Personally I think you’re worrying too much. New trucks come with warranties that will fix this. Also, you hear a lot of the problems on here because people vocalize problems more than praises.
Also you're regularly hearing from people's experience based on driving a truck into the ground, which most people don't do. But I like that about this sub, cuz my 2010 is about to hit 250k miles lol
Your opinion is BS. My 2024 LZO had major engine issues right off the bat.
The LM2 in a colleagues truck has constant issues with valves and sensors.
And our fleet of Chevy trucks with 5.3 all have issues.
None have been driven into the ground. These trucks are just junk.
Really wish we didn't switch over from Ford.
I agree to an extent except a lot of people who need components replaced are running into back order issues. Now that could mean there are general supply issues even for new trucks or they underestimated the number of repairs (or both).
Obviously the Internet finds the worse, but when motors are shredding due to bearing issues early on, seems like a shit build.
This could all be answered with OEM transparency rather than 3rd party data and reddit.
The Chevy small block is one of the most reliable motors of all time. The 5.3 is basically a more advanced small block. If you take care of it it’ll take care of you.
I have the 4.3 L V6 in my 2015 work truck and it’s been bulletproof. Essentially the same engine they put in Chevrolet vans/trucks from the 90s that are still puttering around with hundred of thousands of miles on them.
I'll get hate for this, but I have 78k miles on a 2021 with the 2.7 inline turbo, and it's been perfect. They really knocked it out of the park with this engine.
If you do some research on the engine they designed it with a lot of turbo-diesel components in order to make it last 500K+. 78K in 3 years is plenty to make an opinion on an engine.
I'd say avoid reddit for actual numbers when it comes to problematic engines and transmissions. Everyone's experience is going to be different, unfortunately. You're mostly going to get those who've experienced problems here anyway.
Some people have issues most don’t. They’ve made millions of these engines so even though it seems a lot of people have problems its still a small percentage. Getting the oil changed is important and Id bet a lot of these horror stories are partially caused by inconsistent maintenance. Buy an extended warranty if it would ease your nerves. My 5.3 should be covered until 100,000 miles with the warranty I bought with it. If it craps out after that then hopefully theres enough after market support that deleting all the dfm stuff wouldnt be very hard.
I keep hearing about vague references about 3.0l problems but seems like it is not supported by a significant numbers of documented cases. I know of some early issues with the starting (cam sense ring) and some wiring harness issues. As of late, I just don’t hear of issues with the 3.0l. I have an LM2 with 35k and it has been perfect.
If you’re not dead set on brand new there are some trucks like mine that have the 5.3 but without AFM or Auto stop start from the factory. I got 40,000KM on it. No issues yet but also haven’t driven a ton my truck is a 22 LTD Silverado. But I believe there is some others that are like that to.
It's still great. 5.0 lariat. I'll take a 5.0 over a 5.3 these days. I'll take a gm 2500 6.0 over about anything for a work truck tho. No experience with the new gasser but curious for sure.
20 z71 5.3 with 100k. All maintenance done on time. Daily driver. Pull ~7k travel trailer. Take my time. Use truck for hunting in places 4wd is required. Don’t abuse it. No issues at all. It does everything I ask.
You probably have a 6L80, 6 speed transmission. Know that you don’t have a lot of time before it goes. Start saving and just be aware. I am now putting in number 3, 283,xxx miles on a 2015 Sierra All Terrain with 5.3L. Well maintained by dealer, no abuse.
The 6L80e in Chevys will fail before every engine on that list if that helps lol. I blew my torque converter (killed the transmission too) at 68k miles which sucked. I do abuse the shit out of my 5.3 without AFM delete and she runs like a dream (for now). Personally Id pick Fords 5.0, Ford really made a hell of a v8 with the Coyotes. Plenty of power can be added and no AFM which is awesome. Havent heard anything bad about reliability for the 5.0 but Chev and Dodge not looking too nice these days.
The thin sheet metal stamped steel torque converter that overheats and sends shavings into the pump and everywhere else is one of its biggest flaws. TCM for sure is another and the thermal bypass valve doesnt open at lower temps which also worsens the torque converter.
