My $0.02 on changing the Motor Mounts on my 04 4WD EXT
First, this forum is priceless, thanks to everyone for sharing their knowledge.
Second, the vibration was so bad that I would shift in to Neutral when coming to a stop to avoid the shakes.
Locally mounts were $109 or $136 each depending on the dealer plus tax. I ordered from GM Parts Direct for $65 each and $37 FedEx next day (ordered Thursday AM got em Friday AM). $167 even versus $218 + tax plus and a 90min round trip drive…
This took 4 hours from the time I turned the stereo on to the time I turned it off.
1) Block the rears, Jack up the front end, & remove the front tires.
2) Disconnect battery
3) Remove the air filter and intake plumbing
4) Remove the ECU (Driver’s side)
5) Remove Fan Shroud Bolts
6) Remove the oil pan skid plate
7) Loosen the top and bottom nuts on the driver’s side Motor Mount (for this I used a ½” drive 18mm socket with a knuckle, a long wobble extension, and a short standard extension)
8) Remove the top and bottom nuts from the passenger side motor mount
9) Using a section of 4x4 and my floor jack I raised the engine until the front half axel CV joint touched the frame
10) Loosened the Motor Mount Bracket for extra wiggle room. You’ll need a 13/16” combo wrench as the bolt are behind or very close to being behind the strut spring
11) Passenger side mount came right out.
12) Removed (dremel with cutting wheel) the top portion of the top stud on the new mount which gives an extra ¼” of play
13) Passenger side mount went in bottom first, then I used a pry bar and a rubber mallet to persuade the top stud it in the rest of the way, however, the method I sued on the driver’s side mount would have been just as easy if not easier.
14) Install top and bottom nuts and tighten up the bracket
15) Lower engine and tighten bracket all the way
16) Remove top and bottom nuts on driver side
17) Jack up engine
18) Loosen the motor mount bracket
19) Bust you knuckles trying to remove it, swear a lot. This side sucks so much worse than the passenger side.
20) I finally decided to use a bottle jack, a 4x4, and my pry bar placed against the bottom on the old motor mount to force it up and out of the bottom bracket. This worked amazing well!!!
21) Cut the top stud on the new mount.
22) Install the top stud first and placed the nut on loosely to make sure the mount doesn’t fall out.
23) Back to the bottle jack, 4x4, and pry bar. Place the pry bar against the metal bottom of the new mount and use the jack to compress it until the bottom stud slides on to the bracket. I use the 4x4 between the jack and pry bar.
24) I then threaded a rope through the frame and around the bottom stud of the mount so I could gently pull it in to place, and it fell right in to the mounting hole.
25) Add bottom nut
26) Tighten up the Bracket.
27) I then when back to all 4 motor mount nuts and removed them and added blue lock tight, then replaced them and torque them down.
28) Reassemble everything and OMG this thing runs like a DREAM!!! Smooth as Silk!