Overheating 350 FI V8 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Widow · 03-19-2004, 02:15 AM

I have an 89 GMC Suburan with a 350 FI V8 which is overheating. So far we have replaced the water pump, thermostat, radiator hoses and radiator cap.

When on the highway with a steady acceleration it overheats, but as soon as you let off the accelerator to slow down...the temp drops.

I am looking for any suggestions as what to check next as we are getting fairly frustrated.

Thanks, in advance, for any help you might be able to provide.

03-19-2004, 02:15 AM	#1
Widow Registered User Join Date: Mar 2004 Posts: 3	Overheating 350 FI V8 I have an 89 GMC Suburan with a 350 FI V8 which is overheating. So far we have replaced the water pump, thermostat, radiator hoses and radiator cap. When on the highway with a steady acceleration it overheats, but as soon as you let off the accelerator to slow down...the temp drops. I am looking for any suggestions as what to check next as we are getting fairly frustrated. Thanks, in advance, for any help you might be able to provide.



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