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Sorry if this seems long winded but I want to provide as much info as possible. Just picked up a 2019 Silverado 1500 custom. Has the 4.3 V6 with the 6 speed transmission (6L80 I believe) The truck had 99 miles on it. Currently around 2500. No issues out of the gate, after about a week of driving I noticed a very delayed shift I think it was from 1-2 or 2-3. The engine revved 1-2k high RPM than normal before shifting. a few days later while on the highway (cruise set at 75mph) out of no where the RPM’s spiked as if it had downshifted. There was no additional load on the engine to cause this, like going up or down a hill. This happened a few times. I called the dealership immediately and brought the truck to them a few hours later. Got a loaner for a few days while they looked over it. They called me to come pick it up, said the tech noticed a little bit of rough shifting and said they “re-set” the shifting points. Since it was an intermittent problem for me I don’t think it arose for them. So I took the truck home, no problems. My wife drove it to work that same night and the same problem happened again. This time the engine light came on. I scanned the codes this morning and the ECM showed P0700 (transmission control system the TCM showed P2714 pressure control solenoid D performance/stuck off. So back to the dealer it goes, waiting for them to bring me a loaner this time. I was was told by a dealer technician that GM has been having them put a different type of transmission fluid in some of these trucks due to issues with the torque converter. But I guess if a solenoid is stuck it could be due to a fluid issue as well? Just speculating. I’m curious if anyone else has had similar issues. I haven’t had much luck finding anyone else online with the same problem. Which is guess is more of the reason I’m posting this, in case there’s someone else lost like myself. I will keep this updated when I get further down the road with the dealership. I get that there are fluke problems that can arise, but this is a bit irritating considering it’s a brand new vehicle. I will say that the dealership I’m working with has been extremely supportive and not trying down play anything I’m complaining about. -
I have a 2010 Chevy Silverado 1500 2 wheel drive 4.3l v6 and the transmission went out yesterday. I was wondering what transmissions are interchangeable with my truck. Please help.
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Hope nobody minds, but I'm going to start up a Quick Reference Guide for common parts/fluids/bulbs for the T1 HD trucks. I'll try to keep it updated if anything changes. If a mod wants to sticky it, I'm down for that too. Owners Manuals Chevrolet: https://my.chevrolet.com/content/dam/gmownercenter/gmna/dynamic/manuals/2020/chevrolet/silverado-2500-3500/2020-chevrolet-silverado-owners-manual.pdf GMC: https://my.gmc.com/content/dam/gmownercenter/gmna/dynamic/manuals/2020/gmc/sierra-2500-3500/2020-gmc-sierra-owners-manual.pdf Diesel Supplement: https://my.chevrolet.com/content/dam/gmownercenter/gmna/dynamic/manuals/2020/chevrolet/multimodel/2020-6.6-duramax-diesel-supplement.pdf Oil Changes 6.6 gas L8T (VIN code "7") Capacity: 8 Quarts AC Delco Oil Filter: PF63E / 19383806 Drain Plug Size: 12X1.75X18.15 6.6 Diesel L5P (VIN code "Y") Capacity: 10 Quarts AC Delco Oil Filter: PF26 / 89017527 Drain Plug Size: 12X1.75X18.15 Engine Air Filters 6.6 Gas: A3244C / 84121219 6.6 Diesel: A3248C / 84554703 Engine Fuel Filter 6.6 Diesel L5P: TP1015 / 23304096 Interior Filters Passenger Compartment Air Filter: CF185 / 13508023 Wiper Blades Drivers & Passenger Sides: 23387857 Spark Plugs 6.6 Gas L8T: 41-114 / 12622441 Glow Plugs 6.6 Diesel L5P: 68G / 12690238 Fuel Tank Sizes 6.6 Gas L8T, All Box/Cab Configurations: 36 Gallons 6.6 Diesel L5P Standard Box Double and Crew Cab: 29.4 gallons 6.6 Diesel L5P Long Box Regular/Double/Crew Cab: 28.0 gallons Diesel Exhaust Fluid Tank Capacity: 7 gallons Automatic Transmission Fluid 6L90 6 Speed MYD (Gas engine): DEXRON-VI Automatic Transmission Fluid 10L1000 10 Speed MGM/MGU (Diesel engine): DEXRON ULV Automatic Transmission Fluid. Transmission Capacities (Approximate): 6L90 6 Speed MYD (Gas engine) Pan Drop: 6.0 quarts Overhaul: 10.5 quarts Complete System: 12.4 quarts 10L1000 10 Speed MGM/MGU (Diesel engine) Overhual: 20.6 quarts Complete System: 22.08 quarts Transfer Case Fluid Electronic Shift Non-Autotrac MP 1625/1626–NQF: Dexron VI Electronic Shift Autotrac MP 3025–NQH: Dexron VI Transfer Case Fluid Capacities Electronic Shift Non-Autotrac MP 1625/1626–NQF: 2.4 Quarts Electronic Shift Autotrac MP 3025–NQH: 1.6 Quarts Brake System Hydraulic Brake System (Vehicles with DOT 3 brake fluid): DOT 3 Hydraulic Brake Fluid Hydraulic Brake System (Vehicles with DOT 4 brake fluid): DOT 4 Hydraulic Brake Fluid Wheel Lug Nut Torque All Models: 140 lb-ft / 190 N-m Front Axle 9.25" Axle Lubricant: 75w85 Synthetic High Efficiency Lubricant, 10-4091 / 19300457 Capacity: 1.9 Quarts Rear Axle 11.5" Axle Lubricant:75w90 Synthetic Lubricant, 10-4016 / 88900401 Capacity: 3.17 Quarts Rear Axle 12.0" Axle Lubricant:75w90 Synthetic Lubricant, 10-4016 / 88900401 Capacity: 3.17 Quarts -
