Something I noticed yesterday and this morning is when the engine is cold, even overnight and when I start it up the fan automatically kicks on, and doesn't quit. I drove it, got up to temp 195-210 and it was still on. No matter if the heat was on any position or even tot he off position.
I have been chasing a poor fuel mileage for awhile now and will be doing the fuel pressure test this weekend.
Would the constant fan running add to the poor mileage?
Thanks, sorry I didn't have time to research the site, but I figured I would get a quick answer.

 

See this thread: https://blazerforum.com/forum/engine...estions-84033/

 

Great, thanks a lot!