Skip the auto shop - Our mechanics make house calls

Q: Transmission will not shift out of 1st gear

asked by on

I am trying to locate the fuse boxes in my truck. To explain, the transmission will not shift out of 1st gear. I think that perhaps a fuse has blown and I want to check it out. However, I'm not sure if there is only one fuse box in my truck. I am assuming it is inside the cab and under the steering wheel or it might be under the hood somewhere. Would you please tell me where it is and how to access it? Thanks.

A: Hello there, thank you for asking about you...

Hello there, thank you for asking about your 2006 GMC Sierra 1500 HD. If your vehicle will not shift out of first gear, the problem is not the fuses. The problem could be a shift solenoid, but more than likely, you have an internal transmission issue that will require rebuilding or replacing the unit. The 1-2 shift valve may be the problem. A professional, such as one from YourMechanic, can diagnose your shifting problem.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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!

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: Broken gearshift lever

The gear shift lever on the 745Li is a complete electronic unit that is mounted on the steering wheel. If the paddle is broken, then the whole unit must be replaced. Removal of the air bag is required for this,...

Q: Car won't shift out of Park

One of the more common reasons I have come across as to why your Chevy will not shift out of park is the brake light switch failing. It is natural to ask why the brake light would prevent your Chevy...

Q: Transmission issue 2008 Chevrolet Silverado 1500

Your transmission may have a defective forward sprag unit inside the transmission that needs replaced. Have the transmission mechanic follow technical bulletin 08-07-30-027 that the manufacturer put out in 2008. There is a list of failed parts and procedures that...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...