Q: Brakes hard to push or stuck in park.

asked by on

We were parked facing down on an incline for about 2 hours (with e-brake on) and when we were about to leave and released the e-brake, we couldn't accelerate/decelerate or even roll when in Drive/Neutral/Reverse. The brake pedal was also hard to push down. We had to get it towed home (the wheels were still locked so they had to lift it) and tried again the following morning and the brake was still hard and wouldn't move, but a couple days later the car was running again. We drove it for a few miles okay, but the brake became slowly hard to push again, so we stopped driving it. The dealer is saying they need to replace the brake master cylinder kit for about $1300. I'm going to try another repair shop next, but wanted to get any additional input. Mahalo!

2010 GMC Terrain, 4cyl, SLT. 79600 miles.
Automatic transmission.

Hi there. Check the parking brake lever and cable. As the vehicle was on a hill and the parking brake was set, the cable could have gotten stuck or the parking brake assembly in the rear brakes could have failed and locked making the lever not return. Check the parking brake lever, cable, and the rear brakes and see if its working. For the service brake pedal being hard to push, there could be an issue with the brake booster with a vacuum leak. Remove and plug up the vacuum line to the brake booster and test drive the vehicle in a safe area. See if the symptoms are the same or get worse. If the symptoms are the same, then I recommend replacing the brake booster. If the symptoms get worse, then either the brake booster has a small vacuum leak and needs replaced or the master cylinder has a broken return spring jamming up inside the master cylinder. If you need further assistance with your brakes not working, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Brakes hard to push or stuck in park.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Brake booster has oil in it. Engine oil.

The vacuum pump was the source of the oil in all probability. Also, check the wastegate vacuum lines for any signs of oil. If there's any question then I'd suggest replacing them too. If you'd like a fresh set...

Q: Am I being lied to?

According to the GM parts catalog, toe links are used on some versions of the 2012 Terrain. When so equipped, the toe links are obviously never left off the vehicle at the factory simply because such links are an integral,...

Q: How do I release the parking brake?

The parking brake is a very important safety feature that helps keep your car from rolling when it is parked. However, it is very harmful to your vehicle to drive with the parking brake on. You should always release the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...