How to Start a Cadillac with a Dead Key Fob
Starting Your Cadillac
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Cadillac vehicles use two of GM‘s three different style keys and many different start procedures or locations. They are all here, and you can find a whole lot of videos here.
Here’s the deal: Buckle up, find your model, and if the main start battery is still good, we’ll get you underway.
CTS, XLR, ELR
The Cadillac Coupes show up early in this list: the CTS, XLR, and ELR. So, please note immediately that the latches are electronic and if the main 12-volt battery is dead and you’ve closed the door, the lever to the right is your only escape. You will find it below the door on the floor where you would expect to find a trunk release (right). Pull it up and the door will open. There’s another on the passenger side for that door.
With Style 1 (square) key fob, used in most GM vehicles prior to 2014, and in some Cadillac CTS Coupes and Sedans ongoing, place the transmitter in the transmitter pocket at the top and rear of the center console storage area with the buttons facing towards the front of the vehicle (right).
With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop button to start the vehicle as you would normally.
The XLR Coupe use either a small key fob that does not hold a mechanical key or the Style 1 fob. Regardless of the key fob type, the pocket for the transmitter (or fob) is on the left of the inside of the glove box. Place the transmitter in the pocket with the buttons facing the glove box storage area (right).
Again, with the vehicle in P (Park) or N (Neutral), press the brake pedal and the Start / Stop ignition button as normal.
SRX, CT5
In the Cadillac SRX, the transmitter pocket is located at the bottom of the console storage area (right). The new CT5 crossover uses this location as well, but using the Style 3 key fob. The spot may be beneath a storage tray, which must be lifted out, or at least beneath all the stuff that has gathered inside. Then insert the transmitter with the buttons facing up and with the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal.
ELR, CTS
The new key style, Style 3, was introduced in 2014. In the ELR Coupe and some CTS Sedans and Wagons (later models all use this location), locate the transmitter pocket on the shelf in the front of the console, as shown to the right. It is beneath a rubber that will need to be removed, and is the shape of the transmitter. Place the transmitter in the pocket, buttons facing up, and with the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal.
XTS
In the XTS sedan, the transmitter pocket is found in the front of the center console storage area. A storage tray may have to be lifted out. Place the transmitter in the pocket with the key ring up and the buttons facing out. See the image below. With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal. Check out the video here.
ATS
In ATS sedan, the transmitter pocket is located in the face of the front of the inside of the center console, similar to or as shown to the right. Slide the transmitter into the pocket with the key ring facing out and buttons up. With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal.
CT6
In the CT6 sedan, the transmitter pocket is located in the center console as well, but in the face of the back of the console, as shown to the right. Slide the transmitter into the pocket with the key ring up and buttons facing the front of the car. With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal.
XT4, Escalade
Cadillac now has new models and as has become all too common with General Motors, the back up locations are new and not reflective of any used 
previously in a Cadillac model. And the Escalade went along for the ride.
In the XT4 and the 2020 Escalade and Escalade ESV, the key fob is dropped into the front cup holder, as shown to the right. Make sure the cup holder is empty and that the fob’s buttons are facing up. With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal.
CT4, CT5, Lyriq
Meanwhile, the new CT4, CT5 and Lyriq EV models, for no apparently good reason, use the rear cup holder as the back up start location. Again, make sure the cup holder is empty and that the key fob’s buttons are facing up. With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal to start the vehicle.
XT5, XT6
In the XT5 and XT6 SUVs, clear away anything being stored in the center console. At the bottom near the back, there is a depression shaped like the Cadillac key fob. Set the fob down in the depression with the buttons facing up. With the vehicle in Park or Neutral, step on the brake pedal and press the Start / Stop ignition button as normal.
Escalade, pre 2020
The large SUV’s from GM, including the Escalade (prior to 2020), feature a transmitter 
pocket also located in the face of the front of the inside of the center console. However, the pocket points down, as shown to the right. The pocket in the Escalade is placed to the center and a bit lower. Slide the transmitter into the pocket with the key ring facing out, buttons forward (in a Suburban we had on hand, the engine started with the buttons facing either way). It is a loose fit, so don’t be concerned. With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal. Check out the video here.
Note: If you have made an attempt to start the vehicle without success, there may be residual pressure in the brake system and a new warning light may appear (left) or text 
message to Step on the Brake. Press the brake pedal very, very hard when trying to start the vehicle again to be sure that the release switch behind the pedal is engaged. Or wait a few minutes and try again.
