Skip the auto shop - Our mechanics make house calls

Q: No crank no communication no start chevy

asked by on

I have recently changed the transmission in my lumina 2004 after changing it my car is not showing engine light cranking but not starting and no communication to computer at first the security light was blinking but now its not flashing when insert the key have checked the fuses every thing is fine had also replace ecu but still the same no communication and also replaced the transmission chip to my old transmission chip but still nothing plz help?

My car has 200000 miles.
My car has an automatic transmission.

A: Hello and thank you for contacting YourMech...

Hello and thank you for contacting YourMechanic. The issue that is occurring is the wiring to the range switch on the transmission. Try taking the range switch, the switch that is on the shifter to the transmission, from your old transmission and put it on. If the old transmission is no longer available, then I suggest replacing the range switch with a new one. This is a common problem with many Chevrolet vehicles. If you need assistance in troubleshooting your no start situation, then seek out a professional, preferably a YourMechanic professional to help you with your vehicle.

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 heat

Common causes of no cabin heat include malfunctioning blend door(s) (part of the in-dash ventilation network), a faulty or stuck heater control valve, a plugged heater core, a stuck open engine cooling thermostat, collapsed hoses, and low coolant level. The...

Q: Starts only when moving flywheel

Hello there, there are a few potential reasons for why your car will only start when the flywheel is turned. The most common would be the crankshaft position sensor, weak or binding starter, or a faulty cam sensor. If you...

Q: I am going to attempt to change the wheel bearing or hub asssmbly on my car.

This is a repair that is going to take require some specialty tools and techniques to complete correctly. It would be highly advisable to have a certified mechanic perform this or possibly assist you with the repairs, especially if the...

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 Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...