Question about 2002 Hummer H1
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Posted on Jan 02, 2017
With the vehicle on level ground and the engine on, check the transmission fluid level - you need to drive the vehicle a few minutes to warm up the fluid. If the fluid is low, add some fluid slowly and then recheck it. It's easy to get too much fluid in the transmission. Have you noticed any pink stains under the vehicle after moving it from a parking space? If the fluid level is okay, then a sensor could be to blame. If the fluid on the dipstick is dark and not bright pink, it probably needs to be changed. Check the service interval in the owner's manual for the mileage/age that the fluid needs to be changes.
Posted on Dec 27, 2008
SOURCE: Hummer H2 2003, shifting problem
Yea, hummers are notoriously unreliable. They are gas gusslers too.
I'm assuming this is an automatic?
When the transmissions computer detects any malfunctions, it will give you a check engine light, or something along those lines.
Do the normal checks such as checking the transmission fluid level as per the user manual.
For further diagnostics you'll need to take it to a mechanic. It's impossible to diagnose a problem like this without driving the car and being able to reproduce the problem.
Posted on Aug 09, 2009
sounds like a skip if the light flashes. your vehicle goes into a limp mode if it detects a problem to prevent further damage. this is why you cant go over a certain speed of rpm
Posted on Oct 03, 2009
youre going to need to take it to either a hummer dealer or a reputable and trusted transmission shop. these are general motors transmissions and do not cost a lot to rebuild. the only difference in price is whether on this year you have the 350cid gas or 6.5 na motor. wish i had better news but remember that transmission is constantly trying to move 8500lbs. service every 15- 20,000 miles. let me know if further assistance is necessary. i am certified with am general.
Posted on Dec 20, 2009
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