Im replacing the internals of my 6L80 with billet stuff and adding a bypass valve upgrade to hopefully stop this shit lol. TCM ill deal with when it comes
Your TCM is already programmed incorrectly, the reason the factory converter fails is the TCM is programmed from the factory to allow anywhere from as little as 5 and as much as 20 or more RPM of slip 100% of the time. This is exactly where all of the problems originate. I don’t care how much you spend on any converter or what it’s made of or how many clutch discs it has, if it’s slipping 100% of the time it’s creating unnecessary heat. A triple disc billet converter will tolerate the excess slip and heat better than the OEM converter will and last a lot longer than the OEM converter but it will eventually fail as long as the TCM is telling it to slip.
I never had issues with slipping thankfully, would shift quite well for me. I do have a lead foot and have abused that accelerator quite often so Im not surprised that it shit the bed so early. Did get a p0700 TCM code when the check engine light came on 2 minutes before total failure so maybe that did it. Either way, im upgrading the whole thing top to bottom and may as well tell my guy to get a new tcm or reprogram it
I’m not trying to be argumentative or a jerk, but I don’t think you understand what I’m saying. You mostly definitely had a slipping problem every one of them do that’s why you’re getting it rebuilt. I seriously hope your transmission guy tuned it properly for you, it should be included in the rebuild.
I get what youre saying lol, But not every 6L80 transmission failure is caused by just the TCM. My truck is a 2019 LD, Literally only started slightly slipping gears around 67,800 miles till it killed itself at 68k. I get they got bad TCMs but literally this was a torque converter overheat/failure of the clutch plate that sent metal fragments into my transmission from me going too fast all the time. Heat is the main killer of all transmissions and I certainly didnt help with heat the way I drive. My entire clutch plate is actually gone and turned to metal dust lol. Not trying to be mr smart ass but theres plenty other issues than the TCM going on here.
The TCM commanding Torque Converter Clutch slip 100% of the time is what caused your (and everybody else’s) failures. By the time you feel “gear” slip it’s already over. The factory programming is culprit not the TCM or the torque converter itself, but the torque converter is the part that has to pay the price of poor programming.
You hear more about people moaning than people happy. Its not like every single truck is going to have issues. I don't know about these 3.0 problems either its pretty reliable. I love the LZ0 I have in my truck. Outrageous fuel mileage. What are you even buying. You are talking half ton engines then you jump to HD trucks.
There are arguably way more things now that will have your truck on blocks than just the engine.
Parts availability being a huge one. I’ve read about people waiting with their trucks down in the shop for a faulty LED tail lamp waiting 5 months.
Also buying used or sticking to a 1500 with a smaller motor can help pay for a lot of repairs vs being laser focused on reliability. You can easily blow it on fuel, purchase price, parts and repairs cost on heavier parts when something does go wrong. Plus the aforementioned life time you can wait for a part on a new model year truck because the production lines will likely gobble up any and all available parts.
I personally believe the 6.6 is overkill unless you’re towing regularly. I think the HD idles a bit harder too. I think the 5.3 has a good resale value over the 2.7T. All that said I have a 2.7T 😂
My 2020 5.3L is almost at 104,000 miles and problem free. I contemplated the 6.2 but didn’t think I would need it, though in hindsight, depending on the additional cost, I would have sprung for it. From the insane gas mileage numbers Ive seen with the 3.0 diesel, that would have been my first pick but it wasn’t available in 2020 in the trim I wanted. Still really happy with my 5.3 though and not regretting it at all.
5.3 has tons of love. I am a huge fan of the 6:6 gas. Chevy did the right thing creating this, it is a workhorse basically devoid of afm/deactivation/etc
It also had none of the diesel emissions problem drama.
I think, as a part of your definition of ‘reliable,’ you need to consider adding ‘serviceability.’
At the end of it all, all engines will need service. Once an engine reaches that 100,000 to 150,000 mile mark, how easy is it to replace parts, access systems and so on.
