I have a 1992 GMC Sierra 1500 Z71 5.7 liter. In the summer time if I use the A/C or tow anything much over 1000 pounds it overheats. I replaced the fan cluth and it helped a little but I think its the radiator. Now that its winter I replaced the thermostat due to the failsafe being activated. It is a 195 degree therm. And my engine wouldn't get above 140 degrees. Thought the new thermostat my be faulty, got a new one, still the same. Will not get above 140 degrees unless I'm driving at high speed on the highway, still only 180 degrees. I have no idea why it does this. The temp guage also works correctly
have the same problem?
Tuesday, December 5th, 2006 AT 9:53 PM