I have a 2002 suburban 8.1 L with only 110k and I am smelling coolant when I stop. I thought it was the water pump but it's completely dry. While checking further, I noticed that it is coming out the back passenger side. I noticed a drip on one of the screws on the starter motor. Where is this leak coming from?

 

Since its a Suburban, check the extra coolant hoses that Suburbans use to get hot fluid to the rear heater. They have a fair number of fittings near the passenger side of the engine. Perhaps one has a pinhole leak?

SD