Rear driver side van wall. Look for louvers in the finish.
Blower fan relay is stuck or fused contacts, replace it
15
Dex-cool (orange)
under dash on pasenger side
Place a drip pan beneath your 1999 Chevrolet Express oil pan. Remove the oil pan plug. Allow the old oil to drain out. Replace the oil pan plug to its original position. Put the new oil into the engine.
I believe that it is under the dash on the pasenger side up towards the fan motor
Wild guess: On most GM vehicles it's under the hood, on the firewall, on the passenger side.
the fuse block is on the driver side of the engine compartment at the rear,like inside the fender.
what is the firing order for a 1999 Chevrolet venture
If you are referring to the SBC 350 L31. 1996-2003 Chevy Express/GMC Savana full-size vans 1996-1999 Chevrolet/GMC C/K full-size trucks 1996-1999 Chevrolet Suburban/GMC Suburban full-size long-wheelbase SUVs 1996-1999 Chevrolet Tahoe/GMC Yukon (and 2000 Tahoe Limited) full-size short-wheelbase SUVs 1999-2000 Cadillac Escalade
Not sure about a 1999 but on a 2000 the blower relay is on circuit C-108 in the Junction Box.
Blower motor: remove the glove box and you will see the blower motor and blower resistor.