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1991 GMC Sonoma 4.3L Oil Pressure Guage
Posted to GM Engine on 10/9/2001 9 Replies

Oil Pressure in truck When Cold reads about 40 psi as the motor warms up the pressure drops to zero. If you give it gas the pressure goes back up to 40. I put a new oil pressure switch on, as well as verify pressure with my own guage. I have saw alot of this w...

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car Vehicle Data

1991 GMC Sonoma

VIN 1GTDT1421M
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI
AffectedOil Pressure Guage
Message Closed w/Summary

car Vehicle Data

1991 GMC Sonoma

VIN 1GTDT1421M
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic
DeliveryFI
AffectedOil Pressure Guage