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2004 GMC Sonoma SLS Crew Cab 123 WB 4WD

2004 GMC Sonoma
Trim Info:
4-Wheel Drive, Crew Cab 4.7' Fleetside SLS
15 mpg city / 19 mpg hwy
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September 7, 2012, 8:17 am

Douglas B

Question: radiator leak

I was driving and temp gauge went up steam from under hood stopped and radiator was steaming near the top front cracks visible on top my question is when i look at replacement it does not seem to come with that top part on the radiator, also filled coolant and restarted it after 1 day and took a long time idiling 15-20 min to get hot and start spewing steam i also do not feel any water going thru the top hose ? no sign of leaking at water pump and did not throw a belt my concern is that i replace radiator and find out the water pump caused the radiator to overheat and caused the cracks
Thanks Doug b

September 9, 2012, 10:08 am

Ron W
Expert Mechanic

Have the system pressure tested. If there are other leaks, this will find them.

When you refilled it, did you bleed the air out of the system? It sounds like you may have an air bubble in it causing to slow warm up/overheat issue.

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