… Return to Part I
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Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
These posts are for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
The author has 25 years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s College, ME: MS, Rensselaer Polytechnic Institute, NY
fob (remote control or ‘clicker’) styles, and two (GM Styles 1 and 3) have mechanical keys embedded inside. That key will be used to unlock the driver’s door or the trunk (yes, the trunk) and in some cases to remove a piece of the car!
The Style 3 key fob is similar to Style 1, in that the mechanical key is removed from the fob for use getting into the vehicle. To remove the mechanical key, press the button on the side of the transmitter near the key ring, as shown, and pull out the key.
CT4, CT6, CTS, XT4, XT5, XT6, XTS, ATS
key hole. The cylinder is hidden in the same place and manner, but the cap is the top, 1/8 of an inch portion. To remove it, the door handle must be pulled fully open. Then, push the cap towards the handle to release it. It may take a bit of force to accomplish this. See two videos 
Then in 2020, Cadillac came up with a whole new cap. As with the first style, there is a slot beneath the cap (right). The handle is first identified by its more curved appearance front to back and a separation near the top. Only the bottom can be removed. It is found on the Escalade and CT5.
cover frees. It will pop out about 1/8 of an inch. Remove the key – do not pry or pull with it. Once free, the cap simply swings up and can be pulled away (right).
The CTS, XLR and ELR Coupes have flush door handles (left image) with no key holes
at all. They have a very different trick up their sleeves.
We have two videos for coupes
Recall GM Coupes Before Someone Else Dies!
Yet another cringe worthy headline showed up on Twitter recently (September 2018). A man trapped in his car because the battery was dead. And for 14 hours. He was very, very lucky that the car wasn’t outside in the sun, or the outcome would have been very, very different.
This one hits home for us because of another incident several years ago that prompted this article on this site, but in this case, a man lost his life. So, all this needs a more thorough examination.
The problem is finding oneself locked in a car that has lost its power. It is a direct result of the move to all
electronic everything, right down to the door latches. It is also the result of very, very poor design.
Both of the incidents involve GM Coupes: a Chevrolet Corvette and a Cadillac XLR. They feature these flush door handles with a electronic button inside this opening that unlocks and opens the door if the key fob is present. If the power is lost when inside the car, the electronic button on the armrest no longer works, and while there is a back
up option, it is not remotely obvious and effectively not intuitive.
Where’s the Release?
The back up option is a mechanical release handle on the floor below the door, not on the door where any typical human would think to look. In the most recent episode, the owners manual was missing from the 12 year old XLR, which is all too common in older vehicles. And he didn’t have a cell phone with him, or he surely would have
been out of his car much sooner.
In the previous incident, the gentleman had gone to the car to check on his dog, leaving his cell phone behind. Relatives reported that there was evidence that the man was looking through the manual for help when he succumbed to the heat. He and dog passed away.
It is far too easy to blame the victim here. It is true that they were not familiar with the feature. Both cars were bought used, so expecting the seller to go over more obscure features is wishful thinking.
Age Again?
It is also way too easy to blame age — the men were 75 and 72, respectively. This is when I point to an incident relayed by 20 year olds. Their friend had bought a new BMW. He then let them in the car to check it out and locked the car from the outside.
The joke was that there was no way to unlock the doors from the
inside. I immediately pointed out that there IS a way out — just not where you would expect to look. The unlock button is placed in the middle of the dashboard, and the entire group was clearly unfamiliar with this quirk in a BMW. And it belongs exclusively to BMW.
Age is NOT the issue. Expectation and intuition is. Where did these 20-somethings look for an unlock button?
The Model X front doors are all mechanically released from the inside. Perfect.
The Model 3 has a mechanical handle exactly where you would hope. On the armrest pretty much where a hand would actually be while using the armrest. It was tempting to simply open the door with it each time. A superior design.
The last two examples are far better thought out. And before anyone else finds themselves trapped in a GM Coupe, irrespective of age, we think a new way to open the doors from the inside must be devised and the cars recalled.
In our last show, we talked about changing the behavior of the one vs the behavior of the millions. And this is yet another example.
Changing the one, the manufacturer, eliminates the need for millions drivers to read, and frankly memorize, crucial new features or the entire owner’s manual. It also eliminates the need for millions of salespeople to somehow suddenly become effective teachers. Someone else’s dad, mom, brother, sister, son, daughter, husband or wife should not have to die or nearly die over poorly thought out designs.
——————————————————————-
Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
These posts are for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
The author has 25 years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s College, ME: MS, Rensselaer Polytechnic Institute, NY