I have a 1997 Blazer 4.3L 4 WD Vin W

I just was looking thru the AcDelco Distributor Rotor Part Numbers.
There are 2 listed for a 1997 Blazer.

Part Number E528C
and
Part Number D465

I purchased the D465 and have had it in the vehicle
for the past 4 months. I just noticed that AcDelco
has it listed for a 2WD with no reference to a 4WD.
Can anybody tell me if the D465 is the correct rotor
for a 1997 4WD. And can anybody tell me what the
E528C model is for? I am wondering if I have the correct
Distributor Rotor in my vehicle.

Thanks Mark K

 

They both look to be the same part. There may have been a design change in the distributor which required a slight change to the rotor. This change to the rotor would have been made backwards compatible. For whatever reason, they seem to be stocking the old part as well.