Question about 2003 Saturn VUE

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2003 vue ECU problems

I will try to make the short. I have an 03 vue witch came factory with the v25e trany. I removed the cvt and put in a manul 5 speed, removed the engine/trany wiring harness. Installed a harness out of an 2005 MT vue. Starts runs, but I have no speedo, no cruse, and the cooling fans run all the time. The IP is lit up like a Christmas tree, check engine,service engine, and power down lights. I tried putting the ecu from the 05 MT vue it started ran 5 seconds the the theft system took over and would not let it breath again. So I put the cvt ecu back in, starts runs just with all the problems. Went to Saturn they tried to reprogram the ecu with no luck. I'm running out of ideas. Any help would be great Andy

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Make sure all grounds are connected. usually it is something easy or stupid.it should work.an obd-II scan may help pinpoint the problem.

Posted on Feb 19, 2009

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My 03 saturn vue starts but does not go forward or reverse


Is this the 4 cylinder or the 6 cylinder model? The 4 cylinder has a notoriously troublesome Continuously Variable Transmission (CVT). These mischievous little skamps like to cause mischief at just the wrong times, such as when you are on your way to work on Monday morning, or when you are in the path of a train.

Since you have no engagement into forward or reverse the drive belt has likely failed you. Replace the case half and filter, and all of your dreams will be realized.... probably..

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WHAT IS THE TRANSMISSION FLUID FOR CVT 2.2 L FWD


it's very special, and if done wrong, dooms the trans-axle
all this is covered, in the FSM
read it in the book and on most cars the CVT has very very
special needs and procedures for changing lube.
some, it must be done a s special temperature. < yes.

ever seen and FSM. (for doing factory service)
it shows all the steps, 1 by 1.
login to alldata.com
the lube is at GM. dealers.
03 VUE
VT25e (cvt made in Hungary)
GM RPM code M75(2WD)/M16(F4WD)
spec, fluid
DEX-CVT and Automatic Transmission Additive
8.53qt
there are 10 service bulletins on this trans-axle
TSBs (read them all)
see the special additive yet>?
quote.
Notice:
Use DEX CVT fluid (P/N 22688912) only. Use of
any fluid other than DEX CVT will
cause internal trans=axle damage.
Important:
Add one unit (10 CC syringe) of DEX CVT additive (P/N 22697447) whenever an unrecoverable loss of fluid occurs during an authorized limited on vehicle repair. Minor fluid
loss, such as minor drips that may occur during the fluid checking procedure, does not require the addition of the additive.
end quote.

here is the actual instructions for replacing VT25e filter and fluid (special)
next

Jun 11, 2014 | 2003 Saturn VUE

1 Answer

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