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Started By
Message
OB gearheads, help diagnose my engine issue.
Posted on 1/5/22 at 6:19 pm
Posted on 1/5/22 at 6:19 pm
So yesterday driving on the interstate I noticed the truck, 2016 GMC Sierra with 5.3, shuttering slightly while cruising. I was maintaining a constant speed on the interstate and at first it was hard for me to tell if it was the truck or small bumps in the road I was going over. Finally figured it was the engine. Also it is making a different noise now when accelerating, almost a whining noise, it is not severe, I had to turn the radio off to make sure what I was hearing. it is clearer today though.
There are no lights on the dash and it is intermittent but seems to becoming more prevalent.
TIA
There are no lights on the dash and it is intermittent but seems to becoming more prevalent.
TIA
Posted on 1/5/22 at 6:47 pm to GREENHEAD22
Shuttering bumpy feeling sounds like a whee balance issue. Not a mechanic but have had that issue many times on many vehicles. That’s all i got.
ETA - is it only at certain speeds? Like 65-70? Then smooths out again or is it constant no matter the speed?
ETA - is it only at certain speeds? Like 65-70? Then smooths out again or is it constant no matter the speed?
This post was edited on 1/5/22 at 6:48 pm
Posted on 1/5/22 at 7:07 pm to GREENHEAD22
My 2019 5.3L Chevy had a shift control module go out at about 9k miles and it was shuttering some, the RPMs were erratic but no whine sound. Mine was doing it when it was on cruise control. If I tried to slam the gas and make it do it it wouldn’t do it, it wasn’t acting like a trans slip but yet still felt like it.
Not sure if that helps or not
Not sure if that helps or not
This post was edited on 1/5/22 at 7:30 pm
Posted on 1/5/22 at 7:26 pm to GREENHEAD22
6 speed or 8 speed GH22?
I work at a GMC dealership and we have torque converter issues, sometimes they feel like you're driving over rumble strips.
I work at a GMC dealership and we have torque converter issues, sometimes they feel like you're driving over rumble strips.
Posted on 1/5/22 at 7:29 pm to GREENHEAD22
May have something to do with the Active Fuel Management. I’d have it scanned either way. There may be something in the history.
Posted on 1/5/22 at 7:30 pm to GREENHEAD22
Hate to tell you but that GM 5.3 specifically from 2015-2018 is a shitty engine.
I sold mine when the lifters started ticking because you can’t just repair one….it’s all at once ($4000) and of course, it happened at 65k miles and they told me it was normal….then at 100k (past my warranty) it was critical and the cam shaft would go out next.
frick GM tbh
I sold mine when the lifters started ticking because you can’t just repair one….it’s all at once ($4000) and of course, it happened at 65k miles and they told me it was normal….then at 100k (past my warranty) it was critical and the cam shaft would go out next.
frick GM tbh
Posted on 1/5/22 at 7:41 pm to GREENHEAD22
Just had the same thing happen to my 2016 Silverado in April at 103K miles. Turns out it was the transmission, specifically the torque converter coming apart, and it is apparently a common issue with that transmission model (6L80). Rebuild ended up costing 4K.
Posted on 1/5/22 at 7:45 pm to GREENHEAD22
my 2019 Sierra is doing the exact same fricking thing.
dropping it off tomorrow
dropping it off tomorrow
Posted on 1/5/22 at 8:04 pm to GREENHEAD22
Had the same "shuttering" noise/vibration with my '17 F150 with the 5.0. It also has a 6 speed trans. I drained the trans fluid, replaced with new and also added a friction additive. It helped immediately. But a year later it's back to doing it again. It hasn't gotten any worse or any better. I really could notice it when I was cruising along the interstate and would barely begin to give it gas. You could hear and feel it shutter ever so slightly.
No truck is perfect.
No truck is perfect.
Posted on 1/5/22 at 8:44 pm to GREENHEAD22
Had to change transmission on 2015 recently. Mechanic said it’s been pretty common in GMC from this time frame. Happened at about 85,000 miles. “Only” $3000 and change and a 3 year warranty from my guy, so not too painful.
Posted on 1/6/22 at 8:42 am to GREENHEAD22
it's the torque converter. you can have them change it.
Posted on 1/6/22 at 8:42 am to GREENHEAD22
These responses are really making me glad I went with a Tundra last year.
Posted on 1/7/22 at 3:03 am to GREENHEAD22
Sounds like both times my lifters went out on my 15
Posted on 1/7/22 at 9:13 am to GREENHEAD22
TCC shudder.
Get tranny checked and it is likely as simple as a fluid change.
Get tranny checked and it is likely as simple as a fluid change.
Posted on 1/7/22 at 11:11 am to GREENHEAD22
It's the torque converter. There is a class action law suit against GM years 14-18. Some people have had success replacing transmission fluid with higher viscosity oil, but that's just a patch. It will explode your transmission if you don't fix it.
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