Camshaft position sensor gmc acadia 2009 - 2009 GMC Acadia

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Question moved to model category.

Crankshaft position sensor location - Colorado Fans

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Dec 16, 2009 - Hey everyone.. do ya know where the crankshaft position sensor is located on our engines? It would be a big help if someone could point me ...

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Behind the harmonic balancer on the crankshaft.

Your vehicle has no fuel pump relay . Has a fuel pump flow control module .
Fuel Pump Flow Control Module (FPCM)
The fuel pump flow control module (FPCM) is a serviceable GMLAN module. The FPCM receives the desired fuel pressure message from the engine control module (ECM) and controls the fuel pump located within the fuel tank to achieve the desired fuel pressure. The FPCM sends a PWM signal to the fuel pump, and pump speed is changed by varying the duty cycle of this signal.
Plus it has two fuel pumps !
The high pressure fuel pump (9) is a mechanical one cylinder design driven by an eccentric on the exhaust camshaft (1) of bank 2. High pressure fuel is regulated by the fuel rail pressure (FRP) regulator, which is a part of the high pressure fuel pump. The FRP regulator is a magnetic actuator which controls the inlet valve of the high pressure pump. The ECM provides battery voltage on the actuator high circuit and ground on the actuator low reference circuit. Both circuits are controlled by the ECM. When the ECM deactivates the FRP regulator, both circuits are disabled and the inlet valve is held open with spring pressure. When the ECM activates the FRP regulator, the low circuit driver connects the low reference circuit to ground and the high circuit driver pulse-width modulates (PWM) the high circuit. The ECM uses the camshaft and crankshaft position sensor inputs to synchronize the FRP regulator with the position of the eccentric on the camshaft. The ECM regulates fuel pressure by adjusting the portion of each pump stroke that provides fuel to the rail. The high pressure fuel pump also contains an integrated pressure relief valve.
Your best bet is have it towed to the dealer , you don't want to mess with the high pressure pump .
Pluse

Reverse sensor is bad or transmission in reverse is locked up.

I would go to what we use to call a junk yard.

sensor is probably around 50 dollars maybe

Try this YouTube video:-
2009 GMC Acadia spark plug replacement

Pull it up end down , it should lock in to position ,when it hits a slot on the shaft, If not there is something broke on the locking mechinissim

i have the same gmc acadia 08 and same problem .its bad crankshaft position sensor. i put new one it and now everything good

There is a bulletin (or recall depending on your mileage) for this issue. The timing chain stretches due to lack of oil lubrication. The acadia engine is very sensitive to timing chain stretch. There are 2 things they will do. The first is a reprogram to let the PCM adjust for minimal extra slack, they will say to drive it and if it doesn't come back on you're good just keep up with the oil changes (5k miles or less with dexos oil). If that doesn't work they will have to drop your engine and replace all 3 timing chains. It's an all day event and may even take an extra day.