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hello, i have a 1993 suburban, 5.7 engine with 233,000 miles on it. recently i've been losing oil pressure after it warms up good and in the idle position. it still only uses a little over a 1/2 of a quart between changes. so this past saturday i decided to check my sending unit and guage. seems o.k. then i pulled the pan, to change the oil pump. the screen was not clogged, seemed to be pretty clean for the miles on her. had just a very tiny amount of metal in pan, which i believe was since new. i put her back together with a standard melling oil pump, new oil and filter. still after it warms up, same problem. any suggestions? i know i need to put a mechanical guage on her to make sure of my guage. any help would be appreciated. thanks, gizmo
 
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