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Re: front and rear expansion valves for suburban
i just went thru the whole system on my 1991 burb, which i think its the same design as yours.. if so, it uses a orifice tube for the front and a expansion valve in the rear. the orifice tube goes in the bottom of the evap coil. it is directional so make sure it goes in the correct way(dont ask how i know ,lol) hope this helps: gmc2:
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