Question about 2000 GMC Sierra 3500

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Cam ****** is at 16 and its calling for 0,2 to -2. and when its hot it drags to start and its poping and running rough. has code p1345

Truck has 236,500 miles on it. would it be the distributer wore out or the timing chain and gears

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With that much mileage everything is worn!

code p1345 which is crank shaft camshaft position error code.

If the distributor moved that is why the code is present. The dis. in these trucks does not control ignition timing it controls injector timing (it is the cam sensor).

Posted on Jan 22, 2013


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Posted on Jan 02, 2017

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SOURCE: 1999 G1500 5.7 Timing issues?

dan12, I have a 2000 savana that had exact same issue, at least appears to be same. Sometimes it would start fine, other times it would act like it was out of time. Finally we had to get it towed because it would not start, turn over, but not start. Probably all over about a three month time frame. The solution that is still working after a year was to replace the distributor cap, it was allowing moisture in. I have seen a moisture reference on line before, never have seen the final outcome. I know it sounds simple but my vehicle went from not being reliable to using every day.

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SOURCE: GMC Sierra 2002 4.3 V6 P1345

intake gasket i had the same problem with my truck

Posted on Mar 09, 2009

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SOURCE: 02 GMC Sierra 4.3 V6 P1345

Well that sounds like a tough one , But here is a site worth checking out . Several mechanics use this it to help out people like your self that are frustrated and are getting P #$%$# off ! Good luck

Posted on Mar 09, 2009

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SOURCE: i have 1998 sierra 1500 vortec 5.0 liters,when

Camshaft To Crankshaft Position Correlation Fault is what p1345 means. if the problem isnt electrical I would imagine the timing chain could be stretched and the engine is out of time somehow

Posted on Nov 18, 2009

  • 1 Answer

SOURCE: Truck starts, runs for 5-10 seconds, then dies

take out your mass airflow sensor located on air intake pipe and clean with brake cleaner also is your engine light on?

Posted on Jan 07, 2010

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Trouble code P1345. please can you tell me what has went bad

p1345 refers to Camshaft to Crankshaft correlation problem.
Could be distributor turned at wrong angle in relation to where it should be:

Camshaft ****** Offset Adjustment NOTE: Ignition timing cannot be adjusted.
  1. With ignition OFF connect scan tool.
  2. Start engine and allow it to reach normal operating temperature.
  3. Increase engine speed to 1,000 RPM. NOTE: The cam ****** offset reading will not be accurate below 1,000 RPM.
  4. Use scan tool to monitor cam ****** offset.
    • If the cam ****** indicates a value of 0° the distributor is adjusted properly.
    • If the cam ****** does not indicate a value of 0° the distributor must be adjusted.
  5. Use scan tool to monitor cam ****** offset.
  6. With ignition OFF, slightly loosen distributor hold down bolt.
  7. Start engine and raise speed to 1,000 RPM.
  8. Monitor cam ****** offset using a scan tool.
  9. Rotate the distributor as follows;
    • If the reading is negative, rotate the distributor in clockwise direction.
    • If the reading is positive, rotate the distributor in counterclockwise direction.
  10. Rotate the distributor until 0° is obtained.
  11. Turn ignition OFF.
  12. Tighten hold down bolt to 25 ft lb (3 Nm).

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