Poor GM engineering is the real reason that the light comes on. But seriously you need to have a dealer or service tech hook up the truck and get the code to determine why the light is coming on. Remember that this is a sealed transmission, GM decided to engineer it to never be serviced. So most repairs will need to be done by the dealer or a transmission shop. And don't let them scam you about changing the Transmission oil, like I said, it's a sealed transmission, they can't change out the filter and oil on it.
The check trans light may light up in an Isuzu Rodeo, because there are problems with the transmission, The light will show up on the cars dashboard.
My check engine light has been on for one month but last night my check trans light flashed off and on about 3miles till I was home. Why and what do I need to do? I have a 2000 Isuzu rodeo.
My Trooper did the same thing and I replaced the fluid and filter and added a separate trans fluid cooler and that fixed the problem.
I do believe that if it's a sealed transmission then you have to pull the check plug from the trans to check it its just like a fill plug believe its on the left side of trans.
TCM= Transmission control module.
there is 2 plugs on the bottom pan of the trans. With the engine running pull the plug that is higher up. Fluid should just trickle out.
This is a very good answer below but it does NOT apply to a 1999 Isuzu Rodeo. The Rodeo's transmission is sealed, you cannot check fluid levels at home, you must take the vehicle to an authorized Isuzu mechanic so they can check the tranny fluid for you. Transmission: Keep an eye on your oil level, as it can get low on you real quick, especially on long hi speed highway trips. There are ways to remedy this. If equipped with an AT, your rodeo has a 4L30E GM trans. You should change the ATF. BMac- for the ATF leak thing, check the accumulator piston cover on the pass side of the trans. VERY common on the 4L30E. Leaks? How about the accumulator cover? It's on the right side and it's round. Check this: Accumulator repair: before trying to remove the snap ring you need to push the accumulator cover in then remove the cover don
the o2 sensors are located on the exhaust pipe one by trans and one by the muffler there is 2 of them
Starter is on passenger side of motor underneath intake bolted to trans bellhousing.
check your tranny fluid first
Could be in the trany sensor/gear or the speedo itself
There is no dipstick for the trans.