I need an ESC module from an 87-89 tpi 350, it has to be a 350. It's that black box behind the MAF Power relay and should say HKR on it.

I got one from the junkyard for $4.

and if anyone is wondering, thy can be found on all of these vehicles

BUICK ROADMASTER (1992 - 1993)
BUICK ROADMASTER LIMITED (1992 - 1993)
CADILLAC FLEETWOOD 1992
CHEVROLET BLAZER (1987 - 1994)
CHEVROLET C1500 PICKUP (1988 - 1995)
CHEVROLET C1500 SUBURBAN (1992 - 1995)
CHEVROLET C2500 PICKUP (1988 - 1995)
CHEVROLET C2500 SUBURBAN (1992 - 1995)
CHEVROLET C3500 PICKUP (1988 - 1995)
CHEVROLET CAMARO (1987 - 1989)
CHEVROLET CAPRICE (1990 - 1991)
CHEVROLET CAPRICE CLASSIC 1991
CHEVROLET CAPRICE CLASSIC LTZ 1991
CHEVROLET CORVETTE (1987 - 1989)
CHEVROLET EL CAMINO 1987
CHEVROLET G10 SPORTVAN (1987 - 1992)
CHEVROLET G20 SPORTVAN (1987 - 1992)
CHEVROLET G20 VAN (1987 - 1992)
CHEVROLET G30 SPORTVAN (1987 - 1992)
CHEVROLET G30 VAN (1987 - 1992)
CHEVROLET K1500 PICKUP (1988 - 1995)
CHEVROLET K1500 SUBURBAN (1992 - 1995)
CHEVROLET K2500 PICKUP (1988 - 1995)
CHEVROLET K2500 SUBURBAN (1992 - 1995)
CHEVROLET K3500 PICKUP (1988 - 1995)
CHEVROLET MONTE CARLO (1987 - 1988)
CHEVROLET R10 PICKUP 1987
CHEVROLET R10 SUBURBAN (1987 - 1988)
CHEVROLET R1500 SUBURBAN (1989 - 1991)
CHEVROLET R20 PICKUP (1987 - 1988)
CHEVROLET R20 SUBURBAN (1987 - 1988)
CHEVROLET R2500 SUBURBAN (1989 - 1991)
CHEVROLET R30 PICKUP (1987 - 1988)
CHEVROLET R3500 PICKUP (1989 - 1991)
CHEVROLET TAHOE 1995
CHEVROLET V10 PICKUP 1987
CHEVROLET V10 SUBURBAN (1987 - 1988)
CHEVROLET V1500 SUBURBAN (1989 - 1991)
CHEVROLET V20 PICKUP 1987
CHEVROLET V20 SUBURBAN (1987 - 1988)
CHEVROLET V2500 SUBURBAN (1989 - 1991)
CHEVROLET V30 PICKUP (1987 - 1988)
CHEVROLET V3500 PICKUP (1989 - 1991)
GMC C1500 PICKUP 1988
GMC C1500 PICKUP SIERRA (1989 - 1995)
GMC C1500 PICKUP SIERRA XC (1989 - 1995)
GMC C1500 SUBURBAN (1992 - 1995)
GMC C2500 PICKUP 1988
GMC C2500 PICKUP SIERRA (1989 - 1995)
GMC C2500 PICKUP SIERRA XC (1989 - 1995)
GMC C2500 SUBURBAN (1992 - 1995)
GMC C3500 PICKUP 1988
GMC C3500 PICKUP SIERRA (1989 - 1995)
GMC C3500 PICKUP SIERRA XC (1989 - 1995)
GMC G1500 VAN RALLY (1991 - 1992)
GMC G2500 VAN RALLY (1991 - 1992)
GMC G2500 VANDURA (1991 - 1992)
GMC G3500 VAN (1991 - 1992)
GMC G3500 VAN RALLY (1991 - 1992)
GMC G3500 VANDURA (1991 - 1992)
GMC JIMMY (1987 - 1991)
GMC K1500 PICKUP 1988
GMC K1500 PICKUP SIERRA (1989 - 1995)
GMC K1500 PICKUP SIERRA XC (1989 - 1995)
GMC K1500 SUBURBAN (1992 - 1995)
GMC K2500 PICKUP 1988
GMC K2500 PICKUP SIERRA (1989 - 1995)
GMC K2500 PICKUP SIERRA XC (1989 - 1995)
GMC K2500 SUBURBAN (1992 - 1995)
GMC K3500 PICKUP 1988
GMC K3500 PICKUP SIERRA (1989 - 1995)
GMC K3500 PICKUP SIERRA XC (1989 - 1995)
GMC R1500 PICKUP 1987
GMC R1500 SUBURBAN (1987 - 1991)
GMC R2500 PICKUP (1987 - 1989)
GMC R2500 SUBURBAN (1987 - 1991)
GMC R3500 PICKUP (1987 - 1991)
GMC V1500 PICKUP 1987
GMC V1500 SUBURBAN (1987 - 1991)
GMC V2500 PICKUP 1987
GMC V2500 SUBURBAN (1987 - 1991)
GMC V3500 PICKUP (1987 - 1991)
GMC YUKON (1992 - 1995)
OLDSMOBILE 98 REGENCY 1992
OLDSMOBILE 98 REGENCY ELITE 1992
OLDSMOBILE 98 REGENCY TOURING 1992
OLDSMOBILE CUSTOM CRUISER 1992
PONTIAC FIREBIRD (1987 - 1988)
PONTIAC FIREBIRD FORMULA 1989
PONTIAC FIREBIRD TRANS AM (1987 - 1989)
PONTIAC FIREBIRD TRANS AM GTA 1989