S15/T15 Sonoma P/U 2WD L4-2.2L VIN 5 Flex Fuel (2001)
Air Injection Pump: Technical Service Bulletins
Emissions - SES/MIL Lamp ON/DTC P0410 Set
Bulletin No.: 04-06-04-015A
Date: November 28, 2006
TECHNICAL
Subject:
LN2, L43 or L35 Engine SES/MIL Light Illuminated, AIR Pump Ingesting Water and DTC P0410 Set (Replace AIR Pump and Inlet Hose Assembly)
Models:
1999-2003 Chevrolet Blazer, S10
1999-2001 GMC Jimmy
1999-2003 GMC Sonoma
1999-2001 Oldsmobile Bravada
with Vortec 2.2L I4 or 4.3L V6 Engine (VINs 4, 5, W - RPOs LN2, L43, L35)
Supercede:
This bulletin is being revised to remove a part number and change the two AIR pump part numbers in the Parts Information. Please discard Corporate
Bulletin Number 04-06-04-015 (Section 06 - Engine/Propulsion System).
Condition
Some customers may comment on the SES/MIL light being illuminated. Upon investigation, the technician may find a DTC P0410 indicating that there
is a concern in the secondary air injection system.
Cause
Water may have collected in the AIR pump or the vent solenoid and frozen or corroded the pump.
Correction
Replace the AIR pump and install a new inlet hose and solenoid tube assembly using the following procedure:
Raise the vehicle on a hoist.
Remove the shield covering the AIR pump.
Remove the hose and vacuum lines from the pump and solenoid.
Remove the AIR pump inlet hose. Do not re-use the hose.
Disconnect the electrical connectors from the pump and solenoid.
Remove the pump mounting bolts and pump.
Transfer the isolators from the old pump to the new pump.
Install the new AIR pump and bolts to the vehicle.
Tighten
Tighten the bolts to 17 N.m (12.5 lb ft).
Route the new hose assembly up between the engine and fender. The hose should come up near the area between the battery and the coolant bottle.
Connect the new inlet hose to the pump inlet.
Connect the old outlet hose to the pump outlet.
Connect the electrical connector to the pump.
