Q: My 2004 suburban has D 3 2 1 what should I drive in D or 3

asked by on January 02, 2017

I have a 2004 and have never seen the D 3 2 1 on any of my vehicles is the D overdrive? And do I use the 3 in town?

My car has 77000 miles.
My car has an automatic transmission.

The computer controlled automatic transmissions in today’s vehicles are designed to be completely intuitive. You will not gain any performance advantage, or gain in fuel economy, by driving around town with the shifter in the 3 setting. For the best performance, simply put the shifter into the D (or drive) position and drive normally. The only caveat is when towing a load that is equal to, or more than, 75% of the vehicle’s towing weight capacity. When towing a heavier weight, it is recommended to engage the tow function on the transmission by depressing the button located on the end of the shifter. Depressing the tow button tells the transmission to expect a larger load and it will use a different set of parameters for shifting. So, unless you are towing fairly heavy loads, it is best to just put the shifter into the Drive position.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What others are asking

Antifreeze leaking from banjo bolt

You should have a sealing washer on each side of the banjo so it will seal.

car makes a sandpaper rubbing type noise, the rpms don't want to go up as usually it shifts gears very weird

Hello. It sounds like the vehicle may have an issue with the drivetrain such as a transmission malfunction or a wheel bearing being bad. When some wheel bearings go bad they will lock up and cause your car to feel...

Why does my traction control and ABS light keep coming on?

Hi There, It sounds like you may have a faulty ABS control module or potentially some bad wheel sensors. Your car is equipped with wheel speed sensors at each of the four wheels which monitor wheel speed while relaying this...

Engine threw a rod out of the engine due to water being sucked in. 2004 Toyota Tundra

Hello - the engine designation within the Vehicle Identification Number (VIN) is position 8. An engine coming out of another 2000-2006 Tundra with the same digit in position 8 should be the correct match. If you have the V6 engine,...

Can a dead battery cause my engine to stop working?

A dead or internally shorted battery can not only cause a car to stall but it will also overload the alternator as the alternator attempts to both charge the dead battery and supply the car's electrical needs. The battery can...

Shaking when braking and clanking/banging noise coming from what seems to be the exhaust.

Hello, thank you for writing in. The vehicle is likely facing two different issues. While it is possible you are feeling a rough idle in the steering wheel, you may be facing a worn or dirty brake. The extra strain...

My bus is not starting.

It sounds like you may have a problem with your key. If the key is excessively worn it will not be able to unlock the ignition cylinder so you can turn the key. I would ask for help from one...

New chevy 350 tbi idle rough shooting oil through valve breather hose into the throttle body

Claimed by Kevin Gainer

At green light, accelerated, engine revved, but car barely moved

Hello. It sounds like that there was a glitch inside the TCM, known as the transmission control module. There is a TCM update available for your vehicle. Call your dealership to see if the update has been done already or...

Related articles

Understanding Chevrolet Oil-Life Monitor (OLM) System and Lights
Car symbols, or dashboard lights, are a car service reminder. The Chevrolet Oil Light Monitor system indicates when and what service your car needs.
The Best Used Cars to Buy If You’re an Electrician
As As an electrician, you have to haul around wiring, tools and equipment, and tons of supplies. You can’t get by with a small used car, or even a big one. What you probably need is a good used cargo...
The Best Used Cars to Buy If You Don’t Have Kids
Buying Buying a used car is rarely a simple process, but if you don’t have kids, you have many more options than those who have to account for additional passengers. There are plenty of choices out there, depending on your...