General Motors has released a new service bulletin for the 2023 Chevy Colorado to address a moaning or howling noise heard around the rear end of the pickup. The service bulletin was initially released last November, and is tagged with bulletin number 23-NA-208. The bulletin only applies to 2023 model-year vehicles.
The new bulletin states that some 2023 Chevy Colorado customers report that their pickup emits a howling, moaning, or growling noise around the rear end of the vehicle. This noise may be caused by the outer bearing surface on the rear axle shafts, which could have machining chatter on the surface for the bearing.
According to the bulletin, techs are advised to pull the axle shafts if the differential carrier bearings are not the original cause of the sound. If the tech observes chatter marks on the axle shaft, then it’s recommended that the seal, the bearing, and the axle shaft are replaced. It’s estimated that the labor time required to address this issue could take around two-and-a-half hours if the axle shaft needs to be replaced.
For readers who may be unaware, the 2023 Chevy Colorado is the first model year of the pickup’s latest third generation. The all-new 2023 model year debuts a new exterior design, a new cabin, a new turbocharged engine, and more.
The trim level lineup was updated as well, and now includes the Trail Boss trim, which was previously offered as a package upgrade for LT and Z71. There’s also an 11.3-inch color infotainment screen in the cabin, plus several standard safety items, including Forward Collision Alert, Automatic Emergency Braking, and Front Pedestrian Braking.
Three engine options were offered for the 2023 model year, including the Turbo 2.7L I4 L2R gasoline engine, the Turbo Plus 2.7 L I4 L3B gasoline engine, and the Turbo High-Output 2.7L I4 L3B gasoline engine. The Turbo Plus 2.7 L I4 L3B engine option was deleted for the 2024 model year, per previous GM Authority coverage.
Under the skin is the updated 31XX-2 platform provides, with production taking place at the GM Wentzville plant in Missouri.
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Comments
This is the sort of thing that gives GM a bad name.
How long have they been using rear drive vehicles?
With all the reliable rear ends out there is this a new design? If it is why?
We don’t want to spend time in the service shop especially with a new vehicle!!
Dito!
I have a 2022 SIERRA 1500 12,000 MILES no problems.
Don’t care. At all. No manual transmission with 4WD? Sorry, I’ll just keep my other 6 vehicles.