How and where do I find a Power-Train control module on a 2004 Chevy Trail-Blazer

Yes, as long as you're using the same short wheel base OR extended wheel base.

Please specify the actual problem.

yes

Hello Linda! Replacing the HDM relay for the low beams will not trigger any of these problems. If the blower isn't working, you probably need to get a new blower motor resistor (for manual controls) or blower motor module (looks the same) for automatic climate control. To access, need to remove the plastic kick panel near your feet on passenger side. After removed, look up you'll see the resistor, it's about 4" long with 2 small screws in it. You'll also need to drop the glovebox door to remove the connector from the resistor to the motor. Suggestion- buy a pig tail for the resistor also, these tend to melt. Very common problem. The ABS dash could be a bad wheel hub assembly or a hub starting to go bad.

if the light doesnt come on the compressor is not engaging the clutch. possible wiring problem. check a/c clutch relay. may be faulty compressor or the system may be completely empty of refrigerant

Check fuse #10 in the rear fuse panel. If fuse OK, try switching passenger side control module into driver's side. Also check for broken wires in wiring harness that goes between body and driver's door.

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

replace the relay for this motor if you are talking about the heater blower. The contacts in the relay have fused together.

Typically it is a 255/65R/17 or 255/70R/17

On 05+ Trail Blazer, the fuel filter is integral with the fuel pump inside of the fuel tank. It is a non-serviceable part. On 02-04s, the filter is on the drivers side frame rail at about the B-pillar. If your trail Blazer is a late 04 which means that it was build close to the 05 Trail Blazer, you may have a non serviceable fuel filter. Good luck and check under your Trail Blazer or look at your manufactured date sticker on the door which would help you indicate if your 04 is a early Trail Blazer and you'll have the fuel filter on the inside frame rail under the driver's door.