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Found 3 results

  1. My 09 silverado 5.3 4x4 has shifted hard into 2nd and some into 3rd for several years now. A few months ago I decided to fix it. Codes were for transmission control solenoids, module, oil pressure sensor, misfires...etc. codes like P0700 P0717 P0521 P0523. I replaced all 3 shift solenoids, oil pressure sensor, and immediately the truck shifted like new again and it lasted for a few days or a week. And it started shifting hard again. Really hard. It's so frustrating. And it's throwing all the same codes again. Recently, my truck started misfiring so badly the entire truck was shaking. It was running on two cylinders. All of the ignition colis were failing all at once and the truck was not drivable. Btw, I just changed out those ignition coils, plugs and wires just two years ago, all Ac Delco plugs/wires and duralast ignition coils. So anyways, I replaced all of the coils plugs and wires again this week and the engine no longer misfires, running on all cylinders again. And for a few hours after, there was zero hard shifting now. It was running great, like new again. Shifting smooth as could be. But after making it into the city and hitting traffic lights and stop signs, it didn't take long for the very hard shifts to come back. I've read on this and have been dealing with this in time and parts for so long now. I've read about ground wires could be the cause of all of this. I have replaced everything the computer has suggested, and for a short time after the repairs, the truck would run like new. But the hard shift always comes back. I know there's people out there that have had this same problem. I've read a lot about it but without actually finding the grounds for these specific sensors, I've hit a dead end. The issue just keeps coming back as it's obvious there is a root cause I am not getting to. Please share any knowledge or experiences on this topic. And any knowledge of the location of these grounds may be at. Thank you!
  2. All: A couple weeks ago I had a code thrown that indicated an oil pressure sensor fault. My mechanic in analyzing the code noticed that my oil was burnt and filthy having been changed only a few hundred kilometres previous. He thought that maybe the oil change place put the wrong viscosity oil in and with the recent cold weather caused the fault and poor oil movement thus the burn and the sensor fault. We reset the code, change the oil to Mobil 1 0W-20 and off I went. Less than a week later and the check engine light is back on with I assume the same oil pressure sensor code attached to it. Has anyone else seen anything like this? Thanks in advance. 2014 GMC Sierra 1500 128,000 km m
  3. Hello everyone, i'm asking for advice & help you guys. I know it's not a good way to start with asking help, I'm sorry bout this. Let me shortly introduce myself - my name is Alex, I live in Russian Federation, Moscow and I drive 2006 Chevy Tahoe (gmt 800) with 5.3 Vortec engine (simple gas, no flex fuel). I am facing a problem with my oil pressure gauge - while driving or at idle oil pressure gauge jumping from 0 to max value. It may stuck at 0 for long time (hour or so) or can stuck at max value also. When I switch ignition on gauge does NOT jump to max, everything seems to be ok for at engine start but soon gauge become messy. As a pressure falls to 0 I have an alarm warning with horn and alarm in message centre. When this happenes, gauge jumps to max and when falls down again sometimes. I'd like to mention that there are not any strange sounds with engine (no knocking or something) when pressure falls down. Since I did not find a particular my problem at different forums, I decided to ask you guys. Also it's a bit difficult to maintain and service such vehicle here in Russia, so I would really appreciate for any advice of community. I recorded some videos with mess going on with my vehicle and uploaded them to YouTube so I can share them with you. https://www.youtube.com/watch?v=RbPpOAKi2D8 https://www.youtube.com/watch?v=Lbm4Gn3YYzI I found in rockauto store this new acdelco oil pressure sensor ACDELCO 12677836 - is this correct partnumber for me? Any advice and help truly appreciatable. P.S.: thats my second GM truck, the previous one was Tahoe 1996 5 doors 5.7 Vortec engine
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