For 1990-2009 cars

# PASSENGER CAR ALIGNMENT SPECIFICATIONS

#### MODELS/YEARS: ALL 1987 GM PASSENGER CARS

Alignment specifications for all 1987 GM passenger can are being published in this bulletin due to some recent specifications changes. Many of the recent changes have been reductions in toe for improved tire wear. The chart attached replaces and supersedes the alignment specification chart printed in the November 1986 Service Guild.

Four-wheel alignment is recommended whenever rear suspension is adjustable. Four-wheel alignment equipment, such as in the GM Dealer Equipment Catalog, is recommended. Alignment equipment must be calibrated on a regular basis.

1987 GM PASSENGER CAR ALIGNMENT SPECIFICATIONS

#### Front Wheel Drive (FWD)

Caster Max.Cross Camber Max.Cross Caster Camber ------ ------ ------ ------ Century +1.7 DEG +/- 1 DEG 2 DEG 0 +/- .5 DEG 1 DEG Celebrity, Cutlass Ciera, 6000

LeSabre, +2.5 DEG +/- .5 DEG .75 DEG +.2 DEG +/-.5 DEG .75 DEG Electra, Delta 88, Ninety Eight, Bonneville Rear -.3 DEG +/-.5 DEG

Cad DeVille +2.5 DEG +/-.5 DEG .75 DEG (L - .5 DEG .75 DEG R + .5 DEG +/- .5 DEG Rear -.3 DEG +/-.5 DEG

Riviera +2.3 DEG +/- .1 DEG 1 DEG 0 +/-.8 DEG 1 DEG Rear -.7 DEG +/-.3 DEG

Toronado +2.3 DEG +/- 1 DEG 1 DEG 0 +/- .8 DEG 1 DEG Rear -.4 DEG +/-.3 DEG

Eldorado, Seville +2.3 DEG +/- 1 DEG 1 DEG 0 +/- .8 DEG 1 DEG Rear -.1 DEG +/-.3 DEG

Firenza, Calais +1.7 DEG +/- 1 DEG 1 DEG +.8 DEG +/-.6 DEG 1 DEG Skyhawk, Somerset Skylark, Cimarron Corsica, Baretta, Cavailer, J-2000

Cavalier Z-24, +1.7 DEG +/- 1 DEG 1 DEG +.8 DEG +/-.6 DEG 1 DEG J-2000, Cimarron with 60 series tires

Allante +2.8 DEG +/- .5 DEG 1 DEG 0 +/- .8 DEG 1.6 DEG Rear +.2 DEG +/-.3 DEG

Steering Thrust Total Toe Wheel Angle Angle --------- ----------- ----- Century 0 +/- .2 DEG +/- 5 DEG Celebrity, Cutlass Ciera, 6000

LeSabre, 0 +/- .2 DEG +/- 3 DEG Electra, Delta 88, Ninety Eight, Bonneville Rear +.1 DEG +/- .2 DEG 0 +/- .1 DEG

Cad DeVille 0 +/-.2 DEG +/- 3 DEG

Rear +.1 DEG +/-.2 DEG 0 +/- .1 DEG

Riviera 0 +/-.2 DEG +/- 2.5 DEG Rear +.2 DEG +/- .2 DEG 0 +/- .15 DEG

Toronado 0 +/-.2 DEG +/- 2.5 DEG Rear +.2 DEG +/- .2 DEG 0 +/- .15 DEG

Eldorado, Seville 0 +/-.2 DEG +/- 2.5 DEG Rear +.2 DEG +/- .2 DEG 0 +/- .15 DEG

Firenza, Calais 0 +/- .2 DEG +/- 5 DEG Skyhawk, Somerset Skylark, Cimarron Corsica, Baretta, Cavailer, J-2000

Cavalier Z-24, -.12 DEG +/- .2 DEG +/- 5 DEG J-2000, Cimarron with 60 series tires