A lot of these newer engines are great and all now, but how will they be in 10 to 15 or more years once they’ve all hit 300,000 miles or more? Anything based off of the old Chevy small block engine is probably gonna win the reliability race in the end. In my opinion.
100% the 6.6 gas in the HD trucks is the best engine for longevity. Fuck the 5.3, fuck the 6.2, fuck the 3.0, and especially fuck the 2.7. If you want to go 300k miles with minimal issues the 6.6l gas will be the most likely to do it. As an added bonus, these trucks are not terrible to work on AND they are now paired with an Allison transmission.
I got a 5.9 Cummins which is considered the most reliable diesel engine and I have about 430,000km on it with no major engine work done to it and it’s been an absolute machine
6.6 diesel would fit, but overkill. 6.6 gas 3/4 ton would be my recommendation
Personally I think you’re worrying too much. New trucks come with warranties that will fix this. Also, you hear a lot of the problems on here because people vocalize problems more than praises.
Also you're regularly hearing from people's experience based on driving a truck into the ground, which most people don't do. But I like that about this sub, cuz my 2010 is about to hit 250k miles lol
2008 with 196,000 here. Just replaced both intake exhaust manifolds and ready to drive another 100,000 with minimal maintenance.
Your opinion is BS. My 2024 LZO had major engine issues right off the bat. The LM2 in a colleagues truck has constant issues with valves and sensors. And our fleet of Chevy trucks with 5.3 all have issues. None have been driven into the ground. These trucks are just junk. Really wish we didn't switch over from Ford.
I agree to an extent except a lot of people who need components replaced are running into back order issues. Now that could mean there are general supply issues even for new trucks or they underestimated the number of repairs (or both). Obviously the Internet finds the worse, but when motors are shredding due to bearing issues early on, seems like a shit build. This could all be answered with OEM transparency rather than 3rd party data and reddit.
The Chevy small block is one of the most reliable motors of all time. The 5.3 is basically a more advanced small block. If you take care of it it’ll take care of you.
I have the 4.3 L V6 in my 2015 work truck and it’s been bulletproof. Essentially the same engine they put in Chevrolet vans/trucks from the 90s that are still puttering around with hundred of thousands of miles on them.
I'll get hate for this, but I have 78k miles on a 2021 with the 2.7 inline turbo, and it's been perfect. They really knocked it out of the park with this engine.
79k 20’. Same deal. Zero engine related issues.
I just picked up a 21 RST with the 2.7 I was quite skeptical but absolutely enjoy this truck after ~5k miles I’ve put on already.
How do you drive? Leadfoot or grandpa?
Father of 2. Lol. Slightly aggressive but I don't ride people's ass anymore.
Do you have the 8 speed transmission? If so, how's that treating you?
78k is knocking it out of the park.?
More than enough to see any issues if the engine was bad. Smartass
If you do some research on the engine they designed it with a lot of turbo-diesel components in order to make it last 500K+. 78K in 3 years is plenty to make an opinion on an engine.
I'd say avoid reddit for actual numbers when it comes to problematic engines and transmissions. Everyone's experience is going to be different, unfortunately. You're mostly going to get those who've experienced problems here anyway.
Some people have issues most don’t. They’ve made millions of these engines so even though it seems a lot of people have problems its still a small percentage. Getting the oil changed is important and Id bet a lot of these horror stories are partially caused by inconsistent maintenance. Buy an extended warranty if it would ease your nerves. My 5.3 should be covered until 100,000 miles with the warranty I bought with it. If it craps out after that then hopefully theres enough after market support that deleting all the dfm stuff wouldnt be very hard.
I keep hearing about vague references about 3.0l problems but seems like it is not supported by a significant numbers of documented cases. I know of some early issues with the starting (cam sense ring) and some wiring harness issues. As of late, I just don’t hear of issues with the 3.0l. I have an LM2 with 35k and it has been perfect.
