2019 RST cylinder misfire

[Jimmyc2k2]

This started with service parking brake light coming on.  Then every light on the dash turned on.  Truck started running very rough. Took to dealer and they said only code that was populating was a cylinder misfire.  They've had it for two days and can't seem to pin point the issue.  Has anyone on here seen this before?  Thanks

[Diamond817]

Yes, it's a lifter failure. Just happened to mine at 25,000mls. The dealer should have been able to diagnose it almost immediately.

[lebag335]

Lifters

[Jimmyc2k2]

Thanks.  Dealer worked on it all day Friday and couldn't figure it out.  Go figure.  How long did your repair take?

[Diamond817]

19 minutes ago, Jimmyc2k2 said:

Thanks.  Dealer worked on it all day Friday and couldn't figure it out.  Go figure.  How long did your repair take?

They had it for a week because they were waiting on parts. GM only let them replace one bank of lifters instead of both. So, now when a lifter fails on the other side they have to take it apart again, and replace the other side at twice the cost. Makes sense to me.

Edited May 2, 2022 by Diamond817

[Jimmyc2k2]

Thanks for the info.  I bought mine new in October of 2018.  Just refinanced it and bought a 4/48000 mile bumper to bumper warranty through my local credit union.  Glad I did that.  Truck has 92000 miles on it now.