2010 GMC Sierra 5.3 (p0011 timing issue/no start)

Taylor Orsack · August 27, 2019

I am really stumped here, hopefully someone can give me some insight. I’ll try to keep this short and direct

was cruising about 35 mph 1500 rpm, truck suddenly died and wouldn’t start back up, thought it was a fuel pump at first. Had it towed home

then the next day I tried some trouble shooting,

P0011 code “A” camshaft position -Timing Over-Advanced or System Performance Bank 1

checked fuel and spark all good. Next I checked compression, I have no compression on about half of the cylinders, I tried changing the camshaft position sensor, no luck

it does start if the motor is cold, runs good as far as I can tell for about 60-90 seconds, then dies, no start once engine is warm

currently have it at the dealer ship and all they are telling me is no compression and it needs a motor, I’m really hoping it is something stupid I am overlooking( i read something about the connector that plugs in to the camshaft position sensor shorts out due to heat or something )

i dont wanna spend $6K on a motor please help if you have any knowledge on this

thank you

Edited August 27, 2019 by Taylor Orsack
Engine code

Formulabruce · August 27, 2019

While you might get more and better responses in the 1/2 ton truck section, I will take a shot at this.

HOW MANY MILES ON IT?? ( should be in the question)

ANY CODES? ( should be in the question)

1. It DOES run when COLD, and thats' in whats called 'OPEN LOOP" ( before complete computer control)

When it runs in Open loop, does it run on all 8 cylinders?

When it runs in open loop does it sound normal? Vibrate? High Idle?

Can truck move under its own power in Open loop, and how does it run?

Does truck smoke?

IF it runs well in open loop, it could be just a throttle body issue. Needs the front boot off the air intake and cleaned Really, really well with throttle body cleaner, everywhere.

Any codes?