Question about 1997 Chevrolet C2500

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I have a 1997 Chevy C2500 pickup. When it's cold out (I mean cold for Las Vegas, NV like around 38-50 degrees), the auto transmission will quickly "****" to shift into each gear. However, if you were to stop somewhere and shut it off for a minute or so, it runs fine afterwards. It will also at times suddenly down shift when on the freeway. The transmission has been rebuilt and I'm sure it's electrical. It also has a new brain. I've been told by a local transmission guy that he believes it is the ignition switch. Could that be it? If not, what could it be? Thank you.

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  • Chevrolet Master
  • 11,089 Answers

Rather then guessing it's the ignition switch , before replacing it and finding out that it isn't the problem ,you need to get creative doing some diagnostic testing . Or find someone who knows how to . Hooking up diagnostic equipment , professional scan tool , lab scop . looking at power an grounds , transmission electronic control module input's an outputs .
ECT Transmission Sensor ECU Signal Circuit
I really don't think the ignition swith is the problem . Other parts of the vehicle would also be affected , engine , lights etc.... There are complex electronic's involved .

Posted on Apr 23, 2017

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6ya6ya
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Posted on Jan 02, 2017

shaggyrat
  • 1224 Answers

SOURCE: 2003 chevy silverado will not shift into drive or overdrive.

transmission shift solenoid is stuck open this is a common vehicle issue in automatics and not particular to any make or model vehicle 15 dollar part and arm and leg for labor if taken in

heres an idea to try
take out the transmission filter and replace with new one make sure to take not of any metal debry in trans pan this indicates the trans had sheered its gears down and a trans rebuild is needed
the transfilter needs to be changed at a certain milage interval they can get clogged up
there is a kit you buy for your truck at any parts store
its an easy change hour of time unbolt trans pan unbolt trans filter and put new one in
kit comes with new seals less than an hour you can do it yourself

to overdrive you would feel a difference in shift badley if it was that something to keep in mind

Posted on Dec 06, 2008

SOURCE: Automatic Transmission shifts late and rough after warm

If it has over 60000 miles it may need a transmission service, which includes a filter and fluid change, fluid may look fine but if filter is clogged and not picking up fluid fast enough when u give it gas the pump spins faster and forces fluid thru to shift, more fluid is needed to shift into higher gear.than to drive

Posted on Jan 06, 2009

  • 37 Answers

SOURCE: Automatic Transmission shifts late and rough after warm

AS YOUR CAR IS VERY OLD. THE ENGINE PARTS MUST BE VERY OLD. IN THIS SITUATION EVERY CAR DOSENT WORKS PROPER WHEN THE ENGINE BECOMES HOT. YOU JUST NEED TO CHECK AT CHEVY SERVICE CENTER FOR A BETTER SOLUTION. THEY WILL HELP U BETTER AFTER CHECKING YOUR CAR PERSONALLY.

PLS. RATE MY SOLUTION.

NICE DAY

KETAN

Posted on Feb 12, 2009

  • 120 Answers

SOURCE: Chevy transmission won't shift into 3rd

front clutches bad needs to be rebuilt

Posted on Feb 13, 2009

Atyourdoor
  • 93 Answers

SOURCE: My ignition switch suddenly won't turn off, and

Hello. Its a common prob actually with all gm , ford cars and trucks. The ignition has whats called a " sidebar". This sticks up and causes this , or gets stuck on, or key wont come out ,or all the above. You will need a new ignition. Checker or autozone has them around 17 bucks..Quinn Arizona

Posted on Jul 25, 2009

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