Skip the auto shop - Our mechanics make house calls

Q: Suburban won't start with no interior lights at all

asked by on

My truck will not turn over or anything. No dashlights/radio/security telltale. I've tried about every fix I've found and haven't come up with anything. Before all this it would turn over but die within seconds and like an idiot I disconnected the bcm without disconnecting the battery and now I'm down to nothing happening. Did I fry my bcm?

My car has 174000 miles.
My car has an automatic transmission.

A: It is possible you did burn out the BCM. Th...

It is possible you did burn out the BCM. The BCM relies on grounds in the harness and when you disconnected it, you may have disconnected the wrong connector first and it will burn out the internal circuits of the BCM. I recommend having the system checked first to see if it can be scanned, and then diagnose any codes before replacing the module.

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: No crank no start from ignition

Be sure any engine immobilizer system (security system) is not activated, thus preventing the car from starting. Broadly, either the starter motor/solenoid assembly is faulty or the electrical circuit supplying the motor has a fault. That circuit begins at the...

Q: Starting problem, engine revs at low RPM in drive - 1999 Chevrolet C3500

It sounds like the Idle Air Control valve is gunked up. It may be possible to clean it, or it might have to be replaced. A YourMechanic professional can help to diagnose the stalling issue and replace the idle air...

Q: Difficulty starting and stalling issue on a 2001 Chevrolet Impala

That is a pretty new vehicle in terms of young-born computers. When something goes wrong with the car or when it's stalling out, the computer records that data and the mechanic can read that data. If you want to try...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...