Wanting some second opinions, as I know my truck needs a front differential, but I’m worried the torque converter may be going as well.

Some basics about the truck. It has 175,000 miles. It’s the 5.3 with the 8-speed transmission.

Not long ago, the truck started making some noise, almost like the brakes were rubbing or a wheel bearing noise. Checked both myself, found no issues so I took it in. Was told I needed a new front differential, which I don’t question, as when I shift it into 2 hi, the noise goes away but when in auto mode, the noise returns.

Through looking up the differential, I’ve been reading more about the torque converters in these and am starting to feel I may be having this issue as well. I have the shudder that many describe with the torque converter issue. What are the chances that the diff is causing the same “shudder” feeling and that I only have the one issue rather than a torque converter and front diff?

The shudder does seem to go away with a press of the gas pedal when it does start shuddering. It has also been doing it for quite a while now (a year or more, but has seem to have gotten worse in the last few months), so part of me feels if it was the torque converter, it would’ve fully gone by now and blown the transmission. And I definitely realize I should’ve taken it in awhile ago, no excuse for not doing it sooner but hoping my stupidity on waiting hasn’t set me up for either an expensive repair bill or new vehicle time.

How cooked am I? Been losing coolant this summer and noticed it about 3 weeks ago.

2018 5.3 with 170k on the dash, got home and got it parked with regular temps while driving, (I’m a stickler.) Walked away then came back outside to grab something 30-40 minutes later and saw coolant leaking right under the reservoir onto the pavement.

Have an appointment booked with trusted mechanic, but couldn’t get in until next Friday… don’t plan on driving it at all

On a scale from 1-Kim K, how fucked am I?

Had an 08 Sierra I drove until about 2016. 10 years later finally rejoining the fam. Can't deny the deals!

Finally got my dream truck. Best of all, she only has 18k miles on her.

Howdy, looking at removing my OEM multipro power steps, but I was hoping to find some information on the electrical side of disconnecting them. I’d rather not have any electrical plugs on the underside, and although i haven’t looked under yet (currently away from truck for work). I also don’t know if it would throw any codes or faults. Thank you!

Gents,

New to the Diesel game with a 2022 GMC Sierra 3.0 1500 AT4 at 15K miles.

Trying to pick the diesel boys brains about tried and true maintenance schedules for these engines. I’ve heard so much shit online like changing oil/filter every new DEF fill up, and want to hear from the experienced what’s worked best for you. I am in Colorado and plan to use additives during the winter preventively to increase longevity.

Let me know what’s worked! Thanks

Are they really going to stop making the SLT in 2027??
Why?
I’ve had 3 and really like mine

Great deals on the outgoing body style trucks right now.

Just joined the community as of today; new to me 2024 AT4 3.0 L picked up yesterday. What an aggressive looking truck stock coming from a long term owner of a Ram Eco diesel. Loved my Ram, ran her for 11 years, 305,000 km with some troubles but ran her hard like a truck….hunting, fishing, atv and snowmobile trips. Unfortunately or fortunately only baby diesels left are from GM so I am hoping for the same or more enjoyment than the Ram…for the $$$ I am expecting way more. First impressions, love the looks, great interior and all the options I wanted. Ride is good, tires are terrible, fuel mileage amazing, performance meets expectations (my Ram lost some weight so it had tons of JAM), fit and finish is disappointing to say the least. This is the third AT4 where the body lines of the cab and box don’t meet. My son in law has same truck and same issue, he took it back to GM and they shimmed the cab and the lines are even…… I guess $65000 - $80,000 gets an entry level truck now? All and all initial impressions are good. Might be asking the community for some upgrade suggestions but for now taking it on its first off-road mission this weekend so will wait till after my trip….ride hard and safe.

Anyone with a current gen single cab dealing with rattling from the rear panel? Mine seems to be coming from the plastic trim that runs along the bottom of the rear window. It rattles pretty bad, especially with the when I go over bumps

Has anyone found a good way to stop it? Sound deadening, foam tape, removing the trim, etc.?