GM Buick/Oldsmobile/Pontiac/Full-Size 1975-1990 Repair Guide

Trunk Lid



See Figure 1

  1. Raise the trunk lid. Cover the fenders with some sort of protective pads. This is necessary to protect the paint because the trunk lid will often contact these areas during removal or installation procedures.
  3. On models equipped with an underhood light disconnect the lamp wiring.
  5. Very precisely use a sharp scribe to mark the relationship between the trunk lid and the hinges so that you can remount it without the need to adjust it.
  7. Support the trunk lid, especially at the rear, in a secure manner. Remove the bolts on either side that fasten the sides of the hinges to the underside of the trunk lid. Remove the bolts starting at the rear and moving toward the front to help avoid placing stress on the assembly. Make sure the trunk lid is securely supported to help prevent bending of it as you work.
  9. When all the bolts are removed, lift the rear of the trunk lid off the hinges and then lift the unit off the vehicle.

To install:
  1. Carry the trunk lid from either side and position it over the luggage compartment in its normal position. Raise the rear and position it at the right angle to the upper surfaces of the hinges. Pass all the bolts through the trunk lid and start them into the side of the upper hinges. Do not tighten them, but leave plenty of clearance to adjust the position of the trunk lid on the hinges.
  3. Carefully shift the trunk lid on both hinges simultaneously to align the matchmarks. Then, tighten the mounting bolts, torquing to 20 ft. lbs. (27 Nm). Close the trunk lid and check its fit in the body and the alignment of the trunk lid latch. If necessary, readjust the alignment. Reconnect the underhood light wiring, if the vehicle is so equipped.

Click image to see an enlarged view

Fig. Fig. 1: Trunk lid mounting


All adjustments (fore and aft and up and down) are made by loosening the hinge strap-to-lid attaching bolts. Loosen all the bolts before adjusting the position of the lid to avoid springing it and to make adjustment easier. Slide the hood back and forth, locating both sides as required; then tighten the bolts. No side-to-side adjustment is provided.

If the hood has adjustable rear bumpers and it does not sit level, loosen the locknuts and turn the bumper screws up or down as necessary. Retighten the locknuts. You may find it helpful to close the trunk lid and measure the gap between the hood and body with a finely calibrated ruler.