The 12 Hours of Sebring Grand Prix of Endurance, was the third round of the 1989 IMSA GT Championship and was held at the Sebring International Raceway, on March 18, 1989. Victory overall went to the No. 83 Electramotive Engineering Nissan GTP ZX-Turbo driven by Chip Robinson, Geoff Brabham, and Arie Luyendyk.^[1][2]

Class winners in bold.

Pos	Class	No	Team	Drivers	Chassis	Tyre	Laps
					Engine
1	GTP	83	Electramotive Engineering	Chip Robinson Geoff Brabham Arie Luyendyk	Nissan GTP ZX-Turbo	G	330
					Nissan 3.0L V6 Turbo
2	GTP	61	Castrol Jaguar Racing	John Nielsen Price Cobb	Jaguar XJR-9	D	328
					Jaguar 6.0L V12 N/A
3	GTP	86	Bayside Racing/Bruce Leven	James Weaver Dominic Dobson	Porsche 962	G	320
					Porsche 3.0L Flat 6 Turbo
4	GTP	30	Momo/Gebhardt Racing	Giampiero Moretti Massimo Sigala Michael Roe Derek Bell	Porsche 962	G	317
					Porsche 3.0L Flat 6 Turbo
5	GTP	0	Joest Racing	Frank Jelinski Jean-Louis Ricci Bob Wollek	Porsche 962	G	315
					Porsche 3.0L Flat 6 Turbo
6	GTP	10	Hotchkis Racing	Jim Adams John Hotchkis John Hotchkis Jr.	Porsche 962	G	300
					Porsche 3.0L Flat 6 Turbo
7	Lights	55	Huffaker Racing	Bob Lesnett Dan Marvin	Spice SE86CL	F	292
					Pontiac 3.0L I4 N/A
8	GTO	11	Roush Racing	Wally Dallenbach Jr. Dorsey Schroeder	Mercury Cougar XR-7	G	292
					Ford 6.0L V8 N/A
9	Lights	9	Essex Racing	Charles Morgan Tom Hessert	Spice SE88P	G	290
					Buick 3.0L V6 N/A
10	GTO	16	Roush Racing	Pete Halsmer Bob Earl	Mercury Cougar XR-7	G	288
					Ford 6.0L V8 N/A
11	GTP	33	Spice Engineering USA	Costas Los Jeff Kline	Spice SE89P	G	285
					Pontiac 5.0L V8 N/A
12	GTO	38	Mandeville Auto Tech	Roger Mandeville Kelly Marsh	Mazda RX-7	Y	284
					Mazda 1.9L 3 Rotor
13	GTO	90	Road Circuit Technology	Les Delano Andy Petery Craig Carter	Mercury Capri	G	282
					Ford 6.0L V8 N/A
14	GTP	60	Castrol Jaguar Racing	Davy Jones Jan Lammers	Jaguar XJR-9	D	281
					Jaguar 6.0L V12 N/A
15	GTU	74	Huffaker Racing	George Robinson Bart Kendall Johnny Unser	Pontiac Fiero	F	278
					Pontiac 3.0L I4 N/A
16	GTU	82	Dick Greer Racing	Dick Greer Mike Mees John Finger	Mazda RX-7	Y	273
					Mazda 1.3L Rotary
17	GTU	71	Team Highball	Amos Johnson Dennis Shaw Paul Lewis	Mazda RX-7	Y	272
					Mazda 1.3L Rotary
18	Lights	19	Essex Racing	Reggie Smith Michael Dow Monte Shalett	Tiga GT288	G	270
					Buick 3.0L V6 N/A
19	GTU	89	901 Racing	Peter Uria Jack Refenning Freddy Baker	Porsche 911 Carrera RSR	F	268
					Porsche 3.2L Flat 6 N/A
20 DNF	GTP	09	Ball Bros. Racing	Steve Durst Mike Brockman Jay Cochran	Spice SE88P	G	263
					Buick 4.5L V6 N/A
21	Lights	43	John Higgins	Charles Monk Lorenzo Lamas John Higgins Chip Mead	Fabcar CL	G	254
					Porsche 3.0L Flat 6 N/A
22	GTU	72	Jay Kjoller	Jay Kjoller Patrick Mooney Steve Volk	Porsche 911	F	248
					Porsche 3.2L Flat 6 N/A
23	GTO	03	Skoal Bandit Racing	Max Jones Buz McCall	Chevrolet Camaro	G	246
					Chevrolet 5.5L V8 N/A
24	Lights	63	Downing/Atlanta	Jim Downing John O'Steen Howard Katz	Argo JM19	G	246
					Mazda 1.3L 2 Rotor
25	Lights	4	S&L Racing	Scott Schubot Tom Blackaller Linda Ludemann	Spice SE88P	G	245
					Buick 3.0L V6 N/A
26	GTU	57	Kryderacing	Reed Kryder John Gimble Frank del Vecchio	Nissan 300ZX	G	245
					Nissan 2.8L V6 N/A
27	GTO	18	Ken Bupp	Ken Bupp Robert Peters	Chevrolet Camaro	G	244
