GM 12572879
Heat Shield

Start exhaust Muffler heat shield replacement by removing the Muffler assembly according to either Muffler replacement (NB5) or Muffler replacement (NEA/NEB). The first step is to unscrew the exhaust Muffler front heat shield nuts before proceeding to remove the exhaust Muffler front heat shield. You should disconnect the exhaust Muffler heat shield nuts before removing both the exhaust Muffler heat shield and the exhaust Muffler front shield nuts . Place the exhaust Muffler heat shield on the floor panel before installing the exhaust Muffler heat shield nuts at 9 n.m strength (80 lb in torque). Place the exhaust Muffler front heat shield on the floor panel before installing its nuts and exert them to 9 n.m while tightening (80 lb in). Ending the replacement work by bringing back the Muffler assembly through guidelines mentioned in Muffler replacement (NB5) or Muffler replacement (NEA/NEB).

The first step to replace a left exhaust manifold heat shield is the removal of the fuel injector sight shield. Seller the heated Oxygen Sensor (HO2S) electrical connector by disconnecting its power harness from the wiring harness electrical connector. Then separate the ho2s electrical connector retainer from the harness clip. Start by removing exhaust manifold heat shield bolts before taking off the heat shield by moving it upward over the ho2s pigtail. The new exhaust manifold heat shield installation requires positioning it downward over the ho2s pigtail before tightening all bolts to 10 nm (89 lb in). Put together the wiring harness electrical connector of the engine with the ho2s electrical connector while securing the ho2s electrical connector retainer to the wiring harness clip. Recovery of the fuel injector sight shield should be your last step.

The first step to replace the exhaust Muffler heat shield involves removing the Muffler assembly followed by removing the exhaust Muffler front heat shield nuts and front heat shield itself. The next step requires removal of the exhaust Muffler heat shield nuts before taking out the exhaust Muffler heat shield. The installer should position the exhaust Muffler heat shield on the floor panel followed by installing the exhaust Muffler heat shield nuts which should be tightened to 9 n.m (80 lb in). Install the exhaust Muffler front heat shield to the floor panel before installing its nuts and tightening them to 9 n.m (80 lb in). Finally, reinstall the Muffler assembly.

The first step for heat shield replacement on the left side exhaust manifold is to remove the fuel injector sight shield. Remove the HO2S electrical connector from its harness electrical connector on the engine. After that remove the engine wiring harness clip retention of the electrical connector. After removing the exhaust manifold heat shield bolts the technician should pull the heat shield upwards over the HO2S harness. After positioning the new exhaust manifold heat shield below the HO2S pigtail it should be fastened using exhaust manifold heat shield bolts while tightening them to 10 N.m (89 lb in). Return the engine wiring harness electrical connector to connect it with the HO2S electrical connector while adding the HO2S electrical connector retainer to the wiring harness clip followed by mounting the fuel injector sight shield.

The first step to replace the left side exhaust manifold heat shield requires removal of the fuel injector sight shield. The first task is to disconnect the engine wiring harness electrical connector from the heated oxygen sensor (HO2S) electrical connector and separate the HO2S electrical connector retainer from the engine wiring harness clip . Begin by removing the exhaust manifold heat shield bolts before pulling the shield upward while rising over the HO2S pigtail. Insert the new exhaust manifold heat shield on top of the HO2S pigtail before you install the exhaust manifold heat shield bolts which need to be tightened to 10 Nm (89 lb in). Finish the procedure by connecting the engine wiring harness electrical connector to the HO2S electrical connector then replace the wiring harness clip retainer followed by reinstallation of the fuel injector sight shield.

The first step to replace right side exhaust manifold heat shield requires removal of the exhaust flexible pipe. You must disconnect the engine wiring harness electrical connector which connects to the heated Oxygen Sensor (HO2S) electrical connector then extract the ho2s electrical connector retainer from the engine wiring harness clip. The next step involves removing the exhaust manifold heat shield bolts then pulling off the heat shield when sliding it up past the ho2s pigtail. Secure the new exhaust manifold heat shield by lowering it down over the ho2s pigtail then fasten it with exhaust manifold heat shield bolts which need to achieve 10 n.m (89 lb in) torque. One should reconnect the ho2s wiring components to the ho2s electrical connector before securing the engine wiring harness clip with the ho2s connector retainer. The last step is to install and tighten the exhaust flexible pipe.

Position the exhaust muffler front heat shield to the floor panel, install the exhaust muffler front heat shield nuts, and tighten them to 9 Nm (80 lb in).

Position the exhaust muffler front heat shield to the floor panel, install the exhaust muffler front heat shield nuts, and tighten them to 9 Nm (80 lb in).

Disconnect the engine wiring harness electrical connector from the heated oxygen sensor (HO2S) electrical connector.

Install the dash panel heat shield nut and tighten it to 10 Nm (89 lb in).

Install the dash panel heat shield nut and tighten it to 10 N.m (89 lb in).

Take out the exhaust manifold heat shield bolts and then remove the heat shield itself.

Lower the vehicle.

First, remove the exhaust manifold lower heat shield bolts (1, 2) and then take off the heat shield.

Reinstall the exhaust flexible pipe and finally, the HO2S.

Remove the exhaust manifold lower heat shield bolts and then take off the exhaust manifold lower heat shield.

Tighten them to 10 Nm (89 lb in).