Cranks without starting and sputters after releasing the key. Will do this until the battery is near dead then will start up. Runs terrific for another week and will do this again. In between these episodes it starts without a hitch as soon as the key is turned. No issues of dying out and seems to happen when it is very damp out.
I HAD this problem after I first bought the vehicle. My Burb wouldn't start for 5 minutes to 5 hours to 2days, then start as if nothing was wrong. Dealership replaced the fuel pump under the warranty the 1st time it happened, and it was fine for several months, then it started happening again. I would take it in sometimes tow it in, they would keep it, it would start and they couldn't find a problem. Finally after several years of this sporatic issue I informed GM that it was my belief that the dealership was trying to force my Suburban into the Lemon Law rather than fix it under the warranty. Finally as things were becoming heatednat the dealership one day the Sales Manager (the former Service Manager) told the service representative to replace the Fuel Pump again, under the assumption that they replaced a defective fuel pump with a brand new defective fuel pump if they came from the same batch! Solved the problem. It has been over 10 years and no problem with starting.
Cranks and wants to start at end of cranking , will not fully start .
The symptom was hard starting; it used to start first shot, but gradually wouldn't catch and you had to crank again. I ruled out tune up as that was done recently. I googled the symptom and immediately spotted fuel pump possibility. I spoke to coworker with similar truck and he had the same problem and told me change the pump before I'm stranded, which I did.