Matahoe
Full Access Member
Ugh. Today was a real challenge for my Tahoe it seems. It was 32 F this morning and the coolant never reached half way on the gauge (about 175 F according to my scan tool). I drove about 3 miles, let it idle for about 15 min and it still didn't reach operating temperature. I even revd up the engine to 2000 rpm for a few minutes and it still didn't budge. I actually saw temps drop a bit. So I decided to see if there was anyway to check the cooling system per the repair manual. Maybe there is something in there with troubleshooting steps or perhaps a time vs temperature plot? Maybe there is something that tells you if it is taking too long to warm up? Well I looked and depressingly found only basic information. The only thing I found was this brief troubleshooting guide. Needless to say there needs to be a better way to check a cooling system other than making the technician take out the thermostat and check it in a pot of hot coolant. Have things improved any with more late model vehicles?