Maintance is where it's at! That is pure and simple not checking things regularly. More people leve themselves on the side of the road from stupid thingins just like that. If it were me and I paid them to look it over and they didn't catch THAT I'd be demanding a refund.
I have finnaly solved my cooling issues with my 454 in my Suburban. Bad fan clutch that was replaced with another BAD fan clutch from Autozone.

and a radiator. Had AZ swap the clutch while I was dropping in the radiator. Replaced all the hoses while I was at it.
If it was over 85degrees out side and I had the A/C on it was overheating. Now it might hit 215 after just getting off the hwy and idling for 5-10 minutes. The Aux fan kicks in and it doesn't go any farther. Exactly as it should be. I also run a 60% water mix. down in the SE we don't need a 50/50 and it actually hurts cooling. Antifreeze does not exchange heat as well as the water does. I'm good to 22 BELOW and in the 24 years I have lived in Atlanta I have never seen it that low. I think we hit zero a couple times.
