DRL lights not working bulbs have been changed fuses are good

1996 Chevrolet K1500 Suburban Daytime Running Light Module ...

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ok, just the Highbeam cluster lamp
the cluster has fuses test them first?
DLR is canada, are you there,or car is? for canada market?
(unique wiring there) we are USA forum and cars, and wiring
ever see the free schematics, posted here 100s of time?
ZJ jeep is its name , as seen here, under wiring.
http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service

DRL , is a problem of many cars, it makes that which was very simple now complex. On many the wire pins like to melt on the DLR module. (looking first, is always a good idea , for obvious damage)

Chapter 8w covers all wring, best is to have the book or PDF on it.
DLR /Dimming module.
Page 8w-40 -9 clearly shows, the Cluster hi beam lamp
has 2 pins, is ground G100 , the runs many things there.
the turns cluster indicators, go dead with g100 busted.
pin 1 for the HI beam indicator goes to the DLR/dim module
so 8w-44-13 shows (and next pages) show it all
i invite you to look and read. it
first item of interest is fuse 24, powers this modules logic
8w-50-10 is head lamps with DRL, called front lighting, chapter.
says right there"canada only"
Fuse 19, is also needed.
to see that page above, and all of 8W50 (front, lites, canada)
you need Adobe Reader installed, to read PDF books.

my guess is fuse 24, did you check all fuses first.
if the DRL works, and id does run the highbeams BTW

if the cluster bulb is good
an no 12vdc to it, as you said ops you said DLR are dead
well sure.
the DLR must have all imputs good for the module to work
ill list them
hand brake switch working, is it?
brake failure lamp switch working? page 8w-40-7 see it?
the later switch is DRL only switch on MC.
put in a usa switch and dRL goes dead.
there is more, but ill stop
check all pins on the DRL modules of fall fuses are good
to see that all inputs are good
if they are, the Hi-beam indicater wire there goes to 12vdc.

Probably the bulb for the indicator. There is no I separate fuse.

drl unit short or bad ground check all fuses and find the drl unit or find the part if not integrated in the fuse box

If it is anything like my 04 GMC Sierra, there is a relay panel under the hood. In that underhood box where you found the fuses, there are also relays. They pop out (the diagram is on the lid of the box). After the GMC hit 200k, the relays started going out. The high beams are on a relay, the lowbeams are on a different one. You can pop one out and replace it with the horn or foglight relay if you want to check it out. I am betting that the DRL bulb just happened to go at the same time. Mine go out regularly..I would say around every 10-15k miles. I don't know if this helps, it is just something that I have run across with a similar vehicle.

High beams dont go on at all? Does the DRL light dissapear when u turn on the headlights? Now, because your high beams dont work, it more likely means that you need to replace your bulbs. Because if it would be a problem in the car itself, only the DRL system would fail. Im 80% sure that changing your bulbs will solve the problem.

CHECK DRL FUSE MAKE SURE ITS IN PLACE TIGHT.IF FUSE GOOD RELAY COULD BE GOING BAD.

Not saying that you don't know this but the daytime lights are turned off in park.
If that is not your problem, a friend of mine uses the amber bulbs, they last longer.

The problem with the DRL issue describd in the above posts is the DRl module(it needs to be replaced). The buzzing relay and intermittent on/off of passenger side DRl are indicators that the module needs to be replaced.

check fuses, check wiring.