Notes: Production: 08/1988-, Front of Catalyst 4 wire

Notes: OE Style - Front of Catalyst - DLX & SR5 4 wire - flanged

Detailed Notes: Flange type, 4 wire

Notes: Production: 01/1988-, OE Style - Front of Catalyst - DLX & SR5 4 wire - flanged

Detailed Notes: Flange type, 4 wire

Notes: Production: 08/1988-, Rear of Catalyst - California

Notes: Production: 08/1988-, OE Style - Front of Catalyst - Federal 4 wire - flanged

Notes: Production: 08/1988-, OE Style Front of Catalyst California 4 wire

Notes: Production: 08/1988-, Front of Catalyst 4 wire

Notes: Production: 08/1988-, Rear of Catalyst - California - Regular Cab (RN101)

Notes: OE Style - 4-Wire - Rear of Catalyst - California & Short Bed Federal models did not use a rear O2 sensor for this time span.

Notes: Front of Catalyst

Notes: OE Style - Front of Catalyst 4 wire - flanged

Notes: OE Style - Front of Catalyst - Standard Models 4 wire - flanged

Notes: Production: 08/1988-, OE Style - Front of Catalyst - Federal 4 wire - flanged rear sensor before catalyst

Notes: Production: 08/1988-, OE Style - Front of Catalyst - Federal 4 wire - flanged Federal applications did not use a rear for this time span.

Notes: OE Style - 4-Wire - Rear of Catalyst - California & Long Bed Federal models did not use a rear O2 sensor for this time span.

Notes: Production: 08/1988-, OE Style - Rear of Catalyst - California 4 wire

Notes: Production: 08/1988-, Front of Catalyst 4 wire

Notes: Production: 08/1988-, Rear of Catalyst - California

Notes: Production: 08/1988-, Front of Catalyst 4 wire

Notes: Production: 08/1988-, Rear of Catalyst - California - Regular Cab (RN101)

Notes: Production: 08/1988-, OE Style - Rear of Catalyst - California 4 wire