While on the interstate...i used my cruise control and had the a/c on and noticed by blazer getting real sluggish and struggling to keep the "speed"..engine light came on and the code was...po410..p for powertrain..o for sae...4 for aux,emission cont....1 for fuel and air metering...0 for reserved.(code=secondary air injection system)..the blazer runs better now ..but the engine light still comes on ...with same code....mechanic on saturday said he couldn't find a problem..help :screwy:

Secondary Air injection system Malfunction

Replace the electric air pump, solenoid valve,
(under the rt. bottom of rad. support.) Also
replace the check valve on lt.rear side of engine. You will also need to locate the 30A
fuse behind the battery and replace it because the pump takes it out. Parts come from GM only,
and will run about $250 for all.
Disconnect battery for 10 mins. after to reset

Secondary Air injection system Malfunction

Replace the electric air pump, solenoid valve,
(under the rt. bottom of rad. support.) Also
replace the check valve on lt.rear side of engine. You will also need to locate the 30A
fuse behind the battery and replace it because the pump takes it out. Parts come from GM only,
and will run about $250 for all.
Disconnect battery for 10 mins. after to reset


thank you very much....

ur velcome ;)

Did this do the trick for your blazer?