Question about 2000 GMC Sierra
1999 GMC Sierra 5.3L V8 useing 6 quarts u.s.
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Posted on Jul 07, 2010
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Posted on Jan 02, 2017
30-40 psi of oil pressure is fine for many vehicles including your GMC. I am assuming that the truck has more than 100,000 miles on it and still has the original engine in it. By rule of thumb you only need 10 psi per 1000 rpms in a typical street driven engine to give adequate oil pressure to keep the bearings from oil starvation. The oil pressure is typically higher when initial start up occurs because it is more viscous due to the temperature of the oil as the engines oil warms up the visconsity thins out and the oil flows more smoothly. The drop in oil pressure is a normal occurance. Above 45 is more than required for a daily driven street engine. I believe that the specs on that engine only list 30- 45 psi.
Posted on Dec 07, 2008
Turn your key to the on position (don't start it) and depress the fuel pedal down 3 times to the floor within 10 seconds..
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Posted on Dec 15, 2009
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