Problem Code P0753

I moved this out of my old 4x4 post because I think they are unrelated. Any help on this new issue would be appricated. I just had my '99 Blazer 4.3 scanned at AutoZone because now the 'Service 4x4' light
isn't on, but the 'Service Engine Soon' light is now on. The code was 'DTC P0753; Shift Solenoid A; Circuit Electrical'. What the heck it this?
Thks, John
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I believe this is a trans code. you will need further diagnostics, better at a properly equipped trans shop or dealer, there are some tsb's related to the shift solenoids in that trans.

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Shep wrote:

bottom of the transmission valve body, A and B. One of mine had went bad and I didn't have 1st and OD. The Solonoid is about a $20 part and you will need to drop the pan so you will need a pan gasket and fliud (might as well get a filter and change it too). The solonoids are the same and on the rear of the valve body and the A one is nearest the drivers side. You either have a bad one or a broken wire leading to it.
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Broken wires are pretty common as sloppy mechanics will get them caught between the pan and case when changing the filer.
Doc

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. . ========On Dec 30, 2004, 6:15am snipped-for-privacy@gmail.com wrote: . I moved this out of my old 4x4 post because I think they are unrelated. Any help on this new issue would be appricated. I just had my '99 Blazer 4.3 scanned at AutoZone because now the 'Service 4x4' light isn't on, but the 'Service Engine Soon' light is now on. The code was 'DTC P0753; Shift Solenoid A; Circuit Electrical'. . . What the heck it this? . Thks, John ==============It's a code telling you that the computer has detected electrical values that are outside the acceptable data parameters for a known good working shift solenoid, as determined by the vehical manufacturer.
do this..........
go to the fridge.......
get yerself out one of them Buddy'sWiser beers...
go on over to that drawer by the kitchen stove and get that dollar store pair of pliers.......
go out to the truck........
unhook the battery negative cable, open the beer, drink it......hook the battery cable back up.....
and quit worrying about the whole damn thing!
cuz......
you didn't say one werd in yer post about the tranny not shifting....and if THAT code was set,
IT WOULDN'T SHIFT!!!!!!!!
so jest clear it, drive it, and don't worry about it.
unlessssss......
you got sumtin yer want'n to add to yer post, that may help with a more pin-point and precise repair technique to address symptoms other than jest the service eng. light is on cuz of that one code.
something like.......
it don't shift ??
oh.........
it does.
well.....then jest have a beer and unhook the battery and call me in the morning.
~:~ MarshMonster ~failsafe~
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Well I crossed my fingers and hope Marsh's recommendation of just clearing the codes would do the trick. However, the code keeps coming back. Which is confusing to me because it is still shifting fine. So I guess I'm going to drop the transmission pan this weekend (Why do problems only happen in the winter?) to check things out and maybe change the solonoid and filter at the same time. I am wary though because dropping the pan on my '88 and '89 Blazers were a complete frustation due to lack of space from the transmission mount and the exhaust header crowding. Has the space improved on the newer body style? Any tips from anyone? Will it ever stop raining in Ohio? Thanks, John '99 Blazer 4x4, 4.3L
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Well Eugene was right. I replaced the solenoid A and it solved the problem. About a $29 part from the dealer. I'm embrassed to say I didn't even realize 1st gear was missing until I drove it after the repair and I noticed the shift point. Whoops. Thanks for everyone's help. I saved a ton of money I'm sure.
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