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I know that there are hundreds maybe thousands of posts regarding this topic and I swear at this point I've read 80% of them if not all of them... still no solution.

I recently purchased a 2007 Silverado 1500 5.3L Crew

Purchased with the check engine light on and code p0335 (crankshaft position circuit A)
Drove two hours home no issues.

We went to try and repair the code and started by replacing the crank and cam sensors.
We also decided to take a look at the timing chain and upon opening discovered that the tensioner had snapped and was in pieces and the chain was barely on (truck ran so well never would have known without opening) We replaced that too.

Just as a fail-safe we also replaced all the plugs and wires.

Going for a drive the stabilitrak/traction control/check engine light all come on with symptoms:
-Rough shifting going from 1st to 2nd gear
-Random engine shut off typically at idle (would start back up after re-cranking)
-Code P0335 still there

We did some further testing and found low fuel psi (25psi) so we ended up replacing the pump.

We also did our best to check grounds and wiring, although old looked to be fine.

We replaced other minor parts and at this point we are over $1,000 in new parts alone. The issue still remains.

What is really stumping us is that the codes are somewhat random. Sometimes we can drive for 3 hours no issues and others 5 minutes and all codes come on.

Really don't want to spend more money replacing parts on just a guess, any input of feedback would be much appreciated.


Other related or maybe nonrelated things I've noticed:
-Code read p0335
-Rough shifting from 1st up to 2nd gear
-Engine runs rough or will shut off at idle (has shut off while driving as well about 45mph)
-A/C seems to not function correctly sometimes when lights come on
-RPM guage will stop working when the lights come on and if it remains on the rmps act weird not as they should
-Lights/display on radio will flash brighter sometimes before codes come on (only happened twice that I noticed)
 

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98 gmc k1500 5.7
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510 Posts
when you installed sensors did you do a relearn with a scan tool, like all computers , you can't add a part without telling computer to find it and use it.
 

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splexdinky, wow you wrote about my truck as well! I have a 2007 GMC Sierra SLT Crew Cab VMax 6.0L with the exact same issues. And Brian to answer your question, I've had the CKP replaced and re-learned only to continue to have the same issues. It's currently at our mechanic's shop (been there since May 4, 2021). They cannot seem to find the problem.
 

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Same here, I have a 2010 Silverado z71 5.3 1500 6 speed auto. bought it with engine light on.(p0335, p0449) both Permanent codes, as well as the stabilitrak and traction control service message. Looked the two codes up, and replaced the camshaft position sensor. Still have a long crank(4-5secs) then slight stumble upon start up then idles pretty good. Tachometer is at 0, then after pulling out of the driveway it used to jerk pretty bad heading down my hill but that went away (been about 2 weeks) when I pull off from a stop light or sign very low acceleration so I noticed by the time I’m I hit 5mph I’m in 3 gear if I switch it to manual it’ll run ok but in auto it’ll jerk pretty hard cruising at abt 50-60 mph
Tried looking through these forums to no avail please help !!!!!!
 

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It sounds like a bad Throttle Position Sensor to me.
 

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It probably should throw a P2135
Check out tech serve bulletin 11-06-04-007B.
 

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98 gmc k1500 5.7
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noiizy , can you tell us what state and area your in , maybe we can get you to the right person to solve your problem , there are some great drive-ability techs all across this country
 
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