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Lagging trans downshift


jacob9
08-12-2012, 03:46 PM
After braking down to 15 or 20 mph my 2004 Trailblazer transmission has a slight hesitation and clunks when I start to give it the gas. Could this be
due to a sticking modulator or some other issue?
maxwedge
08-12-2012, 08:04 PM
Welcome to AF, no modulator it is pcm controlled. The clunk could be anything needs to be checked on site. The downshift issue again can be a difficult diagnosis, engine load/speed, throttle position, state of tune are all in the mix when it comes to trans shift issues. Full scan for pending codes and sensor inputs is the first step.

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