Anyone have issues with shifting between 2nd to 3rd and the truck revs up about 750rpm, or 1000 when towing then catches? Dealer told me it is normal but it has been progressively getting worse over time. Never did it when first bought it but started around 10,000 km doing it weekly where now at 60,000 km does it multiple times daily. Warmer weather does cause this to occur more often and harsh. Brand new transmission as well installed which never made a difference. Doesn't seem right to me as you can really feel when towing the stress on that shift. Wondering to the crazy flare up when under load would cause a bent engine rod recently around this transmission b.s. -
Hello T1XX owners, Did anyone put a dipstick in there 8L90e transmission yet? I would like to get a dipstick but am not excited about spending $180 and putting three holes in my new truck. B&M makes one that works but $180 seems like a lot(also three holes). Has anyone taken one from a Camaro and put it in? They have the same trans but different motor. so it might fit the trans but the bolt location might be different. My question again is, has anyone did it yet? What did you buy? How do you like it?
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my transmission when I disconnect the cooler tube on the top of the radiator to go to the transmission no transmission fluid comes out and it's showing a code P O 894 I just recently had the transmission rebuilt it's got about a hundred sixty thousand miles on it when I had the transmission rebuilt it had 130000
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2018 Colorado transmission issues
Kenneth Haines posted a question in 2015-2020 Colorado & Canyon Troubleshooting
Question to all new truck buyers who bought a 2018 Chevy Colorado, you having any transmission issues, like slipping between 2nd and 3rd gear on the automatic floor shiftier or problems with the + and - buttons ? -
Hello, Has anyone else experienced any shifting issues on their 2019's? The big one I seem to get a hard shift point around 2-4k RPM coming off a stop under light gradual acceleration shifting from 1st to 2nd gear. It's fairly random but seems to be more common after the transmission heats up 150-160 degrees or more, though it'll happen cooler too. The other is when feathering the throttle in traffic the downshifting seems a little harder than it should be, not as hard as the upshift and it doesn't clunk like my old 16' but it's a feeling like driving over a small bump occasionally but it's happened enough while watching the RPM needle shift to think it's not just the coincidence of running over a little bump. Typically during low traffic speeds < 30mph. All in all, the transmission is a vast improvement and is way smother compared to my clunky 2016 5.3L 6 speed Z71 which I traded in with 35k miles after valve sticking issues and a transmission rebuild replaced a fair bit of the transmission (torque converter, valve body, transmission pump). I cant tell if i'm just sensitive to the transmission or if I have something worth pursuing, service department says to give it 1500/2000 miles while the truck is "learning" as mentioned in other threads, I currently have just shy of 1100. After that I dread the "normal behavior" discussion. Overall it's a great truck, really smooth overall and a beast on the open road, in fact it's so smooth most of the time I think it might make the slow speed hiccups seem worse than they are. It's just a concern knowing that if it starts shifting issues at 500 miles, what's it gonna be doing at 20k miles etc.. Thanks everyone for reading! What's your experience? 2019 Silverado 5.3 V8, 4x4, Z71, RST
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Hi, I have an 03' Yukon XL AWD with a 4L60E transmission. Does anyone know the torque specs for the transmission mount? From what I have found. the bolts that attach the mount to the transmission get tightened to 18 ft/lbs. However, I cannot find the torque for the nuts for the studs that go through the crossmember. The mount part # is 15113134 and here's a photo of it. Thanks! -
Just wanted to post on here, as I have seen no less than a thousand posts with questions about the 6L80E, specifically about the power threshold of a stock unit. I have a 2014 GMC Sierra SLT Crew Cab Standard Bed stock 3.42 gears stock drive shaft stock 20" rims/tires 6.2L fully forged top/bottom end "Armageddon Twin Nagasaki's" (GT3582R's) e-boost 2 gauge Z06/LT4 fuel system 365lph in-tank Armageddon fuel pump QTP exhaust cut-outs and laid down 965rwhp/850 rwtq on a mustang dyno with 18psi on 116 race fuel (cut-outs open). I say all of this because the stock transmission detonated the 4-5-6 shaft (intermediate hub) near the splines. I took it to a "race shop" that said they would upgrade as much as they could; and was told at the time, there were limited aftermarket parts available for the 6L80E. This was mid 2018 with less than 10K miles on the truck and about 500 miles on the engine/turbo build and I discovered that was not entirely true. I drove the truck after their work, with "spirited road driving" while the roads were wet no less. Long story short; they f'd me and I detonated the 4-5-6 stock intermediate shaft again within 100 miles and no traction at all. They apparently replaced all parts that were broken with stock parts! Moving on, I took my truck to a different shop and researched