Hi, and welcome.

Here is a NAPA WS1063 Windshield Wiper Switch.

New, very old stock.

NAPA wants $80 for this.

Fitment, per Napa website:

Make Model Year(s)

Chevrolet Blazer S10 2WD 1983 -1993

Chevrolet LLV (U.S.P.S) 1987 -1995

Chevrolet Blazer T10 4WD 1983 -1993

Chevrolet Astro Van 1985 -1990

Chevrolet S10 - Pickup 1982 -1993

Chevrolet C3500HD 1 Ton Truck 1991 -1991

Chevrolet C3500 1 Ton - Pickup 1991 -1991

Chevrolet C2500 3/4 Ton - Pickup 1991 -1991

Chevrolet K3500 1 Ton 4WD - Pickup 1991 -1991

Chevrolet C1500 1/2 Ton - Pickup 1991 -1991

Chevrolet K2500 3/4 Ton 4WD - Pickup 1991 -1991

Chevrolet K1500 1/2 Ton 4WD - Pickup 1991 -1991

GMC Jimmy S15 2WD 1983 -1991

GMC Jimmy T15 4WD 1983 -1991

GMC S15 - Pickup 1982 -1990

GMC Safari Van 1985 -1990

GMC K3500 1 Ton 4WD - Pickup 1991 -1991

GMC K2500 3/4 Ton 4WD - Pickup 1991 -1991

GMC Sonoma 1991 -1993

GMC Jimmy K1500 1/2 Ton 4WD 1985 -1986

GMC K1500 1/2 Ton 4WD - Pickup 1991 -1991

GMC C3500 1 Ton - Pickup 1991 -1991

GMC C3500HD 1 Ton Truck 1991 -1991

GMC C1500 1/2 Ton - Pickup 1991 -1991

GMC C2500 3/4 Ton - Pickup 1991 -1991

Oldsmobile Bravada 1991 -1993

Thanks!