I love my 2021 GMC Sierra Denali L3 Diesel.
However, I have had multiple issues with multiple error codes going off when driving in highway conditions. Seems like heat is a factor. Have had wiring harness replace a year ago. Been into dealership multiple times for weeks at a time. These numbskulls are always scratching their heads totally confused and stumped. I've had it.
Did my own research after going into low power mode on I-95 in downtown Jacksonville. Made it to a dealership fortunately.
Seems like the issue is due to wiring harness chafing and is described in the following TSB: https://static.nhtsa.gov/odi/tsbs/2023/MC-10247527-0001.pdf Also here: https://gm-techlink.com/wp-content/uploads/2021/12/GM_TechLink_20_Mid-October_2021.pdf
Has anyone else experienced this issue and if so, how did you ultimately get it fixed?
This should have been a recall item in my opinion
However, I have had multiple issues with multiple error codes going off when driving in highway conditions. Seems like heat is a factor. Have had wiring harness replace a year ago. Been into dealership multiple times for weeks at a time. These numbskulls are always scratching their heads totally confused and stumped. I've had it.
Did my own research after going into low power mode on I-95 in downtown Jacksonville. Made it to a dealership fortunately.
Seems like the issue is due to wiring harness chafing and is described in the following TSB: https://static.nhtsa.gov/odi/tsbs/2023/MC-10247527-0001.pdf Also here: https://gm-techlink.com/wp-content/uploads/2021/12/GM_TechLink_20_Mid-October_2021.pdf
Has anyone else experienced this issue and if so, how did you ultimately get it fixed?
This should have been a recall item in my opinion
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