Allante 0 +/- .2 DEG +/- 2.5 DEG Rear +.2 DEG +/- .2 DEG 0 +/- .15 DEG

#### Rear Wheel Drive (RWD)

Caster Max.Cross Camber Max.Cross Caster Camber ------ ------ ------ ------

Caprice, +2.8 DEG +/- 1 DEG 1 DEG +.8 DEG +/- .8 DEG 1 DEG Safari Wagon, Custom Cruiser Wgn, Estate Wagon

Cad.Brougham +3 DEG +/- 1 DEG 1 DEG + .3 DEG +/- .5 DEG 1 DEG

Camaro, +5 DEG +/- .5 DEG .8 DEG + 1 DEG +/- .5 DEG .7 DEG Firebird

Buick Regal, +2.8 DEG +/- 1 DEG 1 DEG +.5 DEG +/- .8 DEG 1 DEG Cutlass Supreme, Grand Prix, Monte Carlo, w/manual strg. +.8 DEG +/- 1 DEG 1 DEG +.5 DEG +/- .8 DEG 1 DEG

Chevette, +4.7 DEG +/- 2 DEG 2 DEG +.2 DEG +/- .7 DEG 1.4 DEG T-1000

Fiero + 5 DEG +/- 2 DEG 2 DEG +.5 DEG +/- .8 DEG 1.6 DEG Rear -1 DEG +/- .5 DEG

Corvette + 5.5 DEG +/- .8 DEG 1 DEG +.8 DEG +/- .5 DEG 1 DEG Rear +.4 DEG +/- .5 DEG

Steering Thrust Total Toe Wheel Angle Angle --------- ------------- -----

Caprice, +.1 DEG +/- .2 DEG +/- 2.5 DEG Safari Wagon, Custom Cruiser Wgn, Estate Wagon

Cad.Brougham +.1 DEG +/- .2 DEG +/- 5 DEG

Camaro, +.1 DEG +/- .2 DEG +/- 5 DEG Firebird

Buick Regal, +.1 DEG +/- .2 DEG +/- 5 DEG Cutlass Supreme, Grand Prix, Monte Carlo, w/manual strg. +.1 DEG +/- .2 DEG +/- 5 DEG

Chevette, +.12 DEG +/- .16 DEG +/- 5 DEG T-1000

Fiero 0 +/- .2 DEG +/- 5 DEG 0 +/- .15 DEG Rear 0 +/- .2 DEG

Corvette 0 +/- .2 DEG +/- 1 DEG 0 +/- .15 DEG Rear 0 +/- .2 DEG

Notes: All specifications, including toe, are in degrees. All toe specifications are total (sum) toe with appropriate steering wheel or thrust angle requirements. (Individual toe may be obtained by dividing total toe in half. Ex: .1 deg +/- .2 deg total toe = .05 deg +/- .1 deg individual toe). Positive toe is toe-in. Cross caster equals left caster minus right caster. Cross camber equals left camber minus right camber. Thrust angle is the angle between the path the rear wheel will take and the car's centerline.

1987 GM PASSENGER CAR ALIGNMENT SPECIFICATIONS

Front Wheel Drive (FWD)

Caster Max. Cross Camber Max.Cross Caster Camber ------ ------ ------ ------ Century, +1.7 DEG +/- 1 DEG 2 DEG 0 +/- .5 DEG 1 DEG Celebrity, Cutlass Ciera, 6000

LeSabre, +2.5 DEG +/- .5 DEG .75 DEG +.2 DEG +/- .5 DEG .75 DEG Electra, Delta 88, Ninety - Eight, Bonneville Rear -.3 DEG +/- .5 DEG

Cad DeVille +2.5 DEG +/- .5 DEG .75 DEG (L-.5 DEG .75 DEG R +.5 DEG +/- .5 DEG Rear -.3 DEG +/- .5 DEG

