1991 GMC Sonoma 6 cyl Two Wheel Drive Automatic 220000 miles
I have a 1991 GMC Sonoma 4.3L The truck is hard to start of the morning. After about 15 sec run time, the truck begins to flood/ses light comes on. I get a code 14 Temp Sensor high curcuit. I can't find the computer pin to bypass to from sensor. New sensor, tune up. Thank you for your time.
I scanned the truck with a Genisys Pro and with the engine off, Key on, the Genisys shows the coolant temp at 390*, also which sensor controls the ecm, the single wire on the side of the block or the two wire by the thermostat?
August, 27, 2009 AT 10:22 AM
The coolant temperature sensor is located on top front of engine-see item D below