I've been having overheating problems, and have replaced the thermostat and checked the coolant, to no avail.
Here's the level of overheating: today was 95 degrees, and in stop/go highway traffic I was able to manage if I kept the AC off. If I turned it on, the needle would begin to rise. So I assume it's not a catastrophic issue like no fan or coolant.
Someone suggested that the fan wasn't kicking into high speed correctly - is this possible?