OIL PRESSURE KILL SWITCH

1999 GMC Savana

Tiny

KenAsh

March, 9, 2008 AT 8:41 AM

Engine Mechanical problem
1999 GMC Savana V8 Two Wheel Drive Automatic 71000 miles

Do 5.7L GMC vans have an oil pressure kill switch, activated by loss of oil pressure?
Thanks for any replies.

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3 Answers

Tiny

merlin2021

March, 9, 2008 AT 9:02 AM

Try this simple test, locate the fuel pump relay in the under hood fuse relay center, with engine running, pull the fuel pump relay, if the engine stops running the oil pressure switch is faulty, if it continues to run, it's OK. Any codes stored? SES light on? Retrive codes and freeze frame data, post here. The switch is on the top rear of the engine, and has a three wire connector.

Tiny

slyguy61520

January, 19, 2009 AT 6:59 PM

Will a faulty oil pressure switch also make it not start?

Tiny

merlin2021

January, 20, 2009 AT 4:47 PM

Yes, it's a saftey system.

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