The EGR solenoid is the same on the following vehicles:
89 TTA
1986 Only:
Buick Park Ave,LeSabre,Riviera,Century 3.8 VIN Codes "B" & "3"
Olds 98 Regency,88 Delta,Toronado,Ciera 3.8 VIN Codes "B" &"3"
1986-1988
Pontiac Grand Am 3.0 VIN Code "L"
Olds Calais 3.0 VIN Code "L"
Buick Somerset,Skylark 3.0 VIN Code"L"