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Drives

Found 5 results

  1. I recently bought a used 2016 Sierra Denali 5.3L 4x4 in March with 48k miles. Truck has been great until yesterday (now 52k miles) when I ease into the gas it shudders and shakes like crazy until i punch it. The tach is bouncing up and down and it doesn't matter if it's in v8 or v4. It almost feels like it's a misfire but it's weird that it only does it when I'm easing into the throttle or going uphill. The truck has the 8 speed transmission. Has anyone else ran into something like this and would the manufacturer warranty cover the fix for this?
  2. Truck Does Not Run Right...Tachometer Bounces...Hesitation from the start...Going up hills is Jumpy...Skips and Bucks, Feels like truck is Misfiring...Transmission shifts are consistently Rough and Random... Dealership confirmed the problem after test driving and they then found TSB #PIP5457C: Surge hesitation Chuggle Misfire Feeling With A Light Tip In - (Feb 10, 2017) which they believe match's the problem. The Dealership says GMC is aware of this (TSB #PIP5457C) the cause is unknown at this time. Do Not Know How Long It Could Take To Get A Fix. I called GMC customer assistance and requested a replacement or buyback they opened up a case number for me. They next day GMC customer assistance denied any kind of replacement, trade assistance, or buy back. Closed my case because they do not know what the cause is at this time and do not have a fix for the problem. I was told I must drive the truck (AS IS) until such time a fix is available. They also encouraged me to exercise the Lemon Laws in my state if I wished to pursue a replacement or a buy back. Extremely unhappy with my first GMC Truck and that's a shame because it’s a beautiful truck It just happens to be a Lemon that runs like Crap... Just keep driving (AS IS) is not what I paid for...I hope someone else has any insight to how to fix this problem. I hope others will post there concerns as well so we can get these trucks fixed or replaced...
  3. Hello all, This is my first post on this forum. Last year I bought a 2009 Chevy Silverado 1500 Ext cab LT with a 5.3l V8 that is Flexfuel capable. Well, I never intended to use flex fuel, but last week, I did so on the spur of the moment. We drove about 3/4 of the tank gone. Then as I was pulling up to the gas station to refill before going out of town for work, my truck's idle began dropping and feeling like it is about to stall out at idle. This happens whether park is engaged or not. I filled up, put some seafoam in my tank and drove about 1.5 hours to work. It continued to idle like this all throughout the trip and even later when I went out and sat at idle while on my break. What could be the problem? I can't imagine that an engine that is meant for flex fuel could get that messed up by it. A side note: we had the transmission rebuilt in January, just in case that makes a different. It has only been a few weeks since last oil change. All fluids were checked and filled up at that time and have been checked a couple of times since.
  4. 2015 Silverado Regular cab with 4.3 V6. Has just under 14,000 miles. The other day after work I drove to the store and was gone for about 15 min. I kept my phone plugged into the charger. Came out, started the truck and it acted like it was gasping for fuel. Almost like starting up an old lawn mower. It then started surging a few times until I hit the gas and gave it some real juice. Then it became normal. This has only happened one time but it scared me. The only thing different I've been doing lately is running E85 fuel. On my 3rd tank of E85. Temperature has been in the high 50s to mid 60s. So not sure. Any input? Was just inspected and had synthetic oil change two weeks ago.
  5. Hi all, Pseduo newbie here. Not new to mechanics or even GM trucks, just new to the GMT900 platform. Hoping you guys could help me out. I've searched google and this forum looking for answers, but have not been able to find anything similar to what I'm experiencing. Please forgive me if I missed an obvious thread. I'm not entirely sure what I need to be searching for. Was hoping you guys could steer me. We bought a low miles (71K) 2009 Silverado from a dealer recently, and it started having transmission issues within 1,000 miles. It came with a dealer-provided lifetime power-train warranty, but so far, the experience with the dealer defines the very essence of poor experience. They basically drive it a couple miles, not even far enough to get it warmed up, and then spit out the trusty old "could not replicate". So, I'm looking for a direction to point them, or maybe even a TSB? 2009 Silverado 1500 CCSB Z71, LC9/6L80E. Factory tow package. What is happening is this: When the transmission has warmed up, and you're going generally over 50mph, but sometimes slower, when coming to a stop the truck will surge and try to pull for a brief moment. And sometimes it will do this 2-3 times in rapid succession. It isn't really that the engine is surging, it feels more like the torque converter is locking/ unlocking rapidly. But, it will pull, even with you off the gas, and holding the brake. And if you watch the tachometer, it seems to synchronize with the downshifts the transmission makes as you're slowing. In a few cases, it has taken up all the drivetrain slack pretty suddenly and led to some fairly audible clunking/jerking. I should note, this transmission also has the very hard 2-3 shift, but, again, the dealer "can no replicate", at least not on their dime. Now, I saw some reference on a Pontiac forum, under the 6l80E in the G8, reference a software update released for 2009 trucks, but could not find anything about it anywhere else. I asked the dealer to check for software updates, but was told there was none. Has anyone had a similar experience with the TC locking/unlocking? Thanks in advance.
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