P0741 on a GMC: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

A GMC with P0741 is drivable, but the torque converter won't lock up, so fuel economy drops and the transmission runs hotter.

What P0741 means on a GMC

On a GMC, P0741 means the torque converter clutch isn't locking up when the transmission computer commands it. GMC trucks and SUVs use GM's 4L60E and 6L80 transmissions, which are known for TCC solenoid wear at higher mileage. When the lockup clutch slips or stays off, the computer logs this performance code.

Is P0741 common on GMCs?

P0741 is a familiar code on higher-mileage GMC trucks, where TCC solenoid failure is a documented pattern. Low or old fluid makes it worse, and a shudder at highway speed is a common early warning sign.

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

Symptoms

Check engine light on
Higher RPM at highway speed
Reduced fuel economy
Possible shudder at cruising speed

Common causes

most common: Worn torque converter clutch solenoid
common: Low or old transmission fluid
common: Worn torque converter clutch
less common: Transmission pump wear or low line pressure
less common: Valve body wear

How to fix it

Fix	DIY?	Typical cost
Check the fluid level and change old transmission fluid	Yes	$20–70
Replace the torque converter clutch solenoid	Mechanic	$100–400
Replace the torque converter if the clutch is worn	Mechanic	$800–2000