GM has issued a customer satisfaction program for certain units of the 2023 GMC Sierra 1500 which were seemingly produced with an incorrect wiring harness installed. The incorrect wiring harness was also fitted to some units of the 2023 Chevy Silverado 1500.
Problems associated with the incorrect wiring harness include missing circuits needed to power specific features or pieces of equipment, which vary according to the trim level of the pickup and its options.
Very few 2023 GMC Sierra trucks in total were affected with incorrectly installed wiring harnesses. GM’s service bulletin lists the VIN numbers of three GMC Sierras in all, plus a trio of 2023 Chevy Silverado pickups similarly affected, giving a total of six vehicles for both nameplates.
GM instructs its dealerships to inspect 2023 GMC Sierra trucks which are suspected to be affected by the incorrect wiring harness installation prior to ordering parts. The dealer should order a suitable service cable kit from the Warranty Parts Center if the truck is in fact fitted with the wrong body harness for its trim level and equipment.
The replacement program launches 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.
The process of incorrect harness removal and subsequent correct harness installation takes about four hours of labor per GM estimates. The replacement is to be carried out free of charge to the customer.
Affected 2023 GMC Sierra 1500 owners who have questions about the replacement can call GMC’s customer service number, referencing the GM customer satisfaction program number below.
Contacts:
- GM Customer Satisfaction Program Number: N222391510
- GMC Customer Service: 1-800-462-8782
As a reminder, the 2023 GMC Sierra 1500 can be ordered with a variety of engine options. The base powerplant is the turbocharged 2.7L I4 L3B gasoline engine, rated at 310 horsepower and 430 pound-feet of torque. This is followed by the atmospheric 5.3L V8 L84 gasoline engine developing 355 horsepower and 383 pound-feet of torque, and the atmospheric 6.2L V8 L87 gasoline engine developing 420 horsepower and 460 pound-feet of torque.
The GMC Sierra 1500 has a single diesel engine option, the new-for-2023 3.0L I6 LZ0 turbodiesel, which produces 305 horsepower and 495 pound-feet of torque. The LZ0 is the “second iteration” of GM’s 3.0L Duramax and is the replacement for the outgoing 3.0L I6 LM2 turbodiesel.
As for transmission options, the L3B engine is offered with the GM eight-speed automatic, while the L84, the L87 and the LZ0 powerplants are paired with the GM 10-speed automatic.
Under the body panels, the 2023 GMC Sierra is built on the GM T1 platform, while production takes place at the GM Fort Wayne plant in Indiana and the GM Silao plant in Mexico.
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Comments
QC.
Never mind the economies of scale. Let’s spend development monies on multiple versions of a wiring harness. Let’s create multiple skus. Let’s create multiple points of UAW contract negotiations for installing multiple versions of wiring harness. Let’s source manufacturing of multiple versions of wiring harness.
All because using one version of wiring harness that covers all trim levels saves monies to the consumer, can’t have that.
Wait a minute!… just a minute… IF GM can’t seem to fix / reaplace a leaking rear slider window due to leaks!!! Its a known problem for lets say 8 PLUS years! I would have to say that engineer (Who says they couldn’t spell it yesterday BUT R one today!)/ supplier would have faced a dull axe. If you couldn’t fix a cracking / bonding agent..; ya gonna have a wire harness for multiple models… that extra wires and that may cost 3 cents per harness of profiteering… for some pension fund of engineers…. Ah huh..
I bet the floor comittee man over rode the installers concern as “Get IT out the dam DOOR!”
Its a GM Recall Now The Internet Keypad Warriors Will Turn 3 Vehicles Effected To 3,000,000 Vehicles Effected !
Hey GMA, since there are only six of these affected vehicles, is it too much to expect you to list the VIN in the article?
Make it 7 I have been fighting with GM they finally approved to replace the engine harness
Hope it fixes the issue
Only 6 total trucks effected? Why is this even news?
The article does not state how the 6 were found, but a service bulletin and customer was mentioned. So it is someone that had a bad day on the line whether that be harness assembly/labeling, parts bin stocking, or when the trucks ran down the line.
Most likely 6 customers so far that have reported, A huge number later, because the unreported VIN’s are stuck in Dealer Warranty Service hell where the customer is being told that they all do that, so no trouble found.
4 hours of labor.
There will be a lot of plastic tabs broken/cracked.
The service bulletin probably includes that the customer should leave the windows down or play the stereo really loud so that all of the squeaks and rattles that are caused from the harness replacement will be perceived has not even there
Transmissions are trash, they can’t seem to make a sunroof drain that works and now this. At least 10 years ago they were nice to look at. When you order your new harness you should order a tranny and some rocker panels while you’re at it. My 77 K5 has less rust than my 13 Sierra. Downward spiral.. at least my 07 Sierra didn’t burn up from the heated washer fluid.
I have one of the sierras. Bought 4 weeks ago haven’t got it home yet. Drove it 20 miles. Parts laying all over the floor. They say they are waiting on wiring harness