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2004 chevy trailblazer_lt_ext
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Discussion Starter #1
Cruise Control engaged at 45 mph Flat straight roadway.
Tachometer fluctuating between 1200 and 1500 with engine responding with tach movement.
And no codes!!
WTF???
 

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2002 chevy trailblazer_lt
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174 Posts
Although the speed is different this sounds like trouble with the Torque Converter Clutch lock-up system.
 

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I have the same problem as you. I read somewhere someone had the same problem. It was their vvt seloniod. I habe one on the way now shoild be here today. I will update you later tonight if that was the problem or not. Really interested if that is the problem. Been fighting this for a few months now.

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2004 chevy trailblazer_lt_ext
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Discussion Starter #4
Just put one in. Didn't change the rpm fluctuation.
 

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I think im going to change the transmission oil filter next. I did get a code for about a day a few months back that was for transmission component failure. But went away the next day.


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