06 Chevy Silverado 1500 V-6 4.3l cranks won't start

Asked by Jake Jan 13, 2020 at 11:48 PM

Question type: Maintenance & Repair

need help bad folks. Truck has to be fixed by Thursday.
Here's the story. 3 weeks ago truck ran beautifully. I knew
battery was on last leg. A few nights of temps in the 20s
and battery was dead. I replaced it. Turned the key and
click....click.....click. I got my hammer and smacked the
starter a few times. I turned the key and it tried to crank but
starter froze up. I replaced starter. I turn the key and motor
turns over but will not crank. It has spark. It has fuel. It has
no life. I've had both the battery and starter tested since
installing them....all good. I cleaned all electric contact
points on terminal cables and starter wires. It made the
truck turn over better but still no luck. I was told it's a
possible crank sensor issue by one of the very few people
that has the intelligence to offer valid opinions. After
getting the run-around from Google and YouTube about
location of Crankshaft Position Sensor I finally found it but
was told that since the truck is getting spark that it was not
going to be the sensor. I still have sensor and thinking im
gonna swap that as well just in case unless I learn
otherwise here.
I'm a 20 year experienced carpenter. Im not an expert
mechanic... and not having the knowledge I need means I
have to rely on the help of others, which generally speaking
is hard for me to do. I have the ability to do anything
needed. I just don't have the knowledge to troubleshoot and
pinpoint EXACT issue. I ordered a scanner last night and it
gets here tomorrow, but there are no lights illuminated on
dash board to indicate that a code may be waiting.
I've only had truck 2 months. It's my first Chevy Truck. It
may very well be my last if I can't resolve this issue. Please
Help.thanks

1 Answer

27,530

Battery has a full charge and connections all good? What about your security system? If you have passlock security system, that is usually fuel injector disable. Sometimes when battery voltage is lost it may trip the security system? You can try relearn, don't know if it will help or not? Connect battery charger and set to lowest charge rate. Turn ignition switch to run position. The mil will illuminate for 10 minutes. When the mil turns off, turn the ignition switch off for 5 seconds. Repeat steps 2--4 two more times. When the mil turns off after the third 10 minute period, turn the key off and then start the vehicle. I don't know if security system is your problem, just a thought? If you have spark at the plugs I don't think the crank sensor is the problem. I did see tsb for cranks good but won't start because of compression loss when cold. If cranking rpms are faster than normal, you may not have cylinder compression? Compression loss due to sticking valves. The bulletin gives cleaning procedure.

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