it has been cold in Montana and even though my truck is inside a garage, I had not trouble starting it about 2 weeks ago, and the first sign of the cold (30's) is when the starting problem started. my next move is to remove the plugs and see if it turns over easier. Next I am going to drain the oil, and if I got some resistance still with the plugs removed, I will use KOIL, which I ordered and should be here today. one thing I forgot to mention, I have a factory installed hydraulic pump, operated off a fan belt, could that be the source of the problem. I have not got it operational since there was a leaking hydraulic cylinder on the bed, when I got the truck this summer. Just a though, I am just baffled that I replaced the battery, cables, adn starter, to improve the starting issues, and not it seems to have gotten worse. I am told there is less than 600 miles on the rebuild of the engine. thanks for all the input!