Allowners Of Suburbans With Rear Or Dual A/c

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Any suburban owners that have rear or dual a/c I am looking for some info from you. on your rear a/c fans there is a harrison tag (blue and silver tag facing down or to the rear door) that has some numbers on it? please post the numbers and the year and if the a/c is in a rear only unit or a part of the dual a/c with dash a/c and the rear unit.

I am trying to figure out if there are any other GM burbs or vans that have rear a/c units that could work in are old burbs.

Here is a example of the numbers off of my 71 rear only a/c unit. EAB 252-71B

On my 71 unit there are 2 fan motors that have a fan both sides of the motor.

The 72 a/c rear unit that is part of the dual a/c unit looks like it has only one motor with the fan on each side. I have not taken the 72 rear unit cover of to get the numbers.