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torque coverter solenoid stuck OFF code...

Discussion in 'Chevy Blazer Forum (GMC Jimmy)' started by johndavis377, Feb 15, 2014.

  1. johndavis377

    johndavis377 New Member

    Hi, I have an 03 blazer 4wd. I had a code come up for torque converter clutch solenoid stuck OFF, well as I drive It shifts into all 4 gears but then when I hit about 45 mph or so then I have to ease off the gas to get it to keep going, if I give it to much it will rev but not kick down to pass for example, if I go up a hill in fourth I have to ease off to get up the hill. I have a hard time getting it over 50 mph without it over revving... History of the truck... it has had all maintenance since new at the chevy dealer every time on time.... what could the problem be? The abs light has been on and off recently but I believe that's a separate issue, the 4wd engages as it should and it runs perfect through all the gears then at 4th gear It over revs.
  2. Scott_Anderson

    Scott_Anderson Member 2 Years 100 Posts

    Well what you are describing sounds correct, your TCC lockup solenoid is not operating. It could be as simple as your brake switch is stuck(pressing the brake pedal will disengage the lockup), but your brake lights would be visible also.
    How is your trans fluid level, color. How many miles.

    Here's an interesting read if you want to do some testing on your own.

    http://autorepair.about.com/cs/troubleshooting/a/aa061701a.htm

    As you read, you can see that there are many variables that can cause problems.
    Electrical signal to the solenoid is not preset,
    signal could be going to the solenoid, but the solenoid coil could be bad,
    the solenoid could be stuck physically,
    the transmission pump could be getting week and not building up enough pressure to engage the TCC lockup,
    there could be a fluid blockage internal that is blocking the control flow,

    etc.... you get the idea.
  3. johndavis377

    johndavis377 New Member

    The brake light is functioning properly, the truck has 245,000 on it. The fluid is clean and full. The trans was changed and flushed at around 100,000 then fluid and filter changed at about 200,000. Due to the amount of miles this truck was at the dealer once a month for oil changes and required maintenance every month since new, I know that doesn't mean things wont happen but just to give you an idea of how it is maintained. I cleared the codes by disconnecting the battery and now the check engine light has not been back on so I have no new codes... should I change the fluid and check the pan? I don't know which electrical connections to check under there.
  4. Scott_Anderson

    Scott_Anderson Member 2 Years 100 Posts

    You could try and find the wire harness that comes out of the transmission and follow it to the nearest plug connection and check it for dirt, corrosion, etc..

    I'm by no means a transmission specialist, but you may want to consider a visit to an independent trans repair shop for a proper diagnosis. I don't know how much "unit repair" options you would get from a general dealer as opposed to a specialist shop.

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