There is a TSB that covers this problem for 91-92 models. I don't see why it would be any different for yours. You may not find the appropriate kit, but i'm sure something could be fabed to fit.
Bulletin No.
T-92-125
File in Group
10
Number
270
Corp. Ref. No.
101605R
Date
August, 1992
SUBJECT:
DRIVER'S SEAT CANNOT BE ADJUSTED HIGH ENOUGH (CORRECTION KIT)
MODELS AFFECTED:
1991-1992 DE VILLES AND FLEETWOODS
Some 1991-1992 DeVilles and Fleetwoods may experience a condition where the seat may not have enough upward travel.
To repair this condition use the following procedure:
1. Remove the four hex-head bolts attaching the seat frame to the adjuster. On vehicles with the six-way power seat option, the adjuster must be in the full up position to remove these bolts.
2. Insert spacer from kit, P/N 12520796, between the seat frame and adjuster at all four bolt locations. Refer to Figure 1.
3. Coat threads of the new replacement bolts with thread sealant/adhesive, GM P/N 12345382, and attach the seat frame to the adjuster.
4. Torque the attaching bolts to 22-28 N-m (17 lbs.ft.).
Parts are currently available from GMSPO.
For warranty purposes use Labor Operations T5310 for left and T5311 for right at .8 hour each.
Bulletin No.
T-92-125
File in Group
10
Number
270
Corp. Ref. No.
101605R
Date
August, 1992
SUBJECT:
DRIVER'S SEAT CANNOT BE ADJUSTED HIGH ENOUGH (CORRECTION KIT)
MODELS AFFECTED:
1991-1992 DE VILLES AND FLEETWOODS
Some 1991-1992 DeVilles and Fleetwoods may experience a condition where the seat may not have enough upward travel.
To repair this condition use the following procedure:
1. Remove the four hex-head bolts attaching the seat frame to the adjuster. On vehicles with the six-way power seat option, the adjuster must be in the full up position to remove these bolts.
2. Insert spacer from kit, P/N 12520796, between the seat frame and adjuster at all four bolt locations. Refer to Figure 1.
3. Coat threads of the new replacement bolts with thread sealant/adhesive, GM P/N 12345382, and attach the seat frame to the adjuster.
4. Torque the attaching bolts to 22-28 N-m (17 lbs.ft.).
Parts are currently available from GMSPO.
For warranty purposes use Labor Operations T5310 for left and T5311 for right at .8 hour each.
