Durango AWD While selector is on AWD, AWD light blinks & 4LO light is green Does that mean vehicle is on all wheel drive or 4LO? How to put it back on AWD?

2003 Trailblaze LS 4WD problems ,but what 4wd option was installed new, the VIN + RPO list tell tells that
what are you tires touching, ICE, dirt or snow or hard pavement.????????????
first time you using 4wd or only this truck first time ever, no history told
the RPO code is NP8 for some version of this car the VIN code will tell you RPO list. and what box is here.


246 is yes FULL TIME and 6 and end means computer control wet clutch in the box.
they used 5 different transfer cases that model. care. so says GM parts oem online

avoid 4Low until you learn its limits,and avoid any selection called lock center differential tires on pavement

Not all cherokees were fitted with a 2 wheel drive option. You should have two shift sticks in the centre console. Your normal Park, Reverse and Drive selector and a smaller, shorter stick to the left of it.
This shorter stick will show you your drive options.
If you only have the first three listed yours is permanently 4 wheel drive, sometimes called AWD, (All Wheel Drive).
Starting furthest away from the engine, they should read as...
4Lo - Low ratio 4 wheel drive used just for 'off road' driving.
N - Neutral. This disconnects ALL drive to ALL the wheels.
4 FULL TIME - High Ratio 4 wheel drive. Normal road 4
wheel drive.
"Options that might not be fitted".
4 PART TIME - Automatically switches from 2 wheel drive
to 4 wheel drive if the rear wheels start to lose grip.
2WD - Dedicated 2 wheel drive only. Power is sent to the
rear wheels.

On that vehicle the wheel sensors control the four wheel drive with is nothing but traction control if the sensor are bad it can lock in and not come out the transfer Case has a solenoid on it also the toggles it it also can be stuck I would start bye checking relays first and move from there hope this helps

Shut the vehicle off, Put gear selector ( PRND321) into neutral, roll the vehicle ( Move) while moving try to put the 4x4 selector into desired position, If problem still persists feel free to e-mail me directly at [email protected]

Possibly you have a bad TCCM or transer case control module. If you are still under the 7/70 powertrain warranty, they will replace the TCCM for $100.

there are 2 systems.
one is a part time system only.the 4x4 locks and is for ice mud and snow.Driving full time will damage the transfer case.The other system is a full time system and the selector says 2wd,4wd part time ,4wd full time and 4 lo. if in full time,it can be driven all the time even on dry roads.The full time is really an all wheel drive system.
the 4low is a very low gear and the main shifter has to be put in neutral and then the transfer case put in 4 low.attempting to put it in 4 low while in "drive" will make a gear grinding noise.
getting out of 4 low is the opposite.shifter to neutral and then put it in 2wd and then in drive.The newer durango has an electronic transfer case with a dial on the dash.The 2002 was available with 2wd,4wd,awd and 4 lo on a switch.The 1999 has the lever on the floor .

Awd is on demand 4wd, better fuel economy
4wd high is locked in high range
4wd low is lock in low range

come to a complete stop put vehicle in neutral than shift from awd to 4lo also do the same when going back from 4lo to awd

You should have it put on diagnostic scanner to tell for sure. system needs to be tested. As a mechanic myself, I know these can be done fairlty easy on most vehicles but some can be slightly tricky