1997 GMC Sonoma radiator pressure

1997 GMC SONOMA
148,000 MILES • 4 CYL • 2WD • MANUAL
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DEKNBLUZ
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I'm leaking coolant. From a visual inspection, it appears to be leaking from the radiator, not the hoses. I have rented a pressure test kit from a local parts store, but no one knows how much pressure is normal for my make/model. How much pressure should be in my radiator?
Dec 23, 2009 at 1:18 PM
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MHPAUTOS
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Hi there,

Thank you for the donation,

I don't have any specs for your car as i am in Australia, but all radiator caps have the system pressure stamped on them, check this first, but in any case your cooling system should not have any leaks, have the radiator repaired or replaced and if you are still in don't about the system pressure the radiator repairer will be able to advise you of the correct system pressure for this car.

mark (mhpautos)
Dec 23, 2009 at 3:19 PM
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DEKNBLUZ
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The markings on my radiator cap have worn off, and I don't have an owner's manual. That's why I posted the question here on this site. I'm wanting to pressure-test the radiator to determine if that's what needs to be replaced.
Dec 23, 2009 at 6:59 PM
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MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
HI there,

I have found it, it should be a 15 PSI cap.

Mark (mhpautos)
Dec 23, 2009 at 7:08 PM
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