the coolant temperature sensor could be faulty.......
condensation
glow plugs
There are a few reasons why a 2004 Avalanche may have a hard time starting in cold weather. Reasons include the battery being cold which takes longer to start the car and the oil is colder which causes slow starts.
This may be a sign that your battery needs to be replaced. However, there may be other causes as well.
You should check if your Battery is weak for it can cause the delay in starting your car.
Located in the fuel tank remove to access
A car may start better in the afternoon, because the heat of the sun has warmed up the engine. Once a car has sat over night, it may be difficult to start in the morning because the engine is cold.
car dies when running then hard to start ,if it will start
no
It is possible, very hard to tell. There are many things that will keep a car from starting. Possible causes are fuel system, ignition system,.....
check the fuel pump relay. it may be overheating.
Anytime a puff of smoke comes from a car it is usually not good unless it is a cool morning and it is a cold start. This causes condensation because hot from the exhaust meets cool air.