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Old 12-13-2006, 10:51 AM
Join Date: Dec 2006
Posts: 2
Default 4.3L Oil Capacity Help?

I recently purchased a 1990 Sierra with a 4.3 L engine. When I changed the oil something close to 6-1/2 quarts drained out. The dipstick is not original so I am not sure what the true capacity is. The engine has an oil cooler hookup from the radiator to the oil filter adapter so that might explain the additional oil. Can someone provide the answer?

Also, where is the casting code and engine pad numbers on the 4.3L engine? I am trying to confirm if it is the original engine or a later generation. I searched in the typical places as on a 8-cylinder SBC but there is a lot of plumbing and accessories in those areas. So before I go moving stuff around, can someone please confirm the locatioss?

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Old 01-10-2007, 09:57 AM
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Posts: 826
Default RE: 4.3L Oil Capacity Help?

The only thing I know is the capcity is 5 qts. .... Sorry.
2002 Silverado ecsb 2wd 5.3 4L60E 3.73's G80, headers, tbs, 160 degree tstat, redneck ram-air, dumped exhaust, throttle body bypass, air gap, descreened MAF, 255/65R16, Royal Purple Fluids, A/F gauge, efans Wheatley Tune more. 14s in 1/4
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Old 01-11-2007, 02:17 AM
Join Date: Nov 2006
Posts: 7
Default RE: 4.3L Oil Capacity Help?

I work at a Jiffy Lube. The oil capacity of a 4.3L is 4.5 qt.
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