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Hi there, having a bit of a sporadic issue with my Silverado, here is the best description I can give, I have not been able to find out what would be causing this, so any info on what you would call it would be great.
Occasionally the truck won't accelerate, or shift into a higher gear, and instead gets stuck at a certain speed. It has twice gotten stuck not going faster than 65 MPH, it accelerates TO 65, however does not get over it, and at 65 it is clearly at a high RPM and should be shifting up. If I drop it down to 30 or 40, and then floor it, there is also no acceleration kick like there normally is, it instead accelerates very slowly to 65, and then caps at 65.
I've had this happen twice in about the past 30 days and worried it might get worse. In the two times it has happened, pulling over, putting it into park, off, on, and then back into drive has resolved it.
Transmission fluid is kept up, clean, and at proper levels. Oil is clean, at proper levels.
Any help on simply identifying the issue would be great, thank you!
Let me know if you need any more descriptions or info about the vehicle, I'll be checking the thread regularly.
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The problem isn't with the transmission, I can just about promise you that. These things have so many safteys built into them that it is almost impossible to tear 'em up. The computer is protecting the transmission.
The fact that it will "reset" and operate okay with an ignition cycle proves that.
If your diesel fuel/air filters are good, then get this guy to a dealer or competent repair man, as you are dealing with a drivability issue.