"Service enging soon" light stays on....

Hummer 4wd service light reset Questions & Answers - Fixya

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Hummer h2 2003 55000 mill ... service 4wd the liht is on all time Remote the battery wire from the car for 20 ... My 2006 H3 will not come out of 4 wheel drive?

In most cases the check engine light indicates a sensor is bad. Have a mechanic scann it and if so replace it.....hope this info helps and if so Please leave rating on this post and good luck..

If your airbag light is on then there is a problem with the system and you need to bring it to a shop to get it checked out. As for the service engine soon light, for chevys, that is the same as the check engine light, if you have a scanner to hook up to the port under your dash, if not you have to bring it in to the shop to get that checked out also,
hope this helps :)

MOST COMMON IS ENCODER MOTOR
COULD HAVE SWITCH OR WIRE ISSUE
OR INTERNAL T/CASE

May need an oil change and they would know how to turn it off

I just installed an Interstate Battery Group 3 from Costco on my Chevy Tracker 2.0L 4 cyl. 4WD.
It fits like a gloove, has 640CCA instead of 625CCA. Cost was U$74.90 + tax + U$15.00 core charge ( which they'll reimburse once you bring the old battery back.)
42 months warranty you can't beat it. It also had a very practical handle to drop the battery in. The only thing, the battery terminal are reversed, so you have to install the battery 180° to still have the positive (+) side on the right hand side, but it worked like a charm

take about 20 minutes if you have to tools handy. You have 4 02 sensors so be sure to have the tech tell you which one.

You should disconnect the battery cables, negative cable first then disconnect the positive cable from battery and wait ten minutes (this is a good time to clean the terminals and connectors at tis time). The check engine light should be reset and disappear if all is well.

Most major auto part chain stores have a loaner code scanner (they require you to leave your ID while you use the tool in their parking lot). There is a connector under the dash near on the drivers side that accepts the reader....check the codes and Google them for repair info or post them back here.

you have a trouble code stored. This means the pcm has detected a problem somewhere