about a month ago my '88 K5 started taking a lot longer to start when cold. sometimes i have to cycle the starter for about 10 seconds 2 or 3 times for it to start. i replaced the fuel the filter shortly after it started doing this and it didn't help. once it's been started and running for a while it starts fine if it doesn't sit for too long. i know this has been covered before, but i couldn't find anything with a search. any help would be appreciated. UPDATE!! replace the engine temp sensor a couple of nights ago, helped a little, but still taking a little while to start, but not as long. replaced the fuel pump relay a little while ago, started up like a dream, it had been sitting for about 6-7 hours when i did this. last week if it set that long, took my about 2-3 times cycling the starter for about 10-15 seconds, i even started pumping the gas to get it running, let's hope that replacing both of those pieces solved my problems. THANKS TO ALL WHO OFFERED UP ADVICE, AND INFO. ON THIS PROBLEM I WAS HAVING.