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The small black (either rubber or plastic) hose attached to your cars blower motor is a cooling tube for the blower motor.
There is, as far as I am concerned, anyway, only one blower co. GMC. The 471, 571, and 671. The rest are pretty much just for show.
The 351M, is "modified." Windsor motor, with Cleveleand heads. So, I guessd a small block.
Yes.
You will find the blower motor under the hood, on the firewall, passenger side, close to fender. To remove the blower motor, unplug the electrical connection at the blower motor, disconnect rubber cooling tube, remove the 5 small screws holding it in place, then wiggle the blower motor out and reverse procedure to install.U alsohave to remove the black box on top of the washer bottle.
ON THE 1993, THAT BLOWER MOTOR RESISTER BLOCK IS LOCATED LOW ON THE BLOWER-MOTOR/HEATER CORE SHROUD (OUT ON THE FIREWALL) JUST TO THE RIGHT OF THE HEATER CORE AND JUST BENEATH A PAIR OF HEATER HOSES THAT GO THRU THE FIREWALL. IT JUST MIGHT ALSO BE LOCATED THERE ON THE 2002.On the '02, it's located inside under the dash, behind a small panel, below the glove box.
the big block will bolt right to the small block motor mounts but they do make big block motor mounts that you can buy and install on the 66, it lets the engine sit a little lower and further to the drivers side.
On the passenger side under the dash is the blower motor held in with 3 small screws. First unplug the wire harness to the blower and remove the 3 screws. Installation is in the reverse order
Under the hood, on the passenger side of the firewall, close to the blower motor. It has an electrical connection you can unplug and is attached with two small screws.
Its to the left of the blower motor under the dash on the passengers side and it should be held in place by a small screw and or its just a pull out type.....
The Blower Motor in under the dash area ubder the glovebox. You will need to remove the plastic cover to get to it. It has 3 small screws holding it in place
motor #3978010