my a** off and found PATC Transmissions. I had a warm and fuzzy after speaking with them and ordered the Phoenix Level 4 Master Rebuild kit among a few other minor accoutrements and re-tuning of my TCM by Mike from Century Automotive. It is now APR 2019 and I am about 1 1/2 weeks away from having the my billet planetary gear mailed to me; for the new, more reputable shop in my area to install all of this PATC bada**ery. If anyone is truly interested, I will post new info once I put the new Phoenix Master Rebuild kit through the ringer with the full weight/horsepower/torque of my particular application...I hope this helps if there are some lost souls out there that may be headed down the same long. hard. road. of a "full send" like myself! Please post if you have questions/comments/concerns; as I have "been there done that and forgot the t-shirt" with the L86/6L80E so far.
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I'm trying to buy a 2004 Silverado 1500hd with the 6.0 and 4l80e. When test driving the transmission would shift through all the gears fine but if you let off the gas as soon as the rpms hit 2000 they would drop to 1500 to 1000 and there would be a loud grind/whine until you tapped the gas again. I'm assuming it's the transmission, maybe the torque converter. Any help would be great so I can figure out if the transmission would have to be rebuilt or if it's something simpler to fix -
So my new to me 2014 Silverado with 95,000 miles just lost its transmission in the first week of me owning it. In calling around to local transmission shops the general consensus is that these transmissions will only reasonably last 80 to 100 thousand miles without either the pump or torque converter going out. Anybody have any thoughts or similar findings?
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John Goreham Contributing Writer, GM-Trucks.com 4-25-2019 Back in December, GM-Trucks.com member Jammin87SS posted a note here about a class-action suit related to GM 8-speed automatic transmissions. This transmission was used widely by GM, including in the Sierra, Silverado, Colorado, and Canyon pickup trucks. Owners have been complaining of shuddering and hesitation. Owner of a Silverado, Ed T., wrote a typical description for CarComplaints. He says, "Ever since I bought this truck new there has always been a shifting problem. This problem occurs whenever I slow down to a fairly low speed and then accelerate. When I accelerate there is a hesitation for a second or 2. This is very annoying and could potentially be dangerous. I have contacted my dealer and he just says "that's the way they shift, no fix"??? Dealer also stated that the transmissions have a learning chip and shifts the way a person normally drives - that's total BS. I have had my truck for over 2 years and it still shifts poorly. Besides the above I love my truck very much, GM just has to fix this problem..." GM knows there is a problem. It has issued both notices to its dealer's technicians and also TSBs. However, it has yet to find a solution that works. There is a class action suit that you can learn more about here. Our questions for our members are; 1) Have you experienced any issues with your 8-speed, and 2) was the dealer able to fix it? Let us know in the comments below. -
Hello Everyone, New to the forum and need some help! I purchased a 2019 Silverado LT 5.3l 4x4 (new body style) about two months ago. I recently put on some bigger tires, rims and a 2" RC leveling kit. Shortly after installation, the engine light came on and the truck would not sift out of Auto to 2wd or 4hi. I'm also feeling some wonkiness in the back tires and transfer case...feels like it is stuck in 4hi on dry pavement. I had the codes pulled and something is causing a P189A and P1899 (transmission) errors to trigger. I did some research and found the issues could be a result of a speedometer calibration issue caused by the bigger tires. I was told a speedometer calibration unit should resolve the issue. I purchased an inline speedometer calibration unit from Hypertech, set the parameters and installed it. Unfortunately, the problem is still occurring. Any suggestions from anyone? Has anyone else experienced this? Thanks in advance for the help! Thanks Chris -
Hello everyone, Well I took my 2014 Chevy Silverado 1500 up to the dealership yesterday for transmission issues. When accelerating around 30mph the transmission makes a high whining noise around 2000 rpm almost like its slipping and the truck shakes back and forth. Then when on the interstate on cruise control around 65-70 you will hear a grinding noise every few minutes. Also when you slow down from the 60-70 mph range to around 30 mph and accelerate the grinding noise becomes more apparent. When I dropped the truck off yesterday I showed the service guy video of the grinding as well as what I believe to be slipping and he said "Yeah that sounds like it is slipping". Received a phone call this morning from the same service technician saying they were not able to replicate the issue. That the transmission guy said that is normal when it switched between V4 and V8 mode. It's amazing I have had this truck and driven it for 76000 plus miles and have never heard that whining or grind noise. I asked how long they test drove it and he said 10 