GM 15" Inch Wheel Cross Reference (FWD)
ET = Offset Go to: Vehicle Bolt Pattern Reference
H = High Positive Offset - FWD ( Front Wheel Drive ) Typically +45, 40, 35 offset
M = Medium Offset - RWD ( Rear Wheel Drive) Typically +20 offset
L = Low Offset - RWD ( Rear Wheel Drive ) Typically 0 offset
Still trying to determine what CB is?
MODEL	YEAR	OE SIZE	BOLT	LUG NUT	CB	ET
		Wheel Diameter and Width	How Many Lugs & How Far Apart	Lug Thread Size & Pitch
Oldsmobile
CUTLASS SUPREME (FWD)	88-97	15 X 6	5X115	12mmX1.5	70.3	H
88,98 DELTA,REGENCY,ROYALE (FWD)	86-96	15 X 6	5X115	12mmX1.5	70.3	H
LSS	97-on	15 X 6	5X115	12mmX1.5	70.3	H
TORONADO TROFEO	86-92	15 X 6	5X115	12mmX1.5	70.3	H
SILHOUETTE	90-on	15 X 6	5X115	12mmX1.5	70.3	H
INTRIGUE	97-on	15 X 6	5X115	12mmX1.5	70.3	H
REGENCY	97-on	15 X 6	5X115	12mmX1.5	70.3	H
Cadilac
ALLANTE	87-93	15 X 6	5X115	12mmX1.5	70.3	H
DEVILLE	85-on	15 X 6	5X115	12mmX1.5	70.3	H
SEDAN DEVILLE	93-on	15 X 6	5X115	12mmX1.5	70.3	H
Chevrolet
VENTURE ?? OFFSET?	97-	15 X 6	5X115	12mmX1.5	70.3	-
VENTURE	97-on	15 X 6	5x115	12mmX1.5	70.3	H
IMPALA	99- on	15 X 6	5X115	12mmX1.5	70.3	H
LUMINA	90-on	15 X 6	5X115	12mmX1.5	70.3	H
Pontiac
AZTEC	01-ON	15 X 6	5X115	12mmX1.5	70.3	H
GRAND PRIX	88-on	15 X 6	5X115	12mmX1.5	70.3	H
MONTANA	99-on	15 X 6	5X115	12mmX1.5	70.3	H
TRANS SPORT	90-97	15X6	5X115	12mmX1.5	70.3	H
Buick
REATTA	88-91	15 X 6	5X115	12mmX1.5	70.3	H
REGAL	88-96	15 X 6	5X115	12mmX1.5	70.3	H
REGAL T-TYPE	85-89	15 X 6	5X115	12mmX1.5	70.3	H
RIVIERA	93-96	15 X 6	5X115	12mmX1.5	70.3	H
RIVIERA (T-TYPE) NO FIT-!!	86-89	15 X 6	5X115	12mmX1.5	70.3	M
RENDEZVOUS	02-	15 X 6	5X115	12mmX1.5	70.3	H
LE SABRE	86-96	15 X 6	5X115	12mmX1.5	70.3	H
I made this list while trying to find OEM steel wheels for my 1992 Oldsmobile Delta 88 Royale.
I appears they did come with a 16 in wheel also.