So, a couple of weeks ago our 2007 GMC Envoy had a flat tire. This in itself was no big deal but the problem was that I could not get the spare tire to lower from the spare tire mount underneath the truck. No matter how much I jiggled the tire and kept trying to pry it down I could not get the latch to release. Finding this to be a pretty big issue for future travels I decided to replace the spare tire mount. This is how I did it.
I purchased the Dorman Spare Tire Carrier.
First you have to flip up the rear seat bottoms to expose all of the tools that you will need to get this job done. What you need these tools for is for when you get the new parts in; these tools will allow you to pull the tire up into its home when the new part is in. You will also use them to loosen the existing parts so that you can get the old part out.
Flip the seats up to expose the tire changing tools
Use one of the extension bars to insert into the access port (We were at the beach!)
Getting the old part out is the hardest part of this job since the tire is in the way because it won’t come down. There is a little latch that is hooked on the mount that is stuck and is what is causing the tire not to come down. I attempted to cut the wire with a pair of tin snips but that did not get me anywhere.
That’s where I attempted to cut the wire.
What I eventually decided to do was to just unbolt the entire unit from underneath the truck and lower the tire carefully down to the ground. I was lying underneath the tire so I went for the crank section first.
All the bolts were 15MM and there were two bolts that were holding the crank section of the assembly. I unbolted these first.
These were the two bolts on the crank
I then pulled the tire down as far as I could and got the single bolt un-bolted from the chassis. I expected the tire to just fall down at this point but it did not due to a small lip that slides into a groove in the chassis.
The single bolt for the mount portion.
At this point I slid myself underneath the tire and kind of used my body as a jack stand under the tire. I was then able to maneuver the lip out of the groove and allow the tire to come loose. This was a very gingerly procedure since I did not want to get injured and I was lying underneath the tire.
The new part was a direct replacement for the old one. It was slightly redesigned with rust prohibitive coatings which should help prevent this issue from happening again. To put it back together, bolt up the crank section using the bolts that you took out earlier.
The new Crank portion bolted up
Then bolt up the hanging section by sliding the lip portion into its groove and bolting up the hanger with the single bolt you took out earlier.
You can see the bolt hole and the slot for the lip on the mount.
Mount portion mounted
Now you will lower the tire mount down using the tools obtained from underneath the seat and slide the mount through the middle of the tire and put the tire in its place.