Engine Firing Orders: 1991

Buick	Century	2.5 liter L4 VIN "R"
Buick	Century	3.3 liter V-6 VIN "N"
Buick	LeSabre	3.8 liter V-6 VIN "C"
Buick	Park Avenue	3.8 liter V-6 VIN "L"
Buick	Park Avenue Ultra	3.8 liter SC V-6 VIN "1"
Buick	Park Avenue Ultra	3.8 liter V-6 VIN "L"
Buick	Reatta	3.8 liter V-6 VIN "L"
Buick	Regal	3.1 liter V-6
Buick	Regal	3.8 liter V-6 VIN "L"
Buick	Riviera	3.8 liter V-6 VIN "L"
Buick	Roadmaster	5.0 liter V-8 VIN "E"
Buick	Roadmaster Estate Wagon	5.0 liter V-8 VIN "E"
Buick	Skylark	2.3 liter SOHC L4 VIN "D" Quad 4
Buick	Skylark	2.5 liter L4 VIN "R"
Buick	Skylark	3.3 liter V-6 VIN "N"

Additional Information provided courtesy of AllDATA