for me, its the high beams, but on a lower voltage.

i tried checking wikipedia to see what i could see, but it was as usefull as wikipedia...

 

I believe it's the same for all 98+ Blazers except the ZR2. I think those use the low beams as the DRLs.

 

My 97 uses the high beams.

 

All 96+ s-series trucks with composite headlights use the high beam bulbs wired in parallel (negative from one ties into the positive for the other) except for the ZR2 which uses full brightness low beams.

 

i think we just found out who to cheat off of during test time.