P0335 on a GMC: Causes, Fixes & Repair Cost

⚠️ Severe · not recommended to drive

The engine may crank without starting or stall, so have the GMC towed to a shop.

What P0335 means on a GMC

On a GMC, P0335 means the engine computer isn't getting the crankshaft position signal it needs for spark and fuel. The engine may crank without starting or stall, so the vehicle should be towed.

Is P0335 common on GMCs?

GMC crankshaft sensors fail with age on trucks and SUVs like the Sierra and Acadia. Salt, moisture, and heat can damage the sensor wiring, a common cause alongside a worn sensor itself.

Commonly reported on: Sierra, Terrain, Acadia, Yukon.

Symptoms

Engine cranks but won't start
Engine stalls while driving
Check engine light is on
No spark reaching the spark plugs

Common causes

most common: Failed crankshaft position sensor
common: Wiring damaged by salt, moisture, or heat
common: Loose or corroded sensor connector
less common: Damaged trigger wheel or reluctor teeth

How to fix it

Fix	DIY?	Typical cost
Replace the crankshaft position sensor	Yes	$50–190
Repair damaged wiring or the sensor connector	Yes	$20–150
Have a shop replace the sensor and clear the codes	Mechanic	$150–400