Note:Over extended time and mileage, deposits may accumulate on the back of the throttlevalve plate. Typically these deposits pose no problem. Occasionally the deposit mayaccumulate to a point where perceived pedal effort or throttle valve movement is effected.
Remove the air cleaner outlet duct. Refer toAir Cleaner Outlet Duct Replacement.Warning:Turn OFF the ignition before inserting fingers into thethrottle bore. Unexpected movement of the throttle blade couldcause personal injury.
Caution:Do not insert any tools into the throttle body bore in orderto avoid damage to the throttle valve plate.
Inspect the throttle body bore and the throttle valve plate for deposits. You willneed to open the throttle valve in order to inspect all surfaces.Caution:Do not use any solvent that contains Methyl Ethyl Ketone(MEK). This solvent may damage fuel system components.
Clean the throttle body bore and the throttle valve plate using a clean shop towelwith GM top engine cleaner, GM P/N-1052626 (Canadian-P/N-993026) or AC-Delco CarburetorTune-Up Conditioner, P/N X66–P, or an equivalent product.Install the air cleaner outlet duct. Refer toAir Cleaner Outlet Duct Replacement.Perform the Throttle/Idle Learn procedure. Refer toQ38 Throttle Body: Throttle/Idle Learn.
Throttle Body Cleaning Engine Control Air Metering/Acceleration Throttle
Fuel System Cleaning Engine ControlElectrical Center Identification Views
Figure 1: X50A Fuse Block - Underhood, Bottom ViewFigure 2: X50A Fuse Block - Underhood, Top ViewFigure 3: X50A Fuse Block - Underhood X1Figure 4: X50A Fuse Block - Underhood X4Figure 5: X50A Fuse Block - Underhood X6 (LEA)Figure 6: X50A Fuse Block - Underhood LabelFigure 7: X51A Fuse Block - Instru ...