Riviera +2.3 DEG /-+ .1 DEG 1 DEG 0 +/- .8 DEG 1 DEG Rear -.7 DEG +/- .3 DEG

Toronado +2.3 DEG +/- 1 DEG 1 DEG 0 +/- .8 DEG 1 DEG Rear -.4 DEG +/- .3 DEG

Eldorado, +2.3 DEG +/- 1 DEG 1 DEG 0 +/- .8 DEG 1 DEG Seville -.1 DEG +/- .3 DEG Rear

Firenza, Calais,+1.7 DEG +/- 1 DEG 1 DEG +.8 DEG +/- .6 DEG 1 DEG Skyhawk,Sopmerset, Skylark,Cimarron Corsica, Baretta, Cavalier, J-2000

Cavalier Z-24, +1.7 DEG +/- 1 DEG 1 DEG +.8 DEG +/- .6 DEG 1 DEG J-2000,Cimarron with 60 series tires

Allante +2.8 DEG +/- .5 DEG 1 DEG 0 +/- .8 DEG 1.6 DEG Rear +.2 DEG +/- .3 DEG

Steering Thrust Total Toe Wheel Angle Angle --------- ----------- -----

Century, 0 +/- .2 DEG +/- 5 DEG Celebrity, Cutlass Ciera, 6000

LeSabre, 0 +/- .2 DEG +/- 3 DEG Electra, Delta 88, Ninety - Eight, Bonneville Rear +.1 DEG +/- .2 DEG 0 +/- .1 DEG

Cad DeVille 0 +/- .2 DEG +/- 3 DEG

Rear +.1 DEG +/- .2 DEG 0 +/- .1 DEG

Riviera 0 +/- .2 DEG +/- 2.5 DEG Rear +.2 DEG +/- .2 DEG 0 +/- .15 DEG

Toronado 0 +/- .2 DEG +/- 2.5 DEG Rear + .2 DEG +/- .2 DEG 0 +/- .15 DEG

Eldorado, 0 +/- .2 DEG +/- 2.5 DEG Seville Rear + .2 DEG +/- .2 DEG 0 +/- .15 DEG

Firenza, Calais, 0 +/- .2 DEG +/- 5 DEG Skyhawk,Sopmerset, Skylark,Cimarron Corsica, Baretta, Cavalier, J-2000

Cavalier Z-24, -.12 DEG +/- .2 DEG +/- 5 DEG J-2000,Cimarron with 60 series tires

Allante 0 +/- .2 DEG +/- 2.5 DEG Rear +.2 DEG +/- .2 DEG 0 +/- .15 DEG

Rear Wheel Drive (RWD)

Steering Thrust Total Toe Wheel Angle Angle ---------- ----------- ------ Caprice, +.1 DEG +/- .2 DEG +/- 2.5 DEG Safari Wagon, Custom Cruiser Wgn, Estate Wagon

Cad. Brougham +.1 +/- .2 DEG +/- 5 DEG

Camaro, + .1 DEG +/- .2 DEG +/- 5 DEG Firebird

Buick Regal, +.1 DEG +/- .2 DEG +/- 5 DEG Cutlass Supreme, Grand Prix, Monte Carlo, -w/manual strg. +.1 DEG +/- .2 DEG +/- 5 DEG

Chevette,T-1000 +.12 DEG +/- .16 DEG +/- 5 DEG

Fiero 0 +/- .2 DEG +/- 5 DEG Rear 0 +/- .2 DEG 0 +/- .15 DEG

Corvette 0 +/- .2 DEG +/- 1 DEG Rear 0 +/- .2 DEG 0 +/- .15 DEG

Notes: All specifications, including toe, are in degrees. All toe specifications are total (sum) toe with appropriate steering wheel or thrust angle requirements. (individual toe may be obtained by dividing total toe in half. Ex: .1 deg +/- .2 deg total toe = .05 deg +/- .1 deg individual toe). Positive toe is toe in. Cross caster equals left caster minus right caster. Cross camber equals left camber minus right camber. Thrust angle is the angle between the path the rear wheel will take and the car's centerline.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.