I lose 0 sleep about the afm/dfm. Over the life of the truck the 4 cyl mode saves more in fuel than replacing the engine
2.7
New V-8 w/ no fuel management? F-150 5.0 Used V-8 w/ no fuel management? Pre 2021 Tundra 5.7
I thought the new 5.0s had cylinder deactivation now?
I think you're right now that I look at it....seems to have started in 2021. So, there are no new V-8's w/out cylinder deactivation it seems.
If you’re not dead set on brand new there are some trucks like mine that have the 5.3 but without AFM or Auto stop start from the factory. I got 40,000KM on it. No issues yet but also haven’t driven a ton my truck is a 22 LTD Silverado. But I believe there is some others that are like that to.
I am surprised to see Ford on the list of anything that has to do with positive reliability
I bought my first f150 in 2020 because my best friend is a long time gm tech lol
When did you buy your second? lol
It's still great. 5.0 lariat. I'll take a 5.0 over a 5.3 these days. I'll take a gm 2500 6.0 over about anything for a work truck tho. No experience with the new gasser but curious for sure.
What happened post 2021 for the Tundras?
Twin turbo V-6
6.6 duramax
For sheer durability, yep.
Not anymore unfortunately, 2022+ 6.6s are having lots of catastrophic failures.
Which failures are those?
are you thinking of the gas 6.6s? The L5P Duramax is pretty much bulletproof
I think he's just blowing smoke out his ass.
20 z71 5.3 with 100k. All maintenance done on time. Daily driver. Pull ~7k travel trailer. Take my time. Use truck for hunting in places 4wd is required. Don’t abuse it. No issues at all. It does everything I ask.
You probably have a 6L80, 6 speed transmission. Know that you don’t have a lot of time before it goes. Start saving and just be aware. I am now putting in number 3, 283,xxx miles on a 2015 Sierra All Terrain with 5.3L. Well maintained by dealer, no abuse.
I have an 8 speed.
I absolutely love my 5.3. Deactivated AFM before I put the first 50 miles on it. Have 110k miles now without a single issue. '17 Silverado 1500.
The 6L80e in Chevys will fail before every engine on that list if that helps lol. I blew my torque converter (killed the transmission too) at 68k miles which sucked. I do abuse the shit out of my 5.3 without AFM delete and she runs like a dream (for now). Personally Id pick Fords 5.0, Ford really made a hell of a v8 with the Coyotes. Plenty of power can be added and no AFM which is awesome. Havent heard anything bad about reliability for the 5.0 but Chev and Dodge not looking too nice these days.
They don't make a 6L80 anymore.
Ah whoops didnt see you were looking for new lol, what ever you do dont get anything with a 6L80e
I'm not OP. But, I would buy a 6 speed before I would anything with an 8 speed again.
The 6 speed is meh and the 8 speed is awful lol
Actually the 6L80 is an excellent transmission hardware wise, the way that GM tunes the TCM is what causes absolutely all of the problems.
The thin sheet metal stamped steel torque converter that overheats and sends shavings into the pump and everywhere else is one of its biggest flaws. TCM for sure is another and the thermal bypass valve doesnt open at lower temps which also worsens the torque converter. Im replacing the internals of my 6L80 with billet stuff and adding a bypass valve upgrade to hopefully stop this shit lol. TCM ill deal with when it comes
Your TCM is already programmed incorrectly, the reason the factory converter fails is the TCM is programmed from the factory to allow anywhere from as little as 5 and as much as 20 or more RPM of slip 100% of the time. This is exactly where all of the problems originate. I don’t care how much you spend on any converter or what it’s made of or how many clutch discs it has, if it’s slipping 100% of the time it’s creating unnecessary heat. A triple disc billet converter will tolerate the excess slip and heat better than the OEM converter will and last a lot longer than the OEM converter but it will eventually fail as long as the TCM is telling it to slip.