minutes. I told him they need to drive it around longer and actually go on the interstate to hear and see what it is doing. This is not the first time I've taken my truck up there for transmission problems and I am not picking this truck up again until they find the issue. The first time was for rough shifting to which they said was normal. This is my first Chevy I ever have bought or owned. Bought it brand new from the dealer. I must say that with how I keep getting treated with the "can not replicate" issue as a scapegoat for not truly trying to satisfy the customer is getting old. Especially being I have videos in which you can see the rpms and hear the whine up and hear a grind noise. This will most likely be the last Chevy product I purchase. If anyone has any ideas and doesn't mind listening to the videos I have I would appreciate it. I will have to post a link to youtube since the video will be to big to post here. Thanks -
OK Here's my sound. Truck is up on jack stands and I'm turning the rear wheels. Camera is under transfer case. Squeaks like this when leaving standing start and eventually stops when going fast enough (20 mph). Fluid in transfer case is fresh. Thoughts?
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Anyone know what this noise is? It's very intermittent. Seems to do it most often between 40 and 50 MPH cruising with maybe a slight up hill. Never does it on coast or heavy acceleration. Very hard to tell where it's coming from. 20190521_191545_001.mp4 2014 Sierra Denali 1500 Crewcab, 5'8" bed 6.2 Litter 3.42 axle ratio about 118,000 miles -
Long time reader and first time poster. I recently started to have vibration issues with my 2015 Yukon Denali. It started after the last scheduled oil change and tire rotation. I noticed the vehicle vibrating quite often. I started paying more attention to it and realized there was a shudder in-between gears that became worse as the transmission warmed up. Took it to the dealer I purchased it at and it was a bit of a fiasco because they were backlogged and ended up taking it to another dealer who performed 2810175 (updated TCM with latest calibration and relearn). They handed me the vehicle and said all fixed. Took the vehicle home and it seemed to be ok but started noticing the shudder again. One question is after this, is it expected that there should be a relearn time for X miles while its relearning the shift adapts/pressures? Is there an estimated number of miles for this? It seems to shudder less often but when it does it seems worse than before. I've only driven it about 60 miles since the recalibration. I'm fully aware of PIP5337 and asked them about this but they said the TCC was not bad. The vehicle was purchased June of 2015 so its definitely manufactured before November of 2015 which PIP5337D mentions. As I drive it more and more, I feel less of a transmission shudder but more road vibration than I felt in the loaner 2016 Yukon SLT or my wife's Kia Soul. I'm wondering if its possible they rebalanced improperly. The road vibration seems to be at lower speeds. At higher speeds it is better but may just be the quality of the roads I am driving on at lower speeds. I do notice the TAC jumps about 100 rpm during most shifts and not sure if this is normal. It seems to do this when the TCC speed should be 0 (around 2000PM) shifts. I realize it would not be fully locked under 1600RPM. At this point, I am not really sure if I am just paying too much attention to every bump on the road or if there is an actual issue. Are there any objective ways to determine if there is an actual issue and express that in a way that will not completely annoy the dealer? I have already had to pull this vehicle from one dealer because they were so backlogged it would have been in the lot sitting for repair for 23 days. With that said, they planned on doing a tear down on it to inspect and thought it was the TCC. Any help or guidance is much appreciated. Thanks! -
I’ve got a issue that just started last night. I was driving home, pulled from a red light and engine revved pretty hard before shifting. That repeated all the way home. Every time I slowed down to 1st gear and had to start again it would repeat. When it did shift I didn’t feel any other gears change, just the one change. Part of this trip was on the interstate and at 65 MPH the RPM was about 2500. Trying to figure out if I have a speed sensor problem of some type issue not telling it when to shift or if I’ve got an actual tranny problem. I have very little mechanical knowledge and it’s my first GM vehicle I’ve ever owned for about 3 mos now. Also I did figure out when the RPM gets to right at where it should shift, I can let off and tap the gas and it’ll shift much sooner and smoother than if I just stayed in the gas. Also noticed the oil pressure increased when pressing the gas from about 40 to 60. Don’t know if this is normal but I’d never noticed it before. Maybe only noticed it due to being particularly observant cause I was having issue. Also, separate questions, I got a check engine light a few weeks ago saying something about both main banks. Shop said it’s most likely vacuum leak somewhere. Previous owner is very knowledgeable and said to change O2 sensors and probably was not a vacuum leak. Any advice on this as well? Thanks.