					Chevrolet 5.0L V8 N/A
28	GTU	87	Overton Autosport	Lance Stewart Ron Cortez	Mazda RX-7	F	243
					Mazda 1.3L Rotary
29	GTU	95	Leitzinger Racing	Bob Leitzinger Butch Leitzinger Chuck Kurtz	Nissan 240SX	T	228
					Nissan 3.0L V6 N/A
30	GTU	62	Alex Job Racing	Alex Job Chris Kraft Rusty Bond	Porsche 911	G	225
					Porsche 3.2L Flat 6 N/A
31	Lights	12	Carlos Bobeda Racing	Tomas Lopez Albert Rocca Carlos Bobeda	Tiga GT286	G	225
					Mazda 1.3L Rotary
32	GTU	17	Al Bacon Perf	Al Bacon Bob Reed	Mazda RX-7	F	216
					Mazda 1.3L Rotary
33 DNF	GTO	75	Cunningham Racing	John Morton Steve Millen	Nissan 300ZX Turbo	G	215
					Nissan 3.0L I6 N/A
34 DNF	Lights	40	Bieri Racing	Martino Finotto Paolo Guatamacchia Uli Bieri	Tiga GT286	G	193
					Ferrari 3.0L V8 N/A
35	GTO	47	Lion Rampant Racing	Ferdinand de Lesseps Luis Sereix Chaunce Wallace Hervé Regout	Chevrolet Camaro	G	189
					Chevrolet 5.0L V8 N/A
36 DNF	GTU	48	Red Line Racing	Mike Graham Dave Russell Alan Crouch	BMW 325i	F	187
					BMW 3.4L I6 N/A
37 DNF	GTP	67	Busby Racing	Bob Wollek Derek Bell John Andretti	Porsche 962	BF	184
					Porsche 3.0L Flat 6 Turbo
38 DNF	GTO	44	Thomas Sapp	Tim Morgan Marcus Opie Peter Morgan Charles Bair	Chevrolet Corvette C4	G	171
					Chevrolet 5.0L V8 N/A
39 DNF	GTP	98	All American Racers	Chris Cord Steve Bren Drake Olson	Toyota 88C	G	149
					Toyota 2.1L I4 Turbo
40 DNF	GTO	53	Bill McDill	Richard McDill Bill McDill	Chevrolet Camaro	G	146
					Chevrolet 6.0L V8 N/A
41 DNF	GTU	22	Guy Church	Guy Church E. J. Generotti Louis D'Agostino	Mazda RX-7	H	141
					Mazda 1.3L Rotary
42 DNF	Lights	25	Brent O'Neill	Brent O'Neill Steve Shelton Don Courtney	Argo JM19	G	137
					Buick 3.0L V6 N/A
43 DNF	GTO	2	Powell Equipment	John Jones Hunter Jones Richard Andison	Chevrolet Corvette	G	116
					Chevrolet 5.5L V8 N/A
44 DNF	GTU	50	Fritz Hochreuter	Rudy Bartling Rainer Brezinka Fritz Hochreuter	Porsche 911	G	115
					Porsche 3.0L Flat 6 N/A
45 DNF	GTU	68	Luis Mendez	Luis Mendez Mandy Gonzalez Tato Ferrer	Porsche 911 Carrera RSR	G	101
					Porsche 3.5L Flat 6 N/A
46 DNF	GTU	45	Charles Slater	Charles Slater Kenneth Brady Norm Dupont	Porsche 911	G	93
					Porsche 3.2L Flat 6 N/A
47 DNF	GTO	05	Ken Hendrick Racing	Ken Hendrick Dan Gallant	Oldsmobile Toronado	G	90
					Buick 4.5L V6 N/A
48 DNF	GTU	7	Juan Carlos Negron	Juan Negron Chiqui Soldevilla Luis Gordillo	Mazda RX-7	B	72
					Mazda 1.3L Rotary
49 DNF	GTO	42	Bob Speed Products	Del Russo Taylor Mark Montgomery	Pontiac Firebird	G	58
					Pontiac 6.0L V8 N/A
50 DNF	GTO	46	Team Gulfwind	Daniel Urrutia Gene Whipp Gary Smith	Chevrolet Camaro	G	20
					Chevrolet 5.7L V8 N/A
51 DNF	Lights	58	Gary Wonzer Racing	Bill Bean Nort Northam Gary Wonzer Bruce Westcott	Lola T616	H	19
					Mazda 1.3L 2 Rotor
52 DNF	GTP	84	Electramotive Engineering	Arie Luyendyk Chip Robinson Geoff Brabham	Nissan GTP ZX-Turbo	G	14
					Nissan 3.0L V6 Turbo
53	GTP	39	Phoenix Race Cars	John Gunn Chip Mead Gary Belcher	Phoenix JG2	G	10
					Chevrolet 5.0L V8 N/A
DNS	GTP	99	All American Racers	Willy T. Ribbs Juan Manuel Fangio II	Eagle HF89	G	0
					Toyota 2.1L I4 Turbo
DNS	GTU	00	Full Time Racing	Kal Showket Neil Hanneman	Dodge Daytona	Y	0
					Dodge I4 N/A
DNS	GTO	23	Raul Garcia	Raul Garcia	Pontiac Firebird	?	0
					?
Source:[3]