First thought is was front seal closer inspection find the line was cracked
Temporary fix is to cut out bad section of line and use "oil cooler" type hose to make a splice using hose clamps.
SOURCE: GMC automatic transmission
I'm told and read a sun shell may be broke. Common problem for this vehicle. Shop will possibly rebuild and use aftermarket kit parts to correct problems the transmission had originally. Cost is probably between $1300 to 1600 to repair. Good luck I got the same problem on a 97 Jimmy and 3 shops said the same thing.
SOURCE: how do i change the transmission fluid out of my
There are two ways to changing the transmission oil. If your going to change the transmission oil and filter, your going to have to drop the transmission oil pan to get to the filter and the oil will drain from there, but keep in mind that it will get messy. The other way to replace the transmission oil if that is all your going to do is to get a large bucket and a small hose the size of the transmission oil line. You can disconnect the transmission oil line from the radiator on the passenger side and connect the hose to the line and the other end to the bucket. Start the truck and try to do this with two people, one to hold the hose and one to start the turn off the engine when the transmission is almost out of fluid. DO NOT RUN THE TRANSMISSION DRY, so make sure the other person understands you when you tell them to shut off the engine. This will ensure that you replace most of the fluid in the transmission, once most of the oil fluid has been drained from the transmission, just reconnect the oil line and refill the transmission fluid through the oil dip stick. Good luck and hope this helps.
Automatic Transmission, 4L60-E Initial Fill..........4.7 liters
Automatic Transmission, Total Fill 4 speed 4L60-E..........10.6 liters
Testimonial: "thanks "
SOURCE: How do you change a 2000 gmc jimmy blower motor?
How do you know the motor is bad ? Have you run 12 volts to it directly ?
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SOURCE: change fluid on 2005 GMC Jimmy and now revving
did you change the filter too? If so is the new filter EXACTLY like the old one? Are you sure the trans is full of fluid? Sounds like a wrong filter or low fluid. Also is there a dent in the trans pan that could be hindering the fluid flow into the filter? If this is the case replace the pan.
Testimonial: "thanks for your help, the filter is the correct one and the fluid is ok and no dents in pan"
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