1999 C-1500 Suburban Coolant System Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

shultzee13 · 02-25-2013, 11:34 AM

Brand new water pump installed less than 6 months ago.

When driving vehicle water in reservior rises to the hot line and above slightly. Happens when running heat or AC. No difference. After car sits and cools water level returns to normal down to the cold line. Just started doing this yesterday.

How do I know if it's the water pump or the thermostat?
Would like to fix the right problem the first time. LOL

Thank you
Eric

02-25-2013, 11:34 AM	#1
shultzee13 Registered User Join Date: Jan 2012 Location: Tyler Texas Posts: 223	1999 C-1500 Suburban Coolant System Question Brand new water pump installed less than 6 months ago. When driving vehicle water in reservior rises to the hot line and above slightly. Happens when running heat or AC. No difference. After car sits and cools water level returns to normal down to the cold line. Just started doing this yesterday. How do I know if it's the water pump or the thermostat? Would like to fix the right problem the first time. LOL Thank you Eric



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