redline4
I'm huge in Japan
- Local time
- 12:50 PM
- User ID
- 5593
- Joined
- Mar 12, 2018
- Messages
- 13,271
- Reaction score
- 112,257
- Location
- Rosholt Wisconsin

@redline4 hey Ed, any common issues to look out for on a 2015 Sierra 1500 4WD with the 5.3L? Asking for a friend, quite literally.
Take a good look at the radiator core, especially at the corners. Look through the fan with a flashlight from under hood.
Any orange funk means it's leaking.
Make sure AC works. Put in lots of condensers.
Oil cooler lines can leak too. Can also see that from under hood, between engine and radiator.
Those are the trouble spots on them. Once fixed, can't say I've seen them back for a repeat.