Only happens when very cold (less than -10 degrees). Recently the security light has been occassionally coming on when driving. Dealer looked at it and was able to confirm the issue but didn't find anything. (Fuel pressure ok) Hard to troubleshoot because of temp - once it warms up everything works fine (except for the occassional security light). Thoughts? Could this have anything to do with the Passlock security system? If so, how can it be troubleshot/repaired?
Check or change the etc switch by the thermostat outlet it tells the computer the temp and how to mix the fuel. It looks like a temp sw. but the temp sw is located In the head .
SOURCE: 1999 chevy blazer fuel problem
probably not fuel filter . probably going to have to remove the upper intake and replace the fuel injector spider(fuel inj assebly) if it is droping fuel pressure it is leaking into the upper manifold
SOURCE: 1998 Chevy tahoe Hard to start when cold
replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump
SOURCE: 2003 chevy silverado 1500HD LT. A/C fan works intermittently
First check fuses, then test blower motor, Last Temp control switch
SOURCE: I have a 2002 Chevy Avalanche, that the battery
if your security light is on it won't start. Leave the key for tens minutes or so until the security light flashes then it should start.
SOURCE: 99 chevy silverado running rough and stalling.
the problem you are discribing would lead me to belive your fuel filter is clogged which is a simple fix 3 dollar part at any part store or on the worse hand your fuel pump itself could be weak you can open the gas tank cover and have another person turn the truck key to the on position without going far enough to start you will hear a faint whining noise if it is going bad or a louder noise if it is fine Good Luck
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