How many fuse panels are there on a 04 trailblazer ext

Perhaps both bulbs have failed - it has happened many times before.
Perhaps a failed relay, headlamp switch, dipswitch, connections or wiring.

By 04 the switching operations in many vehicles was being done by digital electronics (in the name of progress). This amounts to local black boxes taking instruction from the dashboard switches or other black boxes.

The circuits are different from the traditional ones and so, when chasing a fault it is important to study the wiring diagram first.

u need da fuse u put on cars.

thanks,
DING

Possible that the fluid pump in the transmission is going bad.
Best bet is to take it to a reputable transmission shop and have it diagnosed.

I’m happy to help further over the phone at https://www.6ya.com/expert/jason_00b31cc8f593773a

First check fuse #10 in the rear fuse panel, if fuse is OK, the Driver's Door Module (DDM) is probably bad due to water intrusion. You could try swapping in the module form the passenger side to verify.

This vehicle is a chevy trail blazer , doesn't matter yours is in the same place an the samething .
Chevy Trailblazer EXT Blower Motor Won Turn Off

When the lights go out on you. Switch relay # 45 with #46 in the fuse box. If your lights go back on, then try cleaning the contacts on the relay and the fuse box. If this works, you're good to go. I keep a new one in the glovebox just in case though.

The OBDII connector receives its power from the AUX PWR 2 fuse (#15) located in the fuse panel under the rear seat. This fuse also controls the accessory power plugs on the dash.

Head light switch is faulty

CV-joint (axle) but most likely the wheel bearing like mentioned. When you turn right the weight shifts to the left taking the load off the right passenger side bearing.

Check for broken/dmaged wire(s) in loom that goes from post to door in hinge area.