Asked by Jun 10, 2016 at 10:20 AM about the 2004 Chevrolet TrailBlazer EXT LT 4WD SUV

Question type: Maintenance & Repair

Hi I've been having this issue for a while
and I'm looking for answers before I end
up giving the truck to a junk yard. Before
it was cranking up but it wouldn't really
move when I put in drive. It's also leaking
this milky color which means water is in it
right? Now it doesn't crank at all without a
jump so could that be the alternator?

5 Answers


So when it did run the transmission won't go into gear, the engine oil is a milky color and now it won't crank over unless jumped. So it probable needs a tranny overhaul, the engine will have to a least have heads removed to find out what has happened there, and the start/charging system needs to be tested. I would say that the repairs that it is going to need exceed the value of the the vehicle. You might want to think about finding a rich like yours that was totalled but has a good running gear and put that running gear in your rig, it would be a lot cheaper and you could still keep it.

1 out of 1 people think this is helpful.

The transmission fluid color is milky not the engine oil


And when I give it a jump and put it in drive it doesn't move.

Tom Demyan

Transmission fluid that looks like a pink milkshake means the transmission cooler has failed and coolant has entered the transmission. Your coolant will also be the same color. If you catch this in time, you can flush the coolant passages, replace the radiator and transmission and be on your way. Seems you let it go too long and the coolant/water in the transmission destroyed the clutches. So new trans and radiator required like tennisshoes mentioned. Not starting without a jumpstart usually means a weak battery, what is the voltage? Should be 12.3 or higher.


OK got it, the battery needs to be recharged then tested, if it fails replace it then the alternator output should be checked, no lower than 13.2 and no higher than 14.8 volts. As far as the tranny Tom's right about flushing it, you might be able too save it, cut the cooler lines and plug them off in the radiator then install a separate aftermarket trans cooler, then if you do have to rebuild or replace the tranny that will already be done and you won't have to replace the radiator.

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