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Also sold under the GMC Sierra and VIA Vtrux names, available in the US, Canada, Mexico and other countries around the world.

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Why does my RPMs jump up and down on my truck when I accelerate hard

2003 Chevy Silverado 4.3 v6

When I push down hard on the gas my truck acts like it's either getting to much air or Lossing air an my RPMs start jumping up an down anyone ever have this problem an know the fix????? I've been trying to figure it out for a little over a year now an i replaced some sensors an plugs

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I have a 2010 chevy silverado with 6L80 transmission .I noticed two days ago while driving my RPM gauge is jumping a little while going 60 to 65.Its like cutting out slipping or misfiring, no engine light is coming on has 150k miles took it to AAMCO transmission they did a diagnostic check it passed test .Any suggestions would be appreciated.


Here is a video of what was going on with my truck I changed out my crank shaft position sensor and it quit bogging I hope this helps with yours.


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Jason Mackey, did you ever figure out your problem? I’m having the same issues. Mine is a 2011 with 146k on it. Thanks


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@chris2454l ,Chris, Engine sounds like it has a misfire issue, Bad plugs, clogged air filter, bad sensors/O2, failing knock senor, faulty injectors, dirty throttle body, EGR valve, vacuum leak, partial plugged fuel filter, failing fuel pump, coil pack failing, clogged catalytic converter, loss of compression(sticking valve, blown gasket)etc.etc.. As a first step have the car scanned for trouble codes as it may identify the exact problem. Some of the auto parts suppliers offer free code reading like Pepboys, Nappa, Advanced auto parts,etc and some of the guys are very knowledgeable and may have seen the issue often and put you on the right track. This may still not pick up the fault, as a good scanner showing live data(gives actual readings and shows sensors,etc operation) may have to be used from a good local shop. See below a couple links that may help in diagnosing. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.

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