GM Seat Jacker Installation Instructions 2019+GM 1500 / 2020+ GM 2500 / 3500 / 2021+ Chevy Suburban / Tahoe / Blazer / Trax / Hummer / Acadia — Install Guide

Important Notes

• To help prevent cross-threading, verify all bolts and threads before installation by threading the applicable bolt into the corresponding hole by hand. Do not force any bolt that does not thread smoothly.
• Seat Jackers are sloped. The larger side must face forward.
• If installing Seat Jackers on both the front and rear of the seat, make sure the notch faces under the seat.
• Rear Seat Jacker installation follows the same steps as the front, in reverse.
• If installing the optional MMP, it attaches directly to the front of the Seat Jacker blocks using the threaded holes.

• Step 1 — Remove Trim (If Applicable) and Front Bolts

  1. Remove any plastic trim around the feet of the seat.
  2. Remove both front factory seat base bolts.
  3. Loosen the two rear seat bolts, but do not remove them.

• Step 2 — Lift the Seat

  Lift the front of the seat by either:

  1. Pushing backward on the headrest, or
  2. Having a helper pull the seat backward from the rear seat area.

• Step 3 — Choose Your Lift Height

  1/2" Lift — One Seat Jacker Shim

  1. Select the Seat Jacker shim with the threaded hole and “Seat Jackers” engraving.
  2. Place one Seat Jacker under each front seat rail, between the rail and the carpet.
  3. Make sure the larger side faces forward.
  4. The threaded hole at the front of the Seat Jacker is for the optional MMP.

  Continue to Step 4.

  1" Lift — Two Seat Jacker Shims

  1. Stack the two Seat Jacker shims together. The shims are notched and designed to nest together.
  2. Place the stacked Seat Jackers between the front seat rail and the carpet.
  3. The shim with “Seat Jackers” engraved on it goes on top.
  4. Make sure the larger side faces forward.

  Continue to Step 4.

• Step 4 — Install the Front Bolts

  Using the provided M10 1.5 x 60mm Cap Head Bolts and washers:

  1. Thread the bolt through the seat rail.
  2. Continue through the Seat Jacker(s) and into the vehicle floor.
  3. Start the bolt by hand to ensure it is properly aligned.

  IMPORTANT — SEAT RAIL ALIGNMENT
  If the seat rail holes do not line up:

  1. Lift the seat approximately 1/4".
  2. Start the bolt by hand and thread it a couple of turns.
  3. If needed, adjust the seat rails one at a time until everything lines up.
  4. Make sure the rear seat bolts are loose enough to allow the seat to move into alignment.

  Do not force the bolt or cross-thread the hardware.

• Step 5 — Torque the Seat Bolts

  Once all hardware is properly installed and aligned:

  1. Torque the two front bolts to 30 ft-lbs.
  2. Torque the two rear bolts to 30 ft-lbs.

• Step 6 — Reinstall Trim (If Applicable)

  Reinstall any plastic trim pieces removed in Step 1.

Final Check

Before operating the vehicle, verify that:

• All four seat mounting bolts are properly torqued.
• The Seat Jackers are properly seated.
• The larger side of the Seat Jackers faces forward.
• The seat is securely mounted.

 - Check bolt torque at regular intervals and don’t forget to post a review. - Desertdoesit.com