GM 12146281
Junction Block

The procedure starts with disconnecting the negative Battery Cable(s). Next remove the right side end panel before proceeding. Disconnect all wiring connectors attached to the front part of ip junction block before unclipping the harness from its fastener. To remove the ip wiring harness junction block squeeze its two retaining clips and pull it out toward the rear. The lower ip light bulb requires counterclockwise twisting and then rearward removal. The ip wiring harness junction block needs to be slipped through a hole in the ip while all wiring connectors must be detached from its rear section before extracting it from the vehicle. Insert every wire connector to the back of the ip wiring harness junction block then guide it through the ip hole. Connect the lower ip light bulb through clock-wise bulb socket rotation combined with bulb pushing in before doing the same for the ip wiring harness junction block connection to the ip through clip pressure application leading to a sealed connection. To complete the installation, install the right side end panel then reattach the negative Battery Cable(s) while connecting wiring connector(s) to the front of the ip wiring harness junction block.

The replacement of the underhood Fuse Box demands starting with the removal of the negative Battery Cable then removing the left rear fender brace. You should start by removing the engine wiring harness junction block cover then disconnect the positive Battery Cable bolt attached to the junction block. You can reach the connectors by first detaching the chassis harness from the junction block before unsnapping the block from its bracket. The junction block can then move up to expose the connectors. The engine wiring harness junction block requires disconnection of seven connectors: the forward lamp harness (32 way) connector, the instrument panel harness (68 way) connector, the instrument panel harness (2 way) connector, the engine harness (68 way) connector, the engine harness (1 way) connector, the chassis harness (32 way) connector, and the chassis harness (2 way) connector. Detach then dismount the engine wiring harness junction block from its bracket. To install the engine wiring harness junction block begin by fitting it to the mounting bracket followed by installation of the chassis harness (32 way) connector and chassis harness (2 way) connector with an 6 n.m (53 lb in) torque. Following installation of the engine harness (68 way) connector comes the engine harness (1 way) connector which should be tightened to 6 n.m (53 lb in). The workshop should begin by securing the instrument panel harness (68 way) connector that requires 6 n.m (53 lb in) torque, then add the instrument panel harness (2 way) connector with the same level of torque. Next are forward lamp harness (32 way) connector installation with 6 n.m (53 lb in) torque. Secure the engine wiring harness junction block onto the bracket before attaching the chassis harness to the junction block with a torque of 6 n.m (53 lb in). The positive Battery Cable bolt requires installation onto the engine wiring harness junction block while tightening it to 9 n.m (80 lb in) torque before securing the engine harness junction block cover and left rear fender brace. Complete the procedure by connecting the negative Battery Cable and tightening its bolt to reach 17 n.m (13 lb ft).