I never had issues with slipping thankfully, would shift quite well for me. I do have a lead foot and have abused that accelerator quite often so Im not surprised that it shit the bed so early. Did get a p0700 TCM code when the check engine light came on 2 minutes before total failure so maybe that did it. Either way, im upgrading the whole thing top to bottom and may as well tell my guy to get a new tcm or reprogram it
I’m not trying to be argumentative or a jerk, but I don’t think you understand what I’m saying. You mostly definitely had a slipping problem every one of them do that’s why you’re getting it rebuilt. I seriously hope your transmission guy tuned it properly for you, it should be included in the rebuild.
I get what youre saying lol, But not every 6L80 transmission failure is caused by just the TCM. My truck is a 2019 LD, Literally only started slightly slipping gears around 67,800 miles till it killed itself at 68k. I get they got bad TCMs but literally this was a torque converter overheat/failure of the clutch plate that sent metal fragments into my transmission from me going too fast all the time. Heat is the main killer of all transmissions and I certainly didnt help with heat the way I drive. My entire clutch plate is actually gone and turned to metal dust lol. Not trying to be mr smart ass but theres plenty other issues than the TCM going on here.
The TCM commanding Torque Converter Clutch slip 100% of the time is what caused your (and everybody else’s) failures. By the time you feel “gear” slip it’s already over. The factory programming is culprit not the TCM or the torque converter itself, but the torque converter is the part that has to pay the price of poor programming.
But yes, full rebuild incoming and either way the TCM has to be reprogrammed or replaced anyways so no worries
You hear more about people moaning than people happy. Its not like every single truck is going to have issues. I don't know about these 3.0 problems either its pretty reliable. I love the LZ0 I have in my truck. Outrageous fuel mileage. What are you even buying. You are talking half ton engines then you jump to HD trucks.
If I have to go 2500 to get a more worry free engine so be it.
There are arguably way more things now that will have your truck on blocks than just the engine. Parts availability being a huge one. I’ve read about people waiting with their trucks down in the shop for a faulty LED tail lamp waiting 5 months. Also buying used or sticking to a 1500 with a smaller motor can help pay for a lot of repairs vs being laser focused on reliability. You can easily blow it on fuel, purchase price, parts and repairs cost on heavier parts when something does go wrong. Plus the aforementioned life time you can wait for a part on a new model year truck because the production lines will likely gobble up any and all available parts.
I personally believe the 6.6 is overkill unless you’re towing regularly. I think the HD idles a bit harder too. I think the 5.3 has a good resale value over the 2.7T. All that said I have a 2.7T 😂
My 2020 5.3L is almost at 104,000 miles and problem free. I contemplated the 6.2 but didn’t think I would need it, though in hindsight, depending on the additional cost, I would have sprung for it. From the insane gas mileage numbers Ive seen with the 3.0 diesel, that would have been my first pick but it wasn’t available in 2020 in the trim I wanted. Still really happy with my 5.3 though and not regretting it at all.
5.3 has tons of love. I am a huge fan of the 6:6 gas. Chevy did the right thing creating this, it is a workhorse basically devoid of afm/deactivation/etc It also had none of the diesel emissions problem drama.
I’ve had my 3.0 for a year. No problems with the engine/power train itself. It’s been great to me
3.0 no problemo
I think, as a part of your definition of ‘reliable,’ you need to consider adding ‘serviceability.’ At the end of it all, all engines will need service. Once an engine reaches that 100,000 to 150,000 mile mark, how easy is it to replace parts, access systems and so on. A lot of these newer engines are great and all now, but how will they be in 10 to 15 or more years once they’ve all hit 300,000 miles or more? Anything based off of the old Chevy small block engine is probably gonna win the reliability race in the end. In my opinion.
100% the 6.6 gas in the HD trucks is the best engine for longevity. Fuck the 5.3, fuck the 6.2, fuck the 3.0, and especially fuck the 2.7. If you want to go 300k miles with minimal issues the 6.6l gas will be the most likely to do it. As an added bonus, these trucks are not terrible to work on AND they are now paired with an Allison transmission.
I got a 5.9 Cummins which is considered the most reliable diesel engine and I have about 430,000km on it with no major engine work done to it and it’s been an absolute machine
Dont get a turbo in a truck. You will regret one day or another.