Out of curiosity, how much did this cost you?
How to Install a GM Spec'd Spare Tire in the ECO MT Trunk
OK - I finally did it. I purchased all the parts and installed a spare tire my ECO MT's trunk. The hardest part is actually figuring out the parts needed, so I'll start there.
Required Parts
There are two different trunk floors. I chose the floor with the sound insulation. The non-sound insulating floor is about $20 less. I don’t have the part number for the non-sound insulating floor.
Optional Parts
Tools Needed
½ Inch Socket Wrench
Regular Pliers
Steps
Mount and balance the Compact Spare Tire onto the Wheel (13259230). Inflate to 55 PSI.
![Vehicle Car Trunk]()
Remove old trunk floor.
![Technology Auto part Subcompact car Vehicle Family car]()
Remove the air pump and its Styrofoam holder.
Using the ½ inch socket, remove the hex bolt holding the air pump strap to the trunk floor.
![Rim Auto part Automotive tire Wheel Tire]()
Screw the Bolt (13263725) into the floor where the hex bolt came out. Use your pliers to tighten.
![Ceiling]()
Lay the Floor Insulator (22783829) in the bottom of the trunk; black side up and flat edge to the back of the car.
Place the Wheel Support (13273001) in place.
![Auto part Automotive tire Circle Wheel Metal]()
Push the Jack Holder down on the bolt, lining it up with the Wheel Support
Adjust the Jack (13505394) to fit the Jack Holder. When you get the Jack it will be flat, so be careful to thread the jack screw into the hole in the side of the jack.
Place Jack into Jack Holder. It will only go one way.
Lay the Jack Handle (13255680) across the Jack.
![Auto part Automotive tire Tire]()
Put the mounted wheel & tire onto the entire stack.
![Tire Auto part Automotive tire Wheel Automotive wheel system]()
Put the Lug Nut/Jack Wrench (13348506) and Car Blocks (15116183) into the Wrench & Car Block Bag (20986100).
The Wrench & Car Block Bag has a strap with a grommeted hole at the end. Put this hole over the center supporting bolt.
Screw the Hand Nut (90126756) on the top of the bolt. Hand tighten.
![Bumper]()
![Auto part Vehicle Tire Rim Automotive tire]()
Lay the new Trunk Floor (95975191) in the trunk.
![Vehicle Car Trunk Family car]()
Put your Air Pump back into the trunk.
I had you inflate the spare tire to 55 PSI instead of 60 PSI. This will keep the tire mounted on the wheel while allowing for temperature based pressure changes while stored. If you need to use your spare, you’ll need the air pump to inflate it to 60 PSI before driving on.
I had my dealership mount & balance the spare as well as inflate with Nitrogen. Assuming the dealership’s Nitrogen pump is working properly, this eliminates the single biggest source of interior wheel corrosion, water vapor.
I'm not sure what the jack handle is used for except to position the jack underneath the car. The jack lift points on the Cruze are about 6 inches in front of the rear tires and 6 inches behind the front tires on the underbody frame. There is a notch in the jack head that fits into a notch on the car.
Required Parts
| Compact Spare Tire | T115/70R16; Sold by Maxxis International. GM does not sell this item and the GM Parts listing refers you to Maxxis. |
| Wheel | GM Part #13259230 |
| Jack | GM Part #13505394 |
| Wheel Support | GM Part #13273001 |
| Jack Holder | GM Part #13373497 |
| Lug Nut/Jack Wrench | GM Part #13348506 |
| Hand Nut | GM Part #90126756 |
| Bolt | GM Part #13263725 |
| Trunk Floor | GM Part #95975191 |
There are two different trunk floors. I chose the floor with the sound insulation. The non-sound insulating floor is about $20 less. I don’t have the part number for the non-sound insulating floor.
Optional Parts
| Car Block | GM Part #15116183; These are sold singly, so you need to order 2. |
| Wrench & Car Block Bag | GM Part #20986100 |
| Jack Handle | GM Part #13255680 |
| Floor Insulator | GM Part #22783829 |
Tools Needed
½ Inch Socket Wrench
Regular Pliers
Steps
Mount and balance the Compact Spare Tire onto the Wheel (13259230). Inflate to 55 PSI.
Remove old trunk floor.
Remove the air pump and its Styrofoam holder.
Using the ½ inch socket, remove the hex bolt holding the air pump strap to the trunk floor.
Screw the Bolt (13263725) into the floor where the hex bolt came out. Use your pliers to tighten.
Lay the Floor Insulator (22783829) in the bottom of the trunk; black side up and flat edge to the back of the car.
Place the Wheel Support (13273001) in place.
Push the Jack Holder down on the bolt, lining it up with the Wheel Support
Adjust the Jack (13505394) to fit the Jack Holder. When you get the Jack it will be flat, so be careful to thread the jack screw into the hole in the side of the jack.
Place Jack into Jack Holder. It will only go one way.
Lay the Jack Handle (13255680) across the Jack.
Put the mounted wheel & tire onto the entire stack.
Put the Lug Nut/Jack Wrench (13348506) and Car Blocks (15116183) into the Wrench & Car Block Bag (20986100).
The Wrench & Car Block Bag has a strap with a grommeted hole at the end. Put this hole over the center supporting bolt.
Screw the Hand Nut (90126756) on the top of the bolt. Hand tighten.
Lay the new Trunk Floor (95975191) in the trunk.
Put your Air Pump back into the trunk.
I had you inflate the spare tire to 55 PSI instead of 60 PSI. This will keep the tire mounted on the wheel while allowing for temperature based pressure changes while stored. If you need to use your spare, you’ll need the air pump to inflate it to 60 PSI before driving on.
I had my dealership mount & balance the spare as well as inflate with Nitrogen. Assuming the dealership’s Nitrogen pump is working properly, this eliminates the single biggest source of interior wheel corrosion, water vapor.
I'm not sure what the jack handle is used for except to position the jack underneath the car. The jack lift points on the Cruze are about 6 inches in front of the rear tires and 6 inches behind the front tires on the underbody frame. There is a notch in the jack head that fits into a notch on the car.
