Mechanics

OIL PRESSURE KILL SWITCH

1999 GMC Savana

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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KenAsh
March 9, 2008.



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.

Merlin2021
Mar 9, 2008.
Will a faulty oil pressure switch also make it not start?

Tiny
Slyguy61520
Jan 19, 2009.
Yes, it's a saftey system.

Merlin2021
Jan 20, 2009.