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I waited several extra months for the AT4's release to purchase my truck. Less than 1 day of light driving and 70 miles into my new truck the transmission started to slip in and out of gear. I pulled into a parking lot and when I shifted into revers the truck slowly rolled forward. Onstar had a flat bed tow truck there within an hour to bring the day old truck back to the dealer. The dealer can not start work on the truck until GM approves the new transmission. I am told that there is a lot of extra paperwork and approval because there are so few miles and it is a new truck. I would think that GM would want to maintain their customer loyalty and support their new designs before aggravating buyers of new trucks. I have been a lifelong GM buyer, but thinking that i should have gone with a Ford or Ram. Has anyone else had to wait for repairs on a brand new vehicle? -
Check engine light 2019 Silverado
5JB posted a topic in 2019/2020 Silverado & Sierra Troubleshooting
Anyone have a check engine light show up then go away and come back? Code uo129 lost communication with brake control module, UO101 lost communication with transmission Control Module. Went to bed with no check engine light, woke up in the morning for work and noticed the truck would not remote start. When I go in to head to work noticed check engine light. After work ran codes. Shortly after getting codes and using google to research check engine light was gone. Went for a drive never came back on. Woke up this morning it was on again. Can anybody relate? -
So driving the family to supper today in my 16 crew cab 5.3 nice hot 21*C day had the AC on and after driving thru some stop and go traffic for 20 min and getting to the restaurant I backed into a slightly up hill stall and pull forward to straighten out and back in again and we feel a slight shudder vibration. I checked the trans temp it was 88C and sat in park with the slight shudder and checked my transmission fluid it was slightly below the hot section but i was slightly rear end high. Came out to leave hour and a half later and could just barely still feel a slight shudder and it didn't get change with a rev of the engine. I drove it the 12km home and it felt normal no shudder at stop lights after we left. Im up to 106,000km and plan to get the transmission fluid changed and filter as I bought it with 72,000kms last april and am unsure now if the dealer did the transmission filter and fluid. Any ideas? -
I have an appointment to take my truck in for some transmission work next week for a vibration that started yesterday. At first it kinda felt like a loose wheel or a tire was going out of balance but throughout the day it got worse. If I'm in 8th gear cruising at any speed about every 20 seconds the whole truck shakes for a couple seconds and at every up shift it shakes when it grabs the next gear. If I run in manual in 7th gear I don't get any shaking at highway speeds just in 8th. Kinda feels like it maybe the torque converter? Anyone else experience anything like this. Truck just turned over 16k miles. Just curious what to expect for repairs if anyone else has had this problem. -
I have a 2007 Tahoe 2wd, 5.3L. The transmission gets hot, 190-200 degrees F, only when in overdrive. If I shift down to 3rd, the temp will start to decrease. Has anybody had this problem before or know of any solutions? Thanks. -
Hello all, so this weekend i took my 2000 Silverado out camping and on my 3rd day out i went to start the truck and warm it up and drove it around the campsite and everything worked fine, parked the truck and then grabbed the family and loaded up, went to shift from park to drive and the lever just fell loose, wont go into any gear from the shifter but if i get under the truck i can shift into all gears fine, then once in drive i can shift from drive to neutral reverse and park just fine but wont go to any gear from park, cable was replaced last year. No clue where to start but everything under the truck is connected and in working order. 2000 extended cab short bed 5.3l 4l60e. 2wd
