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Drives

Found 8 results

  1. I have a 2014 GMC Sierra SLT 4WD 5.3L. 3 days ago while driving home I noticed that there was a slight stutter/shudder when the truck was attempting to shift up to the next gear. It seems that it only happens when easing into the gear at a slower speed,normally around 50MPH or so,and occasionally continues to happen while maintaining those speeds. 89,000 miles on it. I bought all the stuff do change the transmission fluid and filter but was hoping somebody could give me some alternative ideas to check before diving down that rabbit hole. Really needs this fixed ASAP, I’m a firefighter and this is my vehicle I commute to work in. Thanks in advance for any help.
  2. I have a 2004 Chevrolet Silverado 1500 4wd with the 4L60-e 4 speed transmission. Currently I have no speedometer and despite the transmission shifting very well, it skips second gear consistently (no intermittent functioning). This is the ONLY gear that it has issues with (reverse and the rest of the gears are good). Here is the story... I bought this truck being told the transmission was shot. Initially it would not shift past 1st and also had a functioning reverse. I had the tranny swapped with an equivalent from a suburban. It improved slightly but still there is no speedometer or second gear. NO ENGINE CODES have come up throughout this entire time including prior to tranny being swapped (this includes no ABS lights). Here are the different problems I have found on the internet that I have tried to rule out: VSS- A mechanic with a good computer states that all 3 Vehicle Speed Sensors read correct speeds in real time on the road Ignition switch- Already changed Fuses/relays- All appear to be intact and functioning Dash cluster- broken connections fixed restoring all function besides speedometer Transmission treatment- Lucas treatment put in in case this could be a sticky solenoid to no avail Grounds- All appear to be in excellent condition and no frayed wires visible Low Voltage- New battery in place Help me out! What I can see as being my next options are either changing out the ECU or the wiring harness, neither of which I am desiring to do. Any recommendations from your experience that I may have missed in my internet reading?
  3. Good day, I have a 2012 GMC Sierra 1500 Z71 4x4 SLT. Latley I have had an issues with the shifting. Most of the time all is good, but when I'm going between 35 and 40 and let off the gas then give it some gas it hits real hard. It does the some what of the same when I am on the highway going about 70 and I give it more gas. On the highway it seems to down shift ( feels like I'm stopping) than shifts hard. The transmission was just rebuilt and I just replaced the tps and cleaned the throttle body. I at a loss and am running out of money to throw at it. The transmission shop ensures me it is not the shift soleniods, he says if it was I would have a lot more shifting issues than I currently have. Also, the check engine light does not come on and there are no codes in the history. Any help would be appreciated
  4. 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
  5. I have not seen a whole lot posted on this and tried to search first. Recently I started noticing a rough shift pattern. I can't tell if its 2-3, 3-4 or 3-4,4-5. It is under light acceleration and been a bit colder. It seems to lurch when making those two shifts. I need to do some driving to test further to see if it progresses through the rest of the shifts or clears up after warmed up. Curious if anyone else has run into this and if there are any troubleshooting steps I can do without any special tools/scanners. I am due for a scheduled visit to the dealer and will have them look into it but found the more information I can provide them the better. Still under powertrain warranty (5 year/100k) I don't have the TCC shudder anymore after the latest fluid change about a year ago but I have gone through a few fluid changes and a TCC replacement. I have read where if this clears up when its not cold that may be expected. I'm wondering if I have a solenoid starting to freeze. Probably not a lot I can do without a scan tool that can read from TCM but thought I'd ask.
  6. I have a 2015 GMC Sierra Single Cab 4.3L V6. Pulled into the parking lot at work this morning with no issues. Went to back into a parking spot and when I shifted into reverse, EVERYTHING in the cab shut off for about 3 seconds. When it came back on I had an airbag alarm and a stabilitrak alarm. I backed into the spot without issue. As far as I could tell the drive-train was fine. I have the convenience package which is basically the backup camera, Bluetooth, and On-Star. Anyone else come across this issue or anything similar?
  7. Hey guys this is my first time posting on the forums, recently bought a 2003 gmc 2500 6.0 gas. 4x4 So last owner got stuck in his driveway and had bypassed the mechanism by breaking the tumbler & started the truck via the ignition switch (already checked if it was stolen lol). i think he played with a few wires to bypass the security as well, but im not to sure on wiring. So to the point i had to drill out the old cylinder and play with it cause it was jammed and could not set it to the ignition setting to pull the old one, during this process i noticed a cable came loose that connects to the cylinder housing and would move with the key when you go from power to start it, pulled it out by accident & then truck was locked in the park position after i put the cable back i was able to shift but noticed it shifting freely afterwards. Already put a new tumbler in but still can shift with no brake, even with the truck off. I can still pull that cable out and the truck will lock into park but when i put it back it shifts free again. I just took the truck in for an out of province inspection(canada), and that was not an issue at the time so im 95% sure i did something to cause this. but could also have not noticed it as its second nature to put your foot on the brake then shift. but doubt it as it was just inspected yesterday Any help is appreciated and i can also post pictures when i make it out to the shop. Thanks!! ( Just remembered as well, disconnected the battery prior to working on the tumbler. because i was checking horn wires under the airbag, as the horn does not work not sure if disconnecting&reconnecting the battery can affect shifting in anyway)
  8. So I am currently on vacation 300 miles from home. My truck is a 16 1500 Z71 and has about 33000 miles on it and all of the sudden driving on a flat surface grade braking will enable. The truck is also shifting randomly and violently. Sometimes when making turns in auto mode it will feel as though the 4wd system is engaged. Anyone else encounter these issues? Anyone might know what could wrong that I can fix real quick while I'm away?
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