GM has issued a Customer Satisfaction Program for certain units of the 2023 Chevy Silverado 1500 which were apparently built with the wrong wiring harness. The incorrect wiring harness was also installed in certain units of the 2023 GMC Sierra 1500.
Having the incorrect wiring harness installed means there may be missing circuits needed for certain pieces of equipment, based on the truck’s trim level and options.
Only a tiny handful of 2023 Chevy Silverado trucks were affected by the incorrect part installation. GM’s service bulletin provides the VIN numbers of three Chevy Silverado units in total, and three 2023 GMC Sierra trucks similarly affected, for a total of six vehicles across both nameplates.
Dealers are instructed to inspect 2023 Chevy Silverado trucks which may be fitted with an incorrect wiring harness before ordering parts. If the truck is confirmed as being equipped with a body harness that is missing circuits based on its trim level and equipment, an appropriate service cable kit should be ordered from the Warranty Parts Center.
The replacement program starts in March 2023 and continues through April 30th, 2025. The replacement harness is VIN specific, and the parts request must also be VIN specific to each individual vehicle.
Actual removal of the incorrect harness and installation of the correct wiring requires approximately four hours of labor according to GM. The replacement is to be carried out free of charge to the customer.
Affected 2023 Chevy Silverado 1500 owners who have questions regarding the replacement can call Chevrolet’s customer service number, referencing the GM customer satisfaction program number below.
- GM Customer Satisfaction Program Number: N222391510
- Chevrolet Customer Service: 1-800-222-1020
As a reminder, the 2023 Chevy Silverado 1500 is offers a range of different available powerplants. The base engine is the turbocharged 2.7L I4 L3B gasoline engine developing 310 horsepower and 430 pound-feet of torque. This is followed by the atmospheric 5.3L V8 L84 gasoline engine, rated at 355 horsepower and 383 pound-feet of torque, and the atmospheric 6.2L V8 L87 gasoline engine, which delivers 420 horsepower and 460 pound-feet of torque.
The “second iteration” of GM’s 3.0L Duramax, the 3.0L I6 LZ0 turbodiesel, is new for 2023 and takes the place of the previous 3.0L I6 LM2 turbodiesel. The new diesel motivates its host truck with 305 horsepower and 495 pound-feet of torque.
The L3B engine is paired with the GM eight-speed automatic, while the L84, the L87 and the LZ0 powerplants transmit power via the GM 10-speed automatic.