicles and 6313500 for model year 2024 vehicles. If
the diagnostic leads to Exhaust Gas Recirculation Valve Actuator Replacement, please record the following and contact the engineer listed below with your
findings:
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1.
Take a picture of the serial number on the exhaust pipe, as shown in the picture above.
2.
What is the Exhaust Pressure Regulator Valve Learned Position PRIOR to replacement?
3.
What is Exhaust Pressure Regulator Valve Learned Position AFTER replacement?
4.
If the two-valve learned position are within 12% (smallest number divided the highest number times 100), disconnect the exhaust rear pipe from the rest
of the exhaust with the actuator wires connected.
4.1. Using a bore scope, examine the valve inside of the pipe as the valve is commanded open and closed.
4.2. Check if the shaft rotates freely and make sure that the flap is not binding or sticking due to any debris, dirt, ice, or welding spatter, as shown in
the pictures above.
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Contact Information
The Contact Information has been redacted.
Please include the following information if leaving a message:
–
Technician name
–
Dealer name and phone number
–
Complete VIN and repair order (R.O) number
On the repair order, document the date and time the call was placed (even if the engineer was not reached).
If engineering is unable to return the call within one hour, proceed with diagnosis and repair based on information found in SI.
Warranty Information
If an engineer was contacted or required information was provided, use:
Labor Operation
Description
Labor Time
4089228*
Engineering Information - Check Engine Lamp Illuminated On (DIC), DTC
P2B97 Set
0.6 Hrs.
*This is a unique Labor Operation for bulletin use only.
Version
1
Modified
Released December 13, 2023
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