Input Speed Sensor Installation

WARNING: This page is about a different car, the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Input Speed Sensor (ISS) Assembly

Courtesy of GENERAL MOTORS CORP.

Inspect the input speed sensor (ISS) assembly (250) for the following conditions:
- Cracked or damaged housing
- Worn, broken or missing harness brackets; replace the ISS assembly if necessary
- Damaged or worn wining or electrical connector
- Loose, missing or damaged mounting bolt insert

Fig 2: Identifying Input Speed Sensor (ISS) O-Ring

Courtesy of GENERAL MOTORS CORP.

Remove the ISS O-ring (249) and discard.
Lubricate NEW O-ring (249) with transmission fluid and position the O-ring as shown.
Insert the ISS (250) into oil pump ISS bore and fully seat.
Align ISS bolt hole insert with the oil pump mounting hole.

NOTE: Refer to Fastener Notice .

Install bolt (247).
Tighten: Tighten the bolt to 9-11 N.m (6.6-8.1 lb ft).

Fig 3: Identifying ISS Assembly Wire Harness

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Ensure the ISS brackets securley fasten the wiring harness to the pump housing.

Route the ISS assembly (250) wire harness as shown. Install harness bracket #1 and #2 in the locations shown. Ensure the wire harness lays